@davidcummings808 check if input is just chosen to 1 or 2, not both. If its put on both 1 and 2 on input in app audio settings, there will be no sound. Use the same channel, input as you have connected your guitar. On output it can be sat on 1 and 2 as in stereo, but it cant be done with the input, it has to be put up in mono, either 1 or 2 channel in app audio setting.