marimba, vibes

  ar      marimba    kamp, kfreq, ihrd, ipos, imp, kvibf, kvamp, ivibfn, idec
  ar      vibes      kamp, kfreq, ihrd, ipos, imp, kvibf, kvamp, ivibfn, idec

Description

Audio output is a tone related to the striking of a wooden or metal block as found in a marimba or vibraphone. The method is a physical model developed from Perry Cook, but re-coded for Csound.

Initialization

ihrd -- the hardness of the stick used in the strike. A range of 0 to 1 is used. 0.5 is a suitable value.

ipos -- where the block is hit, in the range 0 to 1.

imp - a table of the strike impulses. The file "marmstk1.wav" is a suitable function from measurements, and can be loaded with a GEN01 table.

ivfn - shape of vibrato, usually a sine table, created by a function

idec - time before end of note when damping is introduced

Performance

kamp - Amplitude of note.

kfreq - Frequency of note played.

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

kvamp - amplitude of the vibrato

Example

  a1      marimba    31129.60, 440, 0.5, 0.561, 2, 6.0, 0.05, 1, 0.1
  a2      vibes      31129.60, 440, 0.5, 0.561, 2, 4.0, 0.2, 1, 0.1a1     
          outs       a1, a2

Author

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