Hello Blokas, I have an old Akai LPD8 pad controller (the usb type) but it’s not showing up in alsa on my Pisound.
amidi -l
Dir Device Name
IO hw:0,0 pisound MIDI PS-0D32Z7E
The device lights up when I plug it in, but that’s all.
(
Hey, try running dmesg command - it should contain some information at the moment the USB device was plugged in.
Here is the relevant bit of dmesg…
3.780757] usb 1-1.4: New USB device found, idVendor=09e8, idProduct=0075, bcdDevice= 1.00
[ 3.791395] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3.800916] usb 1-1.4: Product: LPD8
[ 3.806608] usb 1-1.4: Manufacturer: AKAI professional LLC
This information looks alright. It’d be useful to see the entire log too - there might be some warnings or errors near that moment.
Also, what is the full output you get after running this command:
lsusb -v
I tried to include these outputs as text files but it seems you can’t upload .txt files…
Seems like the LPD8 is recognised by the system but not by Alsa.
Here is the output of lsusb -v:
lsusb -v
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.00
bDeviceClass 9 Hub
bDeviceSubClass 0
bDeviceProtocol 3
bMaxPacketSize0 9
idVendor 0x1d6b Linux Foundation
idProduct 0x0003 3.0 root hub
bcdDevice 5.10
iManufacturer 3
iProduct 2
iSerial 1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x001f
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 12
bMaxBurst 0
Bus 001 Device 003: ID 09e8:0075 AKAI Professional M.I. Corp.
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 16
idVendor 0x09e8 AKAI Professional M.I. Corp.
idProduct 0x0075
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0065
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 0x0009
bInCollection 1
baInterfaceNr(0) 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 1 Audio
bInterfaceSubClass 3 MIDI Streaming
bInterfaceProtocol 0
iInterface 0
MIDIStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 0x0041
MIDIStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (MIDI_IN_JACK)
bJackType 1 Embedded
bJackID 1
iJack 0
MIDIStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (MIDI_IN_JACK)
bJackType 2 External
bJackID 2
iJack 0
MIDIStreaming Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (MIDI_OUT_JACK)
bJackType 1 Embedded
bJackID 3
bNrInputPins 1
baSourceID( 0) 2
BaSourcePin( 0) 1
iJack 0
MIDIStreaming Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (MIDI_OUT_JACK)
bJackType 2 External
bJackID 4
bNrInputPins 1
baSourceID( 0) 1
BaSourcePin( 0) 1
iJack 0
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
bRefresh 0
bSynchAddress 0
MIDIStreaming Endpoint Descriptor:
bLength 5
bDescriptorType 37
bDescriptorSubtype 1 (GENERAL)
bNumEmbMIDIJack 1
baAssocJackID( 0) 1
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
bRefresh 0
bSynchAddress 0
MIDIStreaming Endpoint Descriptor:
bLength 5
bDescriptorType 37
bDescriptorSubtype 1 (GENERAL)
bNumEmbMIDIJack 1
baAssocJackID( 0) 3
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.10
bDeviceClass 9 Hub
bDeviceSubClass 0
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x2109 VIA Labs, Inc.
idProduct 0x3431 Hub
bcdDevice 4.21
iManufacturer 0
iProduct 1
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0019
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 12
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x1d6b Linux Foundation
idProduct 0x0002 2.0 root hub
bcdDevice 5.10
iManufacturer 3
iProduct 2
iSerial 1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0019
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 12
…and here the complete dmesg output:
dmesg
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.10.17-v7l+ (dom@buildbot) (arm-linux-gnueabihf-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1403 SMP Mon Feb 22 11:33:35 GMT 2021
[ 0.000000] CPU: ARMv7 Processor [410fd083] revision 3 (ARMv7), cr=30c5383d
[ 0.000000] CPU: div instructions available: patching division code
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[ 0.000000] OF: fdt: Machine model: Raspberry Pi 4 Model B Rev 1.4
[ 0.000000] Memory policy: Data cache writealloc
[ 0.000000] Reserved memory: created CMA memory pool at 0x000000002ac00000, size 64 MiB
[ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000000000000-0x000000002fffffff]
[ 0.000000] Normal empty
[ 0.000000] HighMem [mem 0x0000000030000000-0x00000001ffffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000037ffffff]
[ 0.000000] node 0: [mem 0x0000000040000000-0x00000000fbffffff]
[ 0.000000] node 0: [mem 0x0000000100000000-0x00000001ffffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x00000001ffffffff]
[ 0.000000] On node 0 totalpages: 2048000
[ 0.000000] DMA zone: 2304 pages used for memmap
[ 0.000000] DMA zone: 0 pages reserved
[ 0.000000] DMA zone: 196608 pages, LIFO batch:63
[ 0.000000] HighMem zone: 1851392 pages, LIFO batch:63
[ 0.000000] percpu: Embedded 20 pages/cpu s50700 r8192 d23028 u81920
[ 0.000000] pcpu-alloc: s50700 r8192 d23028 u81920 alloc=20*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 2045696
[ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=1 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 bcm2708_fb.fbwidth=1440 bcm2708_fb.fbheight=900 bcm2708_fb.fbswap=1 smsc95xx.macaddr=DC:A6:32:EE:CB:E1 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=ttyS0,115200 console=tty1 root=PARTUUID=29a4e322-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait dwc_otg.speed=1
[ 0.000000] Kernel parameter elevator= does not have any effect anymore.
