A wrapper script making sonic-pi audible through PulseAudio
This script depends on the package 'pulseaudio-module-jack', sometimes called 'pulseaudio-jack' (for example on Arch Linux or Alpine Linux).
This is a wrapper script around sonic-pi. All options passed to this script will be passed on to sonic-pi. This script launches a dummy JACK server and wires up sonic-pi's audio output to PulseAudio. This is supposed to avoid common issues that arise from running JACK and PulseAudio on the same sound card while also keeping the configuration effort minimal. Additionaly, this allows to hear the sound of sonic-pi through any bluetooth speaker or headset if they are set up to work with PulseAudio.
Keep in mind that routing sound through PulseAudio is an extra step and that PulseAudio resamples loopback devices. As more computing needs to be done, audio issues can be possible depending on the hardware at hand.
On Arch Linux you can use the PKGBUILD to install this script to your system:
- Click
Code->Download ZIP - Unpack the file and open a terminal in that directory
- Run
makepkg --install
The script is supposed to be POSIX compliant.
To verify that everything looks as it should:
Launch pavucontrol and check that under the Input Devices tab there is an entry for JACK to PulseAudio and that under the Playback tab there is an entry for the Loopback from JACK to PulseAudio.
Make sure that the drop-down Show at the bottom of the pavucontrol window is set to the All * option if the entries don't show up. Also make sure that the volumes are turned up if the entries are there and there is still no sound.
After that launch qjackctl, open the Graph window and make sure that the JACK to PulseAudio node is wired up to the same output pins of the SuperCollider node that are connected to the playback plugs of the system node. These are the ones from which sonic-pi will output its sound.
If you don't want to install qjackctl you can also check that jack_lsp -c lists the following connections (the order is irrelevant and additional connections can be ignored):
system:playback_1
SuperCollider:out_1
system:playback_2
SuperCollider:out_2
SuperCollider:out_1
system:playback_1
JACK to PulseAudio:front-left
SuperCollider:out_2
system:playback_2
JACK to PulseAudio:front-right
JACK to PulseAudio:front-left
SuperCollider:out_1
JACK to PulseAudio:front-right
SuperCollider:out_2
If anything did not look as expected open an issue about it.