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

Change-Id: Iacb63a98cd98510a40f35733b9ffd2c8c4b3cec1