MIDI Control of an EKS Patch in PD

As detailed in the Faust intro [464], we create an 8-voiced MIDI synthesizer for pd as follows:

  faust -xml -a puredata.cpp -o eks_pd.cpp eks.dsp
  g++ -DPD -Wall -g -shared -Dmydsp=eks -o eks~.pd_linux eks_pd.cpp
  faust2pd -s eks.dsp.xml

The last line produces eks_pd.pd which can be loaded into pd. In addition to the basic three MIDI-control parameters (gate, freq, and gain), we have the following additional parameters that are brought out as sliders in pd:

• Brightness
• Decay time ()
• Dynamic level
• Pick position
• Pick angle (or direction)

Finally, there are some simply computed parameters associated purely with panning the output sound into the stereo field:

• Panning angle
• Spatial width

See Fig.D.10 and Fig.D.11 for details.

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written by Julius Orion Smith III
Julius Smith's background is in electrical engineering (BS Rice 1975, PhD Stanford 1983). He is presently Professor of Music and Associate Professor (by courtesy) of Electrical Engineering at Stanford's Center for Computer Research in Music and Acoustics (CCRMA), teaching courses and pursuing research related to signal processing applied to music and audio systems. See http://ccrma.stanford.edu/~jos/ for details.