Please use sysfs to set IO scheduler for individual devices.
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] software IO TLB: mapped [mem 0x0000000020c00000-0x0000000024c00000] (64MB)
[ 0.000000] Memory: 7944456K/8192000K available (10240K kernel code, 1358K rwdata, 3160K rodata, 2048K init, 890K bss, 182008K reserved, 65536K cma-reserved, 7405568K highmem)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] ftrace: allocating 33942 entries in 67 pages
[ 0.000000] ftrace: allocated 67 pages with 3 groups
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] Rude variant of Tasks RCU enabled.
[ 0.000000] Tracing variant of Tasks RCU enabled.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] GIC: Using split EOI/Deactivate mode
[ 0.000000] random: get_random_bytes called from start_kernel+0x3c8/0x59c with crng_init=0
[ 0.000008] sched_clock: 32 bits at 1000kHz, resolution 1000ns, wraps every 2147483647500ns
[ 0.000034] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns
[ 0.000097] bcm2835: system timer (irq = 25)
[ 0.000755] arch_timer: cp15 timer(s) running at 54.00MHz (phys).
[ 0.000776] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0xc743ce346, max_idle_ns: 440795203123 ns
[ 0.000798] sched_clock: 56 bits at 54MHz, resolution 18ns, wraps every 4398046511102ns
[ 0.000816] Switching to timer-based delay loop, resolution 18ns
[ 0.001068] Console: colour dummy device 80x30
[ 0.001831] printk: console [tty1] enabled
[ 0.001899] Calibrating delay loop (skipped), value calculated using timer frequency.. 108.00 BogoMIPS (lpj=540000)
[ 0.001953] pid_max: default: 32768 minimum: 301
[ 0.002133] LSM: Security Framework initializing
[ 0.002330] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.002375] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.003941] Disabling memory control group subsystem
[ 0.004075] CPU: Testing write buffer coherency: ok
[ 0.004532] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[ 0.005735] Setting up static identity map for 0x200000 - 0x20003c
[ 0.005947] rcu: Hierarchical SRCU implementation.
[ 0.006869] smp: Bringing up secondary CPUs ...
[ 0.008053] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[ 0.009383] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[ 0.010647] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[ 0.010894] smp: Brought up 1 node, 4 CPUs
[ 0.010925] SMP: Total of 4 processors activated (432.00 BogoMIPS).
[ 0.010955] CPU: All CPU(s) started in HYP mode.
[ 0.010982] CPU: Virtualization extensions available.
[ 0.011797] devtmpfs: initialized
[ 0.025937] VFP support v0.3: implementor 41 architecture 3 part 40 variant 8 rev 0
[ 0.026179] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.026232] futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
[ 0.028214] pinctrl core: initialized pinctrl subsystem
[ 0.029260] NET: Registered protocol family 16
[ 0.033113] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[ 0.033913] audit: initializing netlink subsys (disabled)
[ 0.034183] audit: type=2000 audit(0.030:1): state=initialized audit_enabled=0 res=1
[ 0.034722] thermal_sys: Registered thermal governor 'step_wise'
[ 0.035474] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[ 0.035529] hw-breakpoint: maximum watchpoint size is 8 bytes.
[ 0.035924] Serial: AMBA PL011 UART driver
[ 0.071072] bcm2835-mbox fe00b880.mailbox: mailbox enabled
[ 0.090894] raspberrypi-firmware soc:firmware: Attached to firmware from 2021-02-25T12:11:39, variant start_x
[ 0.100909] raspberrypi-firmware soc:firmware: Firmware hash is 564e5f9b852b23a330b1764bcf0b2d022a20afd0
[ 0.145789] bcm2835-dma fe007000.dma: DMA legacy API manager, dmachans=0x1
[ 0.149939] vgaarb: loaded
[ 0.150396] SCSI subsystem initialized
[ 0.150631] usbcore: registered new interface driver usbfs
[ 0.150719] usbcore: registered new interface driver hub
[ 0.150805] usbcore: registered new device driver usb
[ 0.151463] usb_phy_generic phy: supply vcc not found, using dummy regulator
[ 0.153379] clocksource: Switched to clocksource arch_sys_counter
[ 1.152779] VFS: Disk quotas dquot_6.6.0
[ 1.152900] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 1.153089] FS-Cache: Loaded
[ 1.153290] CacheFiles: Loaded
[ 1.163761] NET: Registered protocol family 2
[ 1.164583] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[ 1.164741] TCP established hash table entries: 8192 (order: 3, 32768 bytes, linear)
[ 1.164821] TCP bind hash table entries: 8192 (order: 4, 65536 bytes, linear)
[ 1.164904] TCP: Hash tables configured (established 8192 bind 8192)
[ 1.165067] UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 1.165121] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 1.165410] NET: Registered protocol family 1
[ 1.166137] RPC: Registered named UNIX socket transport module.
[ 1.166170] RPC: Registered udp transport module.
[ 1.166199] RPC: Registered tcp transport module.
