Thank you very much for the quick reply, Giedrius.
I already went into a deeper research about this topic before I came here. I studied the config.txt options as well as the raspi-config options. My final hope is to find an alsa option at /usr/share/alsa. I’m an IT guy, so don’t fear to give me advanced hints.
A little more info about my motivation. I want to use LittleGPTracker in combination with a little OLED display, which is connected by I2C. After a little source code tweak (not related to this topic) I was able to compile the tracker.
The error messages I have to fix when starting LittleGPTracker are:
RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (hw:0,1), Device or resource busy.
RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (hw:0,2), Device or resource busy.
LittleGPTracker has a makefile designed for RPi hardware, but it seems like it can’t deal with a real-time Raspbian. Here is the link to the source code .