It seems that I suddenly lost the stereo sound when I got my guitar into Zynthian.
It worked fine with ADC left and right inputs to VINL2[SE]+VINL1[SE] and VINR2[SE]+VINR1[SE] respectively, as usual but then I deleted the chain and created a new one and now I can only hear sound from either L or R in my headphones when I plug the guitar in L or R respectively. The sound is stereo when I am playing with synth engines. I tried rebooting with no success. Does anyone have an idea of how I can fix this?
Audio input to Zynthian is stereo or dual mono, i.e. anything plugged into the left input will appear on the left channel. You can create a dual mono presentation of a mono input, i.e. get the left input to appear on both channels by deselecting the right channel in the “Audio Capture” menu within the “Chain Options” menu, i.e.
From mixer or control view, bold press SELECT to show “Chain Options”
Highlight “Audio Capture” then press SELECT
Highlight the channel you want to disable then press SELECT to toggle its selection
Zynthian audio router will route the enabled audio (capture) inputs to the chain thus:
If only one selected then it is fed to both channels of the chain
If more than one is selected then odd selected inputs are fed to the chain’s left input and even selected inputs are fed to the chain’s right input
A standard Zynthian with just two audio inputs will allow left to both, right to both or left to left and right to right. A device with a multiport audio interface, e.g. USB soundcard with more than two audio inputs will use the odd/even distribution described above.