[ 1.166226] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 1.166264] PCI: CLS 0 bytes, default 64
[ 1.169235] Initialise system trusted keyrings
[ 1.169491] workingset: timestamp_bits=14 max_order=21 bucket_order=7
[ 1.178041] zbud: loaded
[ 1.179925] FS-Cache: Netfs 'nfs' registered for caching
[ 1.180682] NFS: Registering the id_resolver key type
[ 1.180735] Key type id_resolver registered
[ 1.180763] Key type id_legacy registered
[ 1.180928] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 1.181969] Key type asymmetric registered
[ 1.182001] Asymmetric key parser 'x509' registered
[ 1.182206] bounce: pool size: 64 pages
[ 1.182261] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[ 1.182492] io scheduler mq-deadline registered
[ 1.182523] io scheduler kyber registered
[ 1.186979] brcm-pcie fd500000.pcie: host bridge /scb/pcie@7d500000 ranges:
[ 1.187032] brcm-pcie fd500000.pcie: No bus range found for /scb/pcie@7d500000, using [bus 00-ff]
[ 1.187134] brcm-pcie fd500000.pcie: MEM 0x0600000000..0x063fffffff -> 0x00c0000000
[ 1.187243] brcm-pcie fd500000.pcie: IB MEM 0x0000000000..0x00bfffffff -> 0x0400000000
[ 1.245480] brcm-pcie fd500000.pcie: link up, 5.0 GT/s PCIe x1 (SSC)
[ 1.245876] brcm-pcie fd500000.pcie: PCI host bridge to bus 0000:00
[ 1.245913] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 1.245961] pci_bus 0000:00: root bus resource [mem 0x600000000-0x63fffffff] (bus address [0xc0000000-0xffffffff])
[ 1.246070] pci 0000:00:00.0: [14e4:2711] type 01 class 0x060400
[ 1.246324] pci 0000:00:00.0: PME# supported from D0 D3hot
[ 1.249862] PCI: bus0: Fast back to back transfers disabled
[ 1.250218] pci 0000:01:00.0: [1106:3483] type 00 class 0x0c0330
[ 1.250360] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x00000fff 64bit]
[ 1.250809] pci 0000:01:00.0: PME# supported from D0 D3hot
[ 1.254354] PCI: bus1: Fast back to back transfers disabled
[ 1.254431] pci 0000:00:00.0: BAR 8: assigned [mem 0x600000000-0x6000fffff]
[ 1.254471] pci 0000:01:00.0: BAR 0: assigned [mem 0x600000000-0x600000fff 64bit]
[ 1.254571] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 1.254610] pci 0000:00:00.0: bridge window [mem 0x600000000-0x6000fffff]
[ 1.255024] pcieport 0000:00:00.0: enabling device (0140 -> 0142)
[ 1.255249] pcieport 0000:00:00.0: PME: Signaling with IRQ 63
[ 1.256197] bcm2708_fb soc:fb: FB found 1 display(s)
[ 1.285971] Console: switching to colour frame buffer device 180x56
[ 1.292393] bcm2708_fb soc:fb: Registered framebuffer for display 0, size 1440x900
[ 1.297727] Serial: 8250/16550 driver, 1 ports, IRQ sharing enabled
[ 1.298693] bcm2835-aux-uart fe215040.serial: there is not valid maps for state default
[ 1.301272] iproc-rng200 fe104000.rng: hwrng registered
[ 1.301629] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
[ 1.302593] gpiomem-bcm2835 fe200000.gpiomem: Initialised: Registers at 0xfe200000
[ 1.314755] brd: module loaded
[ 1.326969] loop: module loaded
[ 1.328649] Loading iSCSI transport class v2.0-870.
[ 1.331124] libphy: Fixed MDIO Bus: probed
[ 1.332917] bcmgenet fd580000.ethernet: GENET 5.0 EPHY: 0x0000
[ 1.353454] libphy: bcmgenet MII bus: probed
[ 1.433541] unimac-mdio unimac-mdio.-19: Broadcom UniMAC MDIO bus
[ 1.434739] usbcore: registered new interface driver r8152
[ 1.434866] usbcore: registered new interface driver lan78xx
[ 1.434983] usbcore: registered new interface driver smsc95xx
[ 1.481296] xhci_hcd 0000:01:00.0: xHCI Host Controller
[ 1.481388] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1
[ 1.484160] xhci_hcd 0000:01:00.0: hcc params 0x002841eb hci version 0x100 quirks 0x0000030000000890
[ 1.485553] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
[ 1.485650] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.487807] usb usb1: Product: xHCI Host Controller
[ 1.489941] usb usb1: Manufacturer: Linux 5.10.17-v7l+ xhci-hcd
[ 1.492061] usb usb1: SerialNumber: 0000:01:00.0
[ 1.494920] hub 1-0:1.0: USB hub found
[ 1.497097] hub 1-0:1.0: 1 port detected
[ 1.499801] xhci_hcd 0000:01:00.0: xHCI Host Controller
[ 1.501864] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 2
[ 1.503951] xhci_hcd 0000:01:00.0: Host supports USB 3.0 SuperSpeed
[ 1.506481] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
[ 1.508525] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.510567] usb usb2: Product: xHCI Host Controller
[ 1.512599] usb usb2: Manufacturer: Linux 5.10.17-v7l+ xhci-hcd
[ 1.514673] usb usb2: SerialNumber: 0000:01:00.0
[ 1.517382] hub 2-0:1.0: USB hub found
[ 1.519469] hub 2-0:1.0: 4 ports detected
[ 1.523252] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 1.525606] dwc_otg: FIQ enabled
[ 1.525621] dwc_otg: NAK holdoff enabled
