I’ve got my HiFIBerry DAC+ADC and I’ve been designing a new enclosure to make a guitar pedal. Here is my progress so far.
The Pi USB ports are pointing out the back. Power comes from a 9V pedal power supply and converted to 5V inside the box.
The left channel is used for the main guitar in and out. The right channel is used for the send/return jacks at the back of the enclosure. I’m hoping that the active buffer in the polytune will avoid any impedance issues with the direct guitar input.
There will be a stomp switch on the left for on/off, and one on the right for bypass. The pot in the middle modifies the output volume of the left channel.
I booted it for the first time yesterday and the output works fine, but the inputs are not showing up as alsa devices. My zynthian was running 4.14 kernel but I followed these HiFiBerry instructions to switch to their supported 4.18 kernel, but that didn’t seem to help
Is there anything I can do to get input working, or help out with the effort to add support for the HiFIBerry DAC+ADC?