Stereo quantization also made more generic
Stereo quantization also made more generic

mumble-voip/celt-0.11.0,oneman/opus-oneman,Distrotech/celt,dezelin/celt,dezelin/celt,dezelin/celt,oneman/opus-oneman,Distrotech/celt,Distrotech/celt,oneman/opus-oneman,mumble-voip/celt-0.11.0,mumble-voip/celt-0.11.0