Hello, we'd like to integrate a 4-channel beam-forming/noise suppression/echo cancellation module in PulseAudio's AEC framework the idea is to have a audio source with 4 channels, process that, and pass a mono stream to the application (some VoIP, hands-free client); the application plays a mono stream we found some issues in the PA AEC code due to the asymmetric nature of the processing (4 channels in, 1 channel out); please consider the patches posted the biggest modification is a proposed change to the modules' pa_xxx_ec_init() call: we suggest to replace the parameter blocksize with a parameter nframes -- blocksize is ambiguous if source and sink have a different number of channels; however, the number of frames is still the same in the asymmetric case we'll follow up with dummy/null implementation of a 4-channel AEC module BTW, let me introduce Stefan who did most of the work! thanks, regards, p. -- Peter Meerwald +43-664-2444418 (mobile)
