Concatenating frames from onFrameProcessed callback does not work as expected

[Oudwins]

Trying to manually implement some real time features I realized that when I concat all the frames from onFrameProcessed the resulting audio is quite bad.

My current theory is that this package, under the hood, merges frames with a sliding window approach. So just concatenating the frames causes echo and in general bad audio.

It would be nice to at least have some documentation on this. If I knew how much of the previous frame each frame has I can reconstruct the audio and implement the real time features I want on top of the library