[ 1.525635] dwc_otg: FIQ split-transaction FSM enabled
[ 1.525653] Module dwc_common_port init
[ 1.526104] usbcore: registered new interface driver uas
[ 1.528207] usbcore: registered new interface driver usb-storage
[ 1.530375] mousedev: PS/2 mouse device common for all mice
[ 1.534078] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
[ 1.539573] sdhci: Secure Digital Host Controller Interface driver
[ 1.541589] sdhci: Copyright(c) Pierre Ossman
[ 1.544370] mmc-bcm2835 fe300000.mmcnr: could not get clk, deferring probe
[ 1.547059] sdhci-pltfm: SDHCI platform and OF driver helper
[ 1.553162] ledtrig-cpu: registered to indicate activity on CPUs
[ 1.555557] hid: raw HID events driver (C) Jiri Kosina
[ 1.557746] usbcore: registered new interface driver usbhid
[ 1.559772] usbhid: USB HID core driver
[ 1.567154] Initializing XFRM netlink socket
[ 1.569336] NET: Registered protocol family 17
[ 1.571452] Key type dns_resolver registered
[ 1.573849] Registering SWP/SWPB emulation handler
[ 1.575973] registered taskstats version 1
[ 1.577897] Loading compiled-in X.509 certificates
[ 1.580559] Key type ._fscrypt registered
[ 1.582430] Key type .fscrypt registered
[ 1.584343] Key type fscrypt-provisioning registered
[ 1.597478] uart-pl011 fe201000.serial: there is not valid maps for state default
[ 1.599680] uart-pl011 fe201000.serial: cts_event_workaround enabled
[ 1.601622] fe201000.serial: ttyAMA0 at MMIO 0xfe201000 (irq = 36, base_baud = 0) is a PL011 rev2
[ 1.610162] bcm2835-aux-uart fe215040.serial: there is not valid maps for state default
[ 1.612854] printk: console [ttyS0] disabled
[ 1.614971] fe215040.serial: ttyS0 at MMIO 0xfe215040 (irq = 38, base_baud = 62500000) is a 16550
[ 2.912626] printk: console [ttyS0] enabled
[ 2.921523] bcm2835-power bcm2835-power: Broadcom BCM2835 power domains driver
[ 2.932091] mmc-bcm2835 fe300000.mmcnr: mmc_debug:0 mmc_debug2:0
[ 2.940265] mmc-bcm2835 fe300000.mmcnr: DMA channel allocated
[ 2.978554] of_cfs_init
[ 2.983303] of_cfs_init: OK
[ 3.002094] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[ 3.011339] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 3.020563] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 3.028107] mmc0: SDHCI controller on fe340000.emmc2 [fe340000.emmc2] using ADMA
[ 3.031114] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[ 3.038517] Waiting for root device PARTUUID=29a4e322-02...
[ 3.046882] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[ 3.063471] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[ 3.105717] random: fast init done
[ 3.140054] mmc1: new high speed SDIO card at address 0001
[ 3.173235] mmc0: new ultra high speed DDR50 SDXC card at address aaaa
[ 3.182819] mmcblk0: mmc0:aaaa SD64G 59.5 GiB
[ 3.191499] mmcblk0: p1 p2
[ 3.216529] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 3.226877] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[ 3.236714] devtmpfs: mounted
[ 3.246073] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.21
[ 3.256493] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 3.265815] usb 1-1: Product: USB2.0 Hub
[ 3.275250] Freeing unused kernel memory: 2048K
[ 3.283340] hub 1-1:1.0: USB hub found
[ 3.289496] hub 1-1:1.0: 4 ports detected
[ 3.295925] Run /sbin/init as init process
[ 3.302103] with arguments:
[ 3.302118] /sbin/init
[ 3.302132] with environment:
[ 3.302146] HOME=/
[ 3.302160] TERM=linux
[ 3.633439] usb 1-1.4: new full-speed USB device number 3 using xhci_hcd
[ 3.729059] systemd[1]: System time before build time, advancing clock.
[ 3.780757] usb 1-1.4: New USB device found, idVendor=09e8, idProduct=0075, bcdDevice= 1.00
[ 3.791395] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3.800916] usb 1-1.4: Product: LPD8
[ 3.806608] usb 1-1.4: Manufacturer: AKAI professional LLC
[ 3.878830] NET: Registered protocol family 10
[ 3.886798] Segment Routing with IPv6
[ 3.950596] systemd[1]: systemd 241 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid)
[ 3.978345] systemd[1]: Detected architecture arm.
[ 4.079202] systemd[1]: Set hostname to <Pisound>.
[ 4.896860] random: systemd: uninitialized urandom read (16 bytes read)
[ 4.917852] random: systemd: uninitialized urandom read (16 bytes read)
[ 4.927095] systemd[1]: Reached target Swap.
[ 4.937045] random: systemd: uninitialized urandom read (16 bytes read)
[ 4.949268] systemd[1]: Created slice system-systemd\x2dfsck.slice.
[ 4.961863] systemd[1]: Listening on udev Control Socket.
[ 4.973470] systemd[1]: Listening on Journal Socket.
[ 4.989415] systemd[1]: Mounting POSIX Message Queue File System...
[ 5.007636] systemd[1]: Mounting RPC Pipe File System...
[ 5.020525] systemd[1]: Created slice system-getty.slice.
