The program ‘beep’ seems to run, but I don’t hear anything. Where is the sound going? If I want to do work with playing midi (PortMidi) is this possible too?
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To enable sound, you need to load a “dummy” sound card. You can do this with:
sudo modprobe snd-dummy
After doing so, you’ll notice that /proc/asound becomes populated:
$ ls /proc/asound
card0 cards devices Dummy modules pcm seq timers version
You’ll also want to install alsa-base as it is not included on Ubuntu Server by default:
sudo apt-get install alsa-base
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