Since we always pass in the first audio channel, we should always pass 1 as the number of channels in the initialization function. Bug: webrtc:8732 Change-Id: I978edb125d7cc701a5e07193256327908be00560 Reviewed-on: https://webrtc-review.googlesource.com/69660 Commit-Queue: Ivo Creusen <ivoc@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22885}