[ 5.184407] i2c /dev entries driver
[ 5.732268] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 5.846588] systemd-journald[123]: Received request to flush runtime journal from PID 1
[ 6.106378] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 6.495796] rpivid-mem feb00000.hevc-decoder: rpivid-hevcmem initialised: Registers at 0xfeb00000 length 0x00010000
[ 6.496754] rpivid-mem feb10000.rpivid-local-intc: rpivid-intcmem initialised: Registers at 0xfeb10000 length 0x00001000
[ 6.497901] rpivid-mem feb20000.h264-decoder: rpivid-h264mem initialised: Registers at 0xfeb20000 length 0x00010000
[ 6.498667] rpivid-mem feb30000.vp9-decoder: rpivid-vp9mem initialised: Registers at 0xfeb30000 length 0x00010000
[ 6.532512] mc: Linux media interface: v0.10
[ 6.576655] videodev: Linux video capture interface: v2.00
[ 6.603593] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.605034] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.605965] bcm2835_vc_sm_cma_probe: Videocore shared memory driver
[ 6.605990] [vc_sm_connected_init]: start
[ 6.610864] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.619326] [vc_sm_connected_init]: installed successfully
[ 6.625789] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.625797] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.627799] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.638351] bcm2835_codec: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.639472] bcm2835_v4l2: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.645017] bcm2835_isp: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.660824] bcm2835-codec bcm2835-codec: Device registered as /dev/video10
[ 6.661000] bcm2835-codec bcm2835-codec: Loaded V4L2 decode
[ 6.685148] bcm2835-isp bcm2835-isp: Device node output[0] registered as /dev/video13
[ 6.728809] pisound: Searching for spi device...
[ 6.728831] pisound: Found!
[ 6.879969] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 6.928504] pisound: Detected Pisound card:
[ 6.928523] pisound: Serial: PS-0D32Z7E
[ 6.928539] pisound: Firmware Version: 1.03
[ 6.928554] pisound: Hardware Version: 1.1
[ 6.928569] pisound: Id: 1e931538583231333814380c
[ 7.010990] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 7.161953] brcmfmac: F1 signature read @0x18000000=0x15264345
[ 7.177427] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[ 7.178455] usbcore: registered new interface driver brcmfmac
[ 7.199556] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt failed with error -2
[ 7.290089] bcm2835-codec bcm2835-codec: Device registered as /dev/video11
[ 7.290134] bcm2835-codec bcm2835-codec: Loaded V4L2 encode
[ 7.290457] bcm2835-isp bcm2835-isp: Device node capture[0] registered as /dev/video14
[ 7.291100] bcm2835-isp bcm2835-isp: Device node capture[1] registered as /dev/video15
[ 7.291642] bcm2835-isp bcm2835-isp: Device node stats[2] registered as /dev/video16
[ 7.291684] bcm2835-isp bcm2835-isp: Register output node 0 with media controller
[ 7.291876] bcm2835-isp bcm2835-isp: Register capture node 1 with media controller
[ 7.291900] bcm2835-isp bcm2835-isp: Register capture node 2 with media controller
[ 7.291922] bcm2835-isp bcm2835-isp: Register capture node 3 with media controller
[ 7.292367] bcm2835-isp bcm2835-isp: Loaded V4L2 bcm2835-isp
[ 7.296105] bcm2835-codec bcm2835-codec: Device registered as /dev/video12
[ 7.296148] bcm2835-codec bcm2835-codec: Loaded V4L2 isp
[ 7.437700] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[ 7.447556] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Jan 4 2021 19:56:29 version 7.45.229 (617f1f5 CY) FWID 01-2dbd9d2e
[ 9.396827] uart-pl011 fe201000.serial: no DMA platform data
[ 9.612485] random: crng init done
[ 9.612496] random: 7 urandom warning(s) missed due to ratelimiting
[ 9.862489] 8021q: 802.1Q VLAN Support v1.8
[ 10.345636] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled
[ 10.503612] Adding 102396k swap on /var/swap. Priority:-2 extents:1 across:102396k SSFS
[ 10.795708] bcmgenet fd580000.ethernet: configuring instance for external RGMII (RX delay)
[ 10.796462] bcmgenet fd580000.ethernet eth0: Link is Down
[ 15.914335] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 16.730407] Bluetooth: Core ver 2.22
[ 16.730469] NET: Registered protocol family 31
[ 16.730476] Bluetooth: HCI device and connection manager initialized
[ 16.730491] Bluetooth: HCI socket layer initialized
[ 16.730502] Bluetooth: L2CAP socket layer initialized
[ 16.730517] Bluetooth: SCO socket layer initialized
[ 16.740213] Bluetooth: HCI UART driver ver 2.3
[ 16.740223] Bluetooth: HCI UART protocol H4 registered
[ 16.740273] Bluetooth: HCI UART protocol Three-wire (H5) registered
[ 16.740417] Bluetooth: HCI UART protocol Broadcom registered
[ 16.883331] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 16.883340] Bluetooth: BNEP filters: protocol multicast
[ 16.883422] Bluetooth: BNEP socket layer initialized
[ 16.922072] Bluetooth: RFCOMM TTY layer initialized
[ 16.922089] Bluetooth: RFCOMM socket layer initialized
[ 16.922107] Bluetooth: RFCOMM ver 1.11
[ 23.015454] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled
[ 25.319430] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 26.727751] fuse: init (API version 7.32)
Weird we didn’t notice this before, but I’ve updated the settings to allow txt uploads 
Anyway, surrounding such terminal pastes with ``` and ``` is convenient as well, as it puts it into a textbox with a scrollbar.
