Security fixes/vulnerabilities
AOSP contributions: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
Improved Audio Quality
Assorted projects to increase audio quality for recording (e.g. 24 bit audio recording), or playback issues with multiple audio streams, distortion, and bugs with realtime effects.
AOSP contributions: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22
Safe Media Level
Audio compensation to ensure default mode will comply with safe levels headphone normative EN50332-2 and others.
AOSP contributions: 1, 2, 3, 4, 5, 6, 7, 8, 9
Time Stretch/pitch shifter.
Use the open source Sonic library as the default time-stretch mechanism for Android.
AOSP contributions: 1, 2, 3, 4
Logging
Assorted enhancements for logging and debugging instrumentation across the years
AOSP contributions: 1, 2, 3
Thanks for reading!
-Ricardo (rago)