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Signal Generators: Waveguide Physical Modeling

wgbrass

  ar      wgbrass    kamp, kfreq, ktens, iatt, kvibf, kvamp, ifn[, iminfreq]
  

Description

Audio output is a tone related to a brass instrument, using a physical model developed from Perry Cook, but re-coded for Csound. [NOTE: This is rather poor, and at present uncontrolled. Needs revision, and possibly more parameters].

Initialization

iatt – time taken to reach full pressure

ifn – table of shape of vibrato, usually a sine table, created by a function

iminfreq – lowest frequency at which the instrument will play. If it is omitted it is taken to be the same as the initial kfreq. If iminfreq is negative, initialization will be skipped.

Performance


A note is played on a brass-like instrument, with the arguments as below.

kamp – Amplitude of note.

kfreq – Frequency of note played.

ktens – lip tension of the player. Suggested value is about 0.4

kvibf – frequency of vibrato in Hertz. Suggested range is 0 to 12

kvamp – amplitude of the vibrato

Example

    a1     wgbrass     31129.60, 440, 0.1, 6.137, 0.05, 1
           out         a1

Author

John ffitch (after Perry Cook)
University of Bath, Codemist Ltd.
Bath, UK
New in Csound version 3.47


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Signal Generators: Waveguide Physical Modeling