commit 47fe4515b23afaec4b0e3efed2c7cb0c8002a407
author Alden DSouza <aldend@google.com> Thu Jul 16 09:15:43 2020 -0700
committer Alden DSouza <aldend@google.com> Tue Jul 21 19:01:35 2020 -0700
tree fadfb5eb4a65762981df7479f2bacad757176bd3
parent 6a6d32aa374f440e2397bfe09956f0c8a51257b2

yukawa: Add loudspeaker equalization

This filter attenuates 200-400Hz by 18dB,
and some 6dB notch attenuation at 2.25kHz, 3.8kHz, 6.6kHz.

Full frequency response here: https://b.corp.google.com/issues/159714063#comment3

EQ can be disabled/modify at runtime with the following steps:

1. (Disable) Rename file /vendor/etc/speaker_eq_sei610.fir to a different name/ext.
   (Modify) Modify contents of /vendor/etc/speaker_eq_sei610.fir (max 512 taps).
2. Run 'killall audioserver' on device.

Bug: b/159714063
Test: Yukawa passed ART Eraser test.

Change-Id: I32ccb20c9fd1d6ff51086d93babbd9cf828edc0d