What is the output of:
modinfo snd-usb-audio
Also, unplug the device, run this command:
sudo udevadm control --log-priority=debug
plug the device back in, run:
journalctl -u systemd-udevd > udev.log
and upload the udev.log file here.
Btw, this is the dmesg output I get when connecting AKAI MPK Mini keyboard:
[ 25.574088] usb 1-1.3: new full-speed USB device number 3 using xhci_hcd
[ 25.711299] usb 1-1.3: New USB device found, idVendor=09e8, idProduct=007c, bcdDevice= 1.00
[ 25.711320] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 25.711335] usb 1-1.3: Product: MPK mini
[ 25.711350] usb 1-1.3: Manufacturer: AKAI PROFESSIONAL,LP
[ 25.817993] usbcore: registered new interface driver snd-usb-audio
The last line is missing in your case, so trying to figure out why in your case snd-usb-audio kernel module is not getting loaded. 
Could it be that snd-usb-audio conflicts with snd-usb-caiaq? I also have that module enabled on my Pisound…(a shot in the dark)
udev.log (33.8 KB)
Here is the output of modinfo for snd-usb-audio
‘’’
modinfo snd-usb-audio
filename: /lib/modules/5.10.17-v7l+/kernel/sound/usb/snd-usb-audio.ko
license: GPL
description: USB Audio
author: Takashi Iwai tiwai@suse.de
srcversion: BF634107DD5D3AF40B14323
alias: usb:vpddcdscdpic01isc01ipin
alias: usb:v534Dp2109ddcdscdpic01isc01ipin
alias: usb:v2B73p000AddcdscdpicFFiscipin*
alias: usb:v2B73p000EddcdscdpicFFiscipin*
alias: usb:v2B73p0017ddcdscdpicFFiscipin*
alias: usb:v2B73p0023ddcdscdpicFFiscipin*
alias: usb:v07FDp0004ddcdscdpicFFiscipin*
alias: usb:v0BDAp402Eddcdscdpiciscipin
alias: usb:v19B5p0021ddcdscdpiciscipin
alias: usb:vpddcdscdpic01isc03ipin
alias: usb:v1686p00DDddcdscdpiciscipin
alias: usb:v200Cp100Bddcdscdpiciscipin
alias: usb:v045Ep0283ddcdscdpiciscipin
alias: usb:v0644p8021ddcdscdpicFFiscipin*
alias: usb:v0DBAp3000ddcdscdpiciscipin
alias: usb:v0DBAp1000ddcdscdpiciscipin
alias: usb:v05E1p0408ddcdscdpic01isc01ipin
alias: usb:v2040p7270ddcdscdpic01isc01ipin
alias: usb:v2040p7213ddcdscdpic01isc01ipin
alias: usb:v2040p7260ddcdscdpic01isc01ipin
alias: usb:v2040p8200ddcdscdpic01isc01ipin
alias: usb:v05E1p0480ddcdscdpic01isc01ipin
alias: usb:v2040p7281ddcdscdpic01isc01ipin
alias: usb:v2040p7211ddcdscdpic01isc01ipin
alias: usb:v2040p7201ddcdscdpic01isc01ipin
alias: usb:v0FD9p0008ddcdscdpic01isc01ipin
alias: usb:v2040p7280ddcdscdpic01isc01ipin
alias: usb:v2040p721Fddcdscdpic01isc01ipin
alias: usb:v2040p721Eddcdscdpic01isc01ipin
alias: usb:v2040p721Bddcdscdpic01isc01ipin
alias: usb:v2040p7217ddcdscdpic01isc01ipin
alias: usb:v2040p7210ddcdscdpic01isc01ipin
alias: usb:v2040p7240ddcdscdpic01isc01ipin
alias: usb:v2040p7200ddcdscdpic01isc01ipin
alias: usb:v7104p2202ddcdscdpiciscipin
alias: usb:v4752p0011ddcdscdpiciscipin
alias: usb:v1F38p0001ddcdscdpiciscipin
alias: usb:v1A86p752Dddcdscdpiciscipin
alias: usb:v17CCp1020ddcdscdpiciscipin
alias: usb:v17CCp1010ddcdscdpiciscipin
alias: usb:v17CCp1000ddcdscdpiciscipin
alias: usb:v17AAp104Dddcdscdpiciscipin
alias: usb:v17AAp1046ddcdscdpiciscipin
alias: usb:v133Ep0815ddcdscdpicFFiscipin*
alias: usb:v1235p4661ddcdscdpicFFiscipin*
alias: usb:v1235p0018ddcdscdpiciscipin
alias: usb:v1235p0010ddcdscdpiciscipin
alias: usb:v1235p000Eddcdscdpiciscipin
alias: usb:v1235p000Addcdscdpiciscipin
alias: usb:v1235p0002ddcdscdpicFFiscipin*
alias: usb:v1235p0001ddcdscdpicFFiscipin*
alias: usb:v0CCDp0035ddcdscdpiciscipin
alias: usb:v0CCDp0014ddcdscdpicFFiscipin*
alias: usb:v0CCDp0013ddcdscdpicFFiscipin*
alias: usb:v0CCDp0012ddcdscdpicFFiscipin*
alias: usb:v0A4Ep4040ddcdscdpicFFiscipin*
alias: usb:v0A4Ep2040ddcdscdpicFFiscipin*
alias: usb:v09E8p0021ddcdscdpiciscipin
