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<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 alpass.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Initialize the audio mixer.
gamix init 0
; Instrument #1.
instr 1
; Generate a source signal.
a1 oscili 30000, cpspch(p4), 1
; Output the direct sound.
out a1
; Add the source signal to the audio mixer.
gamix = gamix + a1
endin
; Instrument #99 (highest instr number executed last)
instr 99
krvt = 1.5
ilpt = 0.1
; Filter the mixed signal.
a99 alpass gamix, krvt, ilpt
; Output the result.
out a99
; Empty the mixer for the next pass.
gamix = 0
endin
</CsInstruments>
<CsScