I wasn't able to find exact issue I'm having on the same distro that was recent. sonic-pi doesn't seem to output any audio on my system. Example: print "test"; play 70; yields no audio. Print output:


=> Tuesday 5th July, 2016

=> 01:50, EEST

=> Hello, it's lovely to see
   you again. I do hope that
   you're well.

=> v2.10 Ready...

=> Studio: Initializing...

=> Starting run 1

=> Completed run 1

=> Starting run 2

{run: 2, time: 0.0}
 ├─ test
 └─ synth :beep, {note: 70.0}

=> Completed run 2```

Logs:

==> debug.log <==

==> gui.log <== [GUI] - using default editor colours [GUI] - shutting down any old audio servers... [GUI] - starting UDP OSC Server on port 4558... [GUI] - UDP OSC Server ready and listening [GUI] - booting live coding server [GUI] - waiting for server to boot... . [GUI] - server successfully booted. [GUI] - waiting for server to connect... [GUI] - server connection established [GUI] - loading workspaces

==> scsynth.log <==

Starting SuperCollider 2016-07-05 01:53:30

JackDriver: client name is 'SuperCollider' SC_AudioDriver: sample rate = 48000.000000, driver's block size = 1024 SuperCollider 3 server ready. JackDriver: max output latency 21.3 ms exception in GrafDef_Load: UGen 'Decimator' not installed. while reading file '/usr/share/sonic-pi/synthdefs/compiled/sonic-pi-fx_bitcrusher.scsyndef' exception in GrafDef_Load: UGen 'MdaPiano' not installed. while reading file '/usr/share/sonic-pi/synthdefs/compiled/sonic-pi-piano.scsyndef'

==> server-errors.log <==

==> server-output.log <== Sonic Pi server booting... Using protocol: udp This is Sonic Pi v2.10 running on linux with ruby api 2.3.0. Sonic Pi Server successfully booted.



From what I see there the exceptions present don't seem to be severe enough to cause simple beep to not be able to be played.

sonic-pi-net / sonic-pi

No audio on Antergos #1320

Starting SuperCollider 2016-07-05 01:53:30