Fix audio record pre-processing am: 6d7b330c27 am: 407aef91b8 am: b6a347a67f am: 945e06d5a2 am: 2a5e20405b am: 1148a857dc
am: afde4408ee

Change-Id: I8c874c2684525f203d4c8cbc8d17206b61eefd0d