alias: usb:v09E8p0062ddcdscdpiciscipin
alias: usb:v0944p0201ddcdscdpicFFiscipin*
alias: usb:v0944p0200ddcdscdpicFFiscipin*
alias: usb:v086Ap0003ddcdscdpiciscipin
alias: usb:v086Ap0002ddcdscdpiciscipin
alias: usb:v086Ap0001ddcdscdpiciscipin
alias: usb:v07FDp0001ddcdsc02dpiciscipin*
alias: usb:v07CFp6802ddcdscdpiciscipin
alias: usb:v07CFp6801ddcdscdpiciscipin
alias: usb:v0763p2081ddcdscdpicFFiscipin*
alias: usb:v0763p2080ddcdscdpicFFiscipin*
alias: usb:v0763p2031ddcdscdpicFFiscipin*
alias: usb:v0763p2030ddcdscdpicFFiscipin*
alias: usb:v0763p2019ddcdscdpiciscipin
alias: usb:v0763p200DddcdscdpicFFiscipin*
alias: usb:v0763p2008ddcdscdpicFFiscipin*
alias: usb:v0763p2003ddcdscdpicFFiscipin*
alias: usb:v0763p2001ddcdscdpicFFiscipin*
alias: usb:v0763p1041ddcdscdpicFFiscipin*
alias: usb:v0763p1033ddcdscdpicFFiscipin*
alias: usb:v0763p1031d010dcdscdpiciscipin*
alias: usb:v0763p1021ddcdscdpicFFiscipin*
alias: usb:v0763p1015ddcdscdpicFFiscipin*
alias: usb:v0763p1011ddcdscdpicFFiscipin*
alias: usb:v0763p1002ddcdscdpicFFiscipin*
alias: usb:v06F8pB000ddcdscdpicFFiscipin*
alias: usb:v0582pddcdscdpicFFiscipin
alias: usb:v0582p0159ddcdscdpiciscipin
alias: usb:v0582p012Fddcdscdpiciscipin
alias: usb:v0582p0120ddcdscdpiciscipin
alias: usb:v0582p0113ddcdscdpiciscipin
alias: usb:v0582p0108ddcdscdpicFFiscipin*
alias: usb:v0582p00E6ddcdscdpicFFiscipin*
alias: usb:v0582p00C4ddcdscdpiciscipin
alias: usb:v0582p00A3ddcdscdpiciscipin
alias: usb:v0582p008Bddcdscdpiciscipin
alias: usb:v0582p0080ddcdscdpiciscipin
alias: usb:v0582p007AddcdscdpicFFiscipin*
alias: usb:v0582p0075ddcdscdpiciscipin
alias: usb:v0582p0074ddcdscdpicFFiscipin*
alias: usb:v0582p006Dddcdscdpiciscipin
alias: usb:v0582p0065ddcdscdpiciscipin
alias: usb:v0582p0064ddcdscdpiciscipin
alias: usb:v0582p0060ddcdscdpiciscipin
alias: usb:v0582p0052ddcdscdpiciscipin
alias: usb:v0582p0050ddcdscdpiciscipin
alias: usb:v0582p004Dddcdscdpiciscipin
alias: usb:v0582p004Cddcdscdpiciscipin
alias: usb:v0582p0048ddcdscdpiciscipin
alias: usb:v0582p0047ddcdscdpiciscipin
alias: usb:v0582p0042ddcdscdpiciscipin
alias: usb:v0582p0040ddcdscdpiciscipin
alias: usb:v0582p003BddcdscdpicFFiscipin*
alias: usb:v0582p0037ddcdscdpiciscipin
alias: usb:v0582p0033ddcdscdpiciscipin
alias: usb:v0582p002Fddcdscdpiciscipin
alias: usb:v0582p002Dddcdscdpiciscipin
alias: usb:v0582p002BddcdscdpicFFiscipin*
alias: usb:v0582p0029ddcdscdpiciscipin
alias: usb:v0582p0027ddcdscdpiciscipin
alias: usb:v0582p0025ddcdscdpiciscipin
alias: usb:v0582p0023ddcdscdpiciscipin
alias: usb:v0582p001Dddcdscdpiciscipin
alias: usb:v0582p001Bddcdscdpiciscipin
alias: usb:v0582p0016ddcdscdpiciscipin
alias: usb:v0582p0014ddcdscdpiciscipin
alias: usb:v0582p0012ddcdscdpiciscipin
alias: usb:v0582p0010ddcdscdpiciscipin
alias: usb:v0582p000Cddcdscdpiciscipin
alias: usb:v0582p000Bddcdscdpiciscipin
alias: usb:v0582p0009ddcdscdpiciscipin
alias: usb:v0582p0008ddcdscdpiciscipin
alias: usb:v0582p0007ddcdscdpiciscipin
alias: usb:v0582p0005ddcdscdpiciscipin
alias: usb:v0582p0004ddcdscdpiciscipin
alias: usb:v0582p0003ddcdscdpiciscipin
alias: usb:v0582p0002ddcdscdpiciscipin
alias: usb:v0582p0000ddcdscdpiciscipin
alias: usb:v0499pddcdscdpicFFiscipin
alias: usb:v0499p7010ddcdscdpiciscipin
alias: usb:v0499p7000ddcdscdpiciscipin
alias: usb:v0499p500Fddcdscdpiciscipin
alias: usb:v0499p500Eddcdscdpiciscipin
alias: usb:v0499p500Dddcdscdpiciscipin
alias: usb:v0499p500Cddcdscdpiciscipin
alias: usb:v0499p500Bddcdscdpiciscipin
alias: usb:v0499p500Addcdscdpiciscipin
alias: usb:v0499p5009ddcdscdpiciscipin
alias: usb:v0499p5008ddcdscdpiciscipin
alias: usb:v0499p5007ddcdscdpiciscipin
