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ampmidi

Get the velocity of the current MIDI event.

Syntax

iamp = ampmidi(iscal [, ifn])

iamp ampmidi iscal [, ifn]

Initialization

iscal -- i-time scaling factor

ifn (optional, default=0) -- function table number of a normalized translation table, by which the incoming value is first interpreted. The default value is 0, denoting no translation.

Performance

Get the velocity of the current MIDI event, optionally pass it through a normalized translation table, and return an amplitude value in the range 0 - iscal.

Examples

Here is an example of the ampmidi opcode. It uses the file ampmidi-modern.csd.

Example of the ampmidi opcode.
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<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac  -M hw:1,0   ;;;RT audio out
;-iadc    ;;;uncomment -iadc if RT audio input is needed too
; For Non-realtime ouput leave only the line below:
;-o ampmidi.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs =  1

instr 1  ;expects MIDI note inputs on channel 1
  amp:i = ampmidi(1)       ; scale amplitude between 0 and 1
  sig:a = poscil(amp, 220)
  print(amp)
  outs(sig, sig)
endin

</CsInstruments>
<CsScore>
;Dummy f-table for 1 minute
f 0 60

e

</CsScore>
</CsoundSynthesizer>

Here is an example of the ampmidi opcode. It uses the file ampmidi.csd.

Example of the ampmidi opcode.
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<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac     ;;;RT audio out
;-iadc    ;;;uncomment -iadc if RT audio input is needed too
; For Non-realtime ouput leave only the line below:
;-o ampmidi.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs = 1

instr 1  ;expects MIDI note inputs on channel 1

iamp    ampmidi 1       ; scale amplitude between 0 and 1
asig    oscil iamp, 220, 1
        print iamp
        outs  asig, asig

endin

</CsInstruments>
<CsScore>
;Dummy f-table for 1 minute
f 0 60
;sine wave.
f 1 0 16384 10 1

e

</CsScore>
</CsoundSynthesizer>

See also

Midi Converters

Credits

Author: Barry L. Vercoe - Mike Berry
MIT - Mills
May 1997