Tips for using the Valeton GP-200 guitar multieffects unit as an audio interface on Windows 11 and Linux (Ubuntu)

Device is not seen by Valeton GP-200 Windows desktop app

First, check that you have installed the latest ASIO audio driver and the latest version of the GP-200 app.

Then, go to the Global settings on the interface itself, and check that USB Mode is set to “Normal”, not “Legacy”

Valeton GP-200 is quiet under Linux but loud under Windows 10/11

(Install and) Alsamixer.

Use F6 to select the GP-200 audio device.

Set all three volume levels to max.