Description

Limits the number of allocations of an instrument.

Syntax

maxalloc insnum, icount

maxalloc Sinsname, icount

Initialization

insnum -- instrument number

Sinsname -- instrument name

icount -- number of instrument allocations

Performance

maxalloc limits the number of simultaneous instances (notes) of an instrument. Any score events after the maximum has been reached, are ignored.

All instances of maxalloc must be defined in the header section, not in the instrument body.

Examples

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

<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 maxalloc.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

maxalloc 1, 3	; Limit to three instances.
 
instr 1

asig oscil .3, p4, 1
     outs asig, asig

endin
</CsInstruments>
<CsScore>
; sine
f 1 0 32768 10 1

i 1 0 5 220	;1
i 1 1 4 440	;2
i 1 2 3 880	;3, limit is reached
i 1 3 2 1320	;is not played
i 1 4 1 1760	;is not played
e
</CsScore>
</CsoundSynthesizer>

Its output should contain messages like these:

WARNING: cannot allocate last note because it exceeds instr maxalloc
      

See also

Real-time Performance Control

Credits

New in Csound version 3.57