IssueTracker

Using the qemu2 emulator it is not possible to disable audio via the command line parameters described with 'emulator -help' or in the emulator docs [1]. To disable audio in the emulator I needed to set the environment variable 'QEMU_AUDIO_DRV=none'. I also checked the 'command-line-and-environment.txt'-file for the running emulator and no QEMU-env was set.

There seems to be a (fixed) bug (37095924 [2]) with a referenced fix. But it looks like this fix was not moved from the qemu-android to the qemu repository (assumption: maybe because the fixed vl.c is not present in the qemu repo (only vl-android.c))

Android Studio Version: 2.3.3
Emulator Version: 26.1.3-4205252
HAXM / KVM Version: KVM 4.11.11 (debian kernel)

Android SDK Tools: 26.0.2
Host Operating System: Debian unstable (up-to-date), Kernel 4.11.11-1
CPU Manufacturer: Intel

Steps to Reproduce Bug:
1. Start the emulator with additional '-no-audio' and/or '-noaudio' and/or '-audio none' option
2. Open 'Settings'-App -> Sound -> 'Phone ringtone' -> select a different ringtone

Expected Behavior:
- No sound at all

Observed Behavior:
- Ringtone sound is audible

[1] https://developer.android.com/studio/run/emulator-commandline.html
[2] https://issuetracker.google.com/issues/37095924