Compiling PureData patches for BeagleRT¶

Getting everything up and running¶

Follow the following steps to get everything up and running on your Beaglebone Black:

1. Download the heavy-beaglert archive from https://code.soundsoftware.ac.uk/attachments/download/1543/heavy-beaglert_2015-07-17.zip

• Extract the archive (and remember where you extracted it to)

2. Make sure python is installed:

• If you are on windows, you will need a tool that allows you to use ssh and some other basic shell tools. The shell scripts in this project have been tested with mingw (http://mingw.org) . You will want to note that in order to paste code on the terminal you have to right click on the terminal's title bar and navigate the menu to edit->paste

• If not on Windows, type `which python` in a terminal window. If not installed, follow instructions here: https://wiki.python.org/moin/BeginnersGuide/Download

• Install the most up-to-date version of the requests python package (version 2.7.0). You can get it from http://docs.python-requests.org/en/latest/user/install/
  or typing the following in a terminal window (make sure it is not currently installed):

  On Linux/MacOS:
  curl -OL https://github.com/kennethreitz/requests/zipball/master && unzip master && cd kenneth* && sudo python setup.py install

  On Windows:
  curl -OL https://github.com/kennethreitz/requests/zipball/master && unzip master && cd kenneth* && python setup.py install

3. Create an account on enzienaudio.com:

• Go to http://www.enzienaudio.com

• Click Login on the top right corner of the page

• Create a new account

• Create a new patch and call it bbb (N.B. compiling won't work if you use a different name)

4. Make sure the Beaglebone is plugged in to laptop and open a terminal window:

• Navigate to the sh folder inside the heavy_beaglert folder you created earlier cd /path/to/beaglert_heavy/sh

• If on OSX/Linux, run ./setup-ssh.sh

• Or on Windows: ./setup-ssh-windows.sh

• when prompted for password enter letter 'a' (no quotation marks)

• ./send-project.sh

5. Compile your first project!

• ./upload-and-compile.sh -f ../pd/hello-world/

6. Create a new pd project

• Create a new folder inside the /pd directory

• The pd patch must exist in its own folder and be named _main.pd. You can use abstractions if you like.

Using analog ins/outs¶

• You can directly address the analog ins and outs from within PD (note that you have to compile and run the patch onto the BeagleBone to receive the data)

• Use the [adc~] and [dac~] objects to receive and send the data

• [adc~ 3] refers to Analog Input 0 (first two channels of [adc~] are audio inputs), likewise for [dac~]

• These inputs are sampled at audio sampling rate, so handle them as you would audio signals. (Use [snapshot~] if you want to turn them into control-rate values)

• See the example patches in the /pd folder for more information

Important notes¶

• Make sure you aren't using any unsupported objects. For list of objects go to https://enzienaudio.com/docs/pdobjects.html

• Pd patch must exist in its own folder and be named _main.pd. You can use abstractions if you like.

• See example pd patches for more information.

Have fun!