alias: usb:v0499p5006ddcdscdpiciscipin
alias: usb:v0499p5005ddcdscdpiciscipin
alias: usb:v0499p5004ddcdscdpiciscipin
alias: usb:v0499p5003ddcdscdpiciscipin
alias: usb:v0499p5002ddcdscdpiciscipin
alias: usb:v0499p5001ddcdscdpiciscipin
alias: usb:v0499p5000ddcdscdpiciscipin
alias: usb:v0499p2003ddcdscdpiciscipin
alias: usb:v0499p2002ddcdscdpiciscipin
alias: usb:v0499p2001ddcdscdpiciscipin
alias: usb:v0499p2000ddcdscdpiciscipin
alias: usb:v0499p150Cddcdscdpiciscipin
alias: usb:v0499p150Addcdscdpiciscipin
alias: usb:v0499p1509ddcdscdpiciscipin
alias: usb:v0499p1507ddcdscdpiciscipin
alias: usb:v0499p1503ddcdscdpiciscipin
alias: usb:v0499p105Dddcdscdpiciscipin
alias: usb:v0499p105Cddcdscdpiciscipin
alias: usb:v0499p105Bddcdscdpiciscipin
alias: usb:v0499p105Addcdscdpiciscipin
alias: usb:v0499p1059ddcdscdpiciscipin
alias: usb:v0499p1058ddcdscdpiciscipin
alias: usb:v0499p1057ddcdscdpiciscipin
alias: usb:v0499p1056ddcdscdpiciscipin
alias: usb:v0499p1055ddcdscdpiciscipin
alias: usb:v0499p1054ddcdscdpicFFiscipin*
alias: usb:v0499p1053ddcdscdpicFFiscipin*
alias: usb:v0499p1052ddcdscdpiciscipin
alias: usb:v0499p1051ddcdscdpiciscipin
alias: usb:v0499p1050ddcdscdpiciscipin
alias: usb:v0499p104Fddcdscdpiciscipin
alias: usb:v0499p104EddcdscdpicFFiscipin*
alias: usb:v0499p1045ddcdscdpiciscipin
alias: usb:v0499p1044ddcdscdpiciscipin
alias: usb:v0499p1043ddcdscdpiciscipin
alias: usb:v0499p1042ddcdscdpiciscipin
alias: usb:v0499p1041ddcdscdpiciscipin
alias: usb:v0499p1040ddcdscdpiciscipin
alias: usb:v0499p103Fddcdscdpiciscipin
alias: usb:v0499p103Eddcdscdpiciscipin
alias: usb:v0499p103Dddcdscdpiciscipin
alias: usb:v0499p103Cddcdscdpiciscipin
alias: usb:v0499p103Bddcdscdpiciscipin
alias: usb:v0499p103Addcdscdpiciscipin
alias: usb:v0499p1039ddcdscdpiciscipin
alias: usb:v0499p1038ddcdscdpiciscipin
alias: usb:v0499p1037ddcdscdpiciscipin
alias: usb:v0499p1036ddcdscdpiciscipin
alias: usb:v0499p1035ddcdscdpiciscipin
alias: usb:v0499p1034ddcdscdpiciscipin
alias: usb:v0499p1033ddcdscdpiciscipin
alias: usb:v0499p1032ddcdscdpiciscipin
alias: usb:v0499p1031ddcdscdpiciscipin
alias: usb:v0499p1030ddcdscdpiciscipin
alias: usb:v0499p102Eddcdscdpiciscipin
alias: usb:v0499p102Bddcdscdpiciscipin
alias: usb:v0499p102Addcdscdpiciscipin
alias: usb:v0499p1029ddcdscdpiciscipin
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alias: usb:v0403pB8D8ddcdscdpiciscipin
depends: mc,snd-usbmidi-lib,snd-pcm,snd,snd-hwdep
intree: Y
name: snd_usb_audio
vermagic: 5.10.17-v7l+ SMP mod_unload modversions ARMv7 p2v8
parm: index:Index value for the USB audio adapter. (array of int)
parm: id:ID string for the USB audio adapter. (array of charp)
parm: enable:Enable USB audio adapter. (array of bool)
parm: vid:Vendor ID for the USB audio device. (array of int)
parm: pid:Product ID for the USB audio device. (array of int)
parm: device_setup:Specific device setup (if needed). (array of int)
parm: ignore_ctl_error:Ignore errors from USB controller for mixer interfaces. (bool)
parm: autoclock:Enable auto-clock selection for UAC2 devices (default: yes). (bool)
parm: quirk_alias:Quirk aliases, e.g. 0123abcd:5678beef. (array of charp)
parm: delayed_register:Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4. (array of charp)
parm: use_vmalloc:Use vmalloc for PCM intermediate buffers (default: yes). (bool)
parm: skip_validation:Skip unit descriptor validation (default: no). (bool)
‘’’
Aha…so the harm was self inflicted…I had disabled (commented out) snd-usb-audio in the file /etc/modprobe.d/alsa.conf
Thank you for your assistance, and my apologies for being a sievehead.
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