I use MODEP with this simple setup on a Raspberry Pi 3 model B
I use it to play bass lines with my midi keyboard. I use hifiberry DAC 2.0+ audio card overlay.
It work nice and the CPU load is under 50% as raccomanded.
Now i want to add some other effect to the sound but i found that if I add some other plugin like cabinet simulators as in this picture
the CPU load increase to 60-70 % and i hear some artifacts. I wonder if this is an hardware limit because i user Raspberry Pi 3B or if is some wrong setup. What is the max complessity a pedal board can be using the Pi 3B ? Do i need to buy the Pi 4B with 4 or 8 Gb ?
Tnx for help