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Signal Modifiers: Waveguides

streson

  
  ar      streson    asig, kfr, ifdbgain

An audio signal is modified by a string resonator with variable fundamental frequency.

Initialization

ifdbgain – feedback gain, between 0 and 1, of the internal delay line. A value close to 1 creates a slower decay and a more pronounced resonance. Small values may leave the input signal unaffected. Depending on the filter frequency, typical values are > .9.

Performance

streson passes the input asig through a network composed of comb, low-pass and all-pass filters, similar to the one used in some versions of the Karplus-Strong algorithm, creating a string resonator effect. The fundamental frequency of the "string" is controlled by the k-rate variable kfr.This opcode can be used to simulate sympathetic resonances to an input signal.

streson is an adaptation of the StringFlt object of the SndObj Sound Object Library developed by the author.

Author

Victor Lazzarini
Music Department
National University of Ireland, Maynooth
Maynooth, Co. Kildare
1998 (New in Csound version 3.494)


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Signal Modifiers: Waveguides