sandpaper — Semi-physical model of a sandpaper sound.
sandpaper is a semi-physical model of a sandpaper sound. It is one of the PhISEM percussion opcodes. PhISEM (Physically Informed Stochastic Event Modeling) is an algorithmic approach for simulating collisions of multiple independent sound producing objects.
iamp -- Amplitude of output. Note: As these instruments are stochastic, this is only a approximation.
idettack -- period of time over which all sound is stopped
inum (optional) -- The number of beads, teeth, bells, timbrels, etc. If zero, the default value is 128.
idamp (optional) -- the damping factor, as part of this equation:
damping_amount = 0.998 + (idamp * 0.002)
The default damping_amount is 0.999 which means that the default value of idamp is 0.5. The maximum damping_amount is 1.0 (no damping). This means the maximum value for idamp is 1.0.
The recommended range for idamp is usually below 75% of the maximum value.
imaxshake (optional) -- amount of energy to add back into the system. The value should be in range 0 to 1.
Here is an example of the sandpaper opcode. It uses the file sandpaper.csd.
Example 918. Example of the sandpaper opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o sandpaper.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 idmp = p4 a1 line 2, p3, 2 ;preset amplitude increase a2 sandpaper 1, 0.01, 128, idmp ;sandpaper needs a little amp help at these settings asig product a1, a2 ;increase amplitude outs asig, asig endin </CsInstruments> <CsScore> i1 0 1 0.5 i1 + 1 0.95 e </CsScore> </CsoundSynthesizer>