Currently only two audio sources (stereo pair) can be locked together. This means that inputs on audio interfaces with multiple inputs, such as the Behringer UMC404HD, may "drift" from each other if they are not part of a stereo pair or if they are part of different stereo pairs. Although the "drift" may only be in the millisecond range, for certain programming this can still be an issue and cause phasing mismatch between inputs.

This feature request is add a "buffer lock" between all audio inputs, regardless of input configuration, to prevent this issue from happening.