mute — Mutes/unmutes new instances of a given instrument.
insnum -- instrument number. Equivalent to p1 in a score i statement.
“insname” -- A string (in double-quotes) representing a named instrument.
iswitch (optional, default=0) -- represents a switch to mute/unmute an instrument. A value of 0 will mute new instances of an instrument, other values will unmute them. The default value is 0.
All new instances of instrument inst will me muted (iswitch = 0) or unmuted (iswitch not equal to 0). There is no difficulty with muting muted instruments or unmuting unmuted instruments. The mechanism is the same as used by the score q statement. For example, it is possible to mute in the score and unmute in some instrument.
Muting/Unmuting is indicated by a message (depending on message level).
Here is an example of the mute opcode. It uses the file mute.csd.
Example 241. Example of the mute 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
; Audio out Audio in No messages
-odac -iadc -d ;;;RT audio I/O
; For Non-realtime ouput leave only the line below:
; -o mute.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Mute Instrument #2.
mute 2
; Instrument #1.
instr 1
a1 oscils 10000, 440, 0
out a1
endin
; Instrument #2.
instr 2
a1 oscils 10000, 880, 0
out a1
endin
</CsInstruments>
<CsScore>
; Play Instrument #1 for one second.
i 1 0 1
; Play Instrument #2 for one second.
i 2 0 1
e
</CsScore>
</CsoundSynthesizer>