Csound 30 Years Maynooth - Workshop Csound and Raspberry Pi

A workshop in working with Csound on the Raspberry Pi at the Csound 30 year celebration conference at Maynooth University 26th of November 2016

Workshop Instructions

How to log in to the Raspberry Pi:

Connect via ssh in the terminal:

ssh pi@cosmo1.local
pw: raspberry

Using a direct connection (ethernet cable) between your computer and the Raspberry Pi

OS X:

1. Connect an Ethernet cable between your computer and 
   Raspberry Pi - make sure the lights on the RPi Ethernet 
   port are lit (orange and green)
2. On your Mac, press the Apple logo in the top left corner 
   and choose "System Preferences..."
3. Press the "Sharing" icon
4. Select the "Internet Sharing" option
5. In the dropdown menu next to "Share your connection from", 
   select "Wi-Fi"
6. In the list next to "To computers using" check the box 
   next to "Ethernet" or Thunderbolt Ethernet" (depending 
   on what model your Mac is)
7. Check the box to the left of "Internet Sharing" (in the
   column named "On") to start Internet Sharing
8. You will get a message box displaying a warning - push 
   the "Start" button
9. Now open Finder and go to "/Applications/Utilities" and
   open the app called "Terminal"
10. In the terminal you type "ssh pi@cosmo1.local" ("pi" is
    the username we use to log on to the Pi and cosmo1.local 
    is the network name for this Pi. 
11. This should prompt you for a password to log on to the Pi. 
    The default password is "raspberry"
12. You should now be logged on to your COSMO ready to make
    some crazy sounds!

Windows: Download and use the Putty Software for Windows to login via ssh.

List Audio interfaces

aplay -l
aplay -L
speaker-test -c2	# Stereo Test

speaker-test -c2 -Dhw:0 # Onboard Soundcard
speaker-test -c2 -Dhw:1 # USB Soundcard/Cirrus Logic Card
  • Adjust the sound volume: alsamixer

Cirrus Logic Audio Card (CLAC)

The input and output channels of the CLAC can be turned on and off using the scripts provided in the following folder. This also allows to use the on-board microphone of the audio card, instead of the line-in connection.

ls CirrusLogic/bin/

To test audio output from Csound:

1. Connect speakers or headphones to the output of the COSMO 
2. Log in to the Raspberry Pi 
3. Kill any running instances of python/csound by typing 
   "killall python" 3 times
4. Type "cd cosmo-dsp"
5. Type "cd WorkshopTestFiles"
6. Type "csound audio-out-test.csd"
7. You should now here some decending sine tones coming from 
   the COSMO outputs
8. Press "Ctrl-C" (possibly twice) to stop Csound

To test audio input to Csound:

1. Connect an audio source to the input of the COSMO
2. Connect speakers or headphones to the output of the COSMO 
3. Log in to the Raspberry Pi 
4. Kill any running instances of python/csound by typing 
   "killall python" 3 times
5. Type "cd cosmo-dsp"
6. Type "cd WorkshopTestFiles"
7. Type "csound audio-in-test.csd"
8. The RMS amplitude value of the input is printed in the console
9. Press "Ctrl-C" (possibly twice) to stop Csound

The Cosmo Effects Library

see.. homepage

Use a midi interface using MIDI Controller Numbers

1. Type "cd cosmo-dsp/library"
2. Make a local copy of "midi_cc.inc" by typing 
   "cp midi_cc.in myMidi_cc.inc"
3. Type "nano myMidi_cc.inc" and put in your MIDI-Controller 
   CC values
4. "cp MidiCcExample.csd myMidiCcExample.csd"
5. Type
Written on November 25, 2016