Comment 5 for bug 1261666

While it is true that this will probably always be low demand, I think many find that webrtc produces (subjectively) nicer sounding results that the speex canceler. The difference in performance is especially pronounced when the input and output sound devices do not share the same clock source (such as when a USB mic is in use). Speex is known for not handling the resync when the clocks drift too far out of alignment as smoothly as webrtc does.

It would be nice to have some way of getting this functionality without having to build from source or other work-arounds.