enhance(main/cmus): enable ALSA output

[fukiame]

when paired with root, should enable bit-perfect playback with ALSA and bypass Android audio stack, useful for people who want that but do not want to / cannot use native android usb handover for e.g UAPP or Neutron Player

[robertkirkman]

It is an interesting idea, but I wondered, do you have a device where you can confirm that this is completely working?
The reason I would like to ask that is because, ALSA is rumored to be extremely difficult to use successfully in Termux all the way to audio playback (as opposed to some other audio APIs OpenSL ES, Pulseaudio, Portaudio, Miniaudio, Pipewire, JACK)
If so, could you include in your description a minimal example of the full commands necessary after installing this package, to set up and test the ALSA output on that particular device where it is working?

[TomJo2000]

Just gonna throw my "testing PRs" saved reply in here for instructions.

^{(This is a pre-written, saved reply.)}
If you want to test this PR please download the appropriate DEB package(s)
from the build artifacts of the associated PR's latest CI run.

After downloading the build artifact, make sure to unzip and un-tar it.

Detailed instructions, if needed.

# finding out what architecture you need
# architecture is just below the TERMUX_VERSION
termux-info

# e.g.
# [...]
# TERMUX_MAIN_PACKAGE_FORMAT=debian
# TERMUX_VERSION=0.118.0
# TERMUX__USER_ID=0
# Packages CPU architecture:
# aarch64
# [...]

# =======================

# make sure `unzip` and `tar` are installed using
pkg install unzip tar

# unzip the artifact (if you have a different architecture this might be arm, i686 or x86_64 instead)
unzip debs-aarch64-*.zip

# untar the artifact
tar xf debs-aarch64-*.tar

# You should now have a debs/ directory in your current working directory
# Install the packages from the local source using
pkg install -- ./debs/*.deb

# to clean up, you can remove the debs/ directory, .tar file and .zip file
rm -rfi debs debs-aarch64-*.zip debs-aarch64-*.tar

[fukiame]

It is an interesting idea, but I wondered, do you have a device where you can confirm that this is completely working? The reason I would like to ask that is because, ALSA is rumored to be extremely difficult to use successfully in Termux all the way to audio playback (as opposed to some other audio APIs OpenSL ES, Pulseaudio, Portaudio, Miniaudio, Pipewire, JACK) If so, could you include in your description a minimal example of the full commands necessary after installing this package, to set up and test the ALSA output on that particular device where it is working?

I can confirm that it's working, tested with my JadeAudio JA11 USB DAC
with it plugged in and identified via sudo aplay -l

sudo cmus
:set output_plugin alsa
:set dsp.alsa.device=hw:1,0 # 1,0 is my USB DAC

play music, check bitrate via card software, see proper bitrate changes

ALSA is rumored to be extremely difficult to use successfully in Termux all the way to audio playback

the hardest part of it would be to get root access, I do not yet know if there is a way to do so rootlessly, I assume that this is the norm for any ALSA usage, though, lmk if I'm wrong

[fukiame]

with cmus ALSA, see proper bitrate change in FiiO Control (an app to control my USB DAC)

versus a normal audio player in Android, staying at 48khz because of Android's resampling

[robertkirkman]

Good, thank you for showing how to use it.

[robertkirkman]

I will merge this in 24 hours from now if nobody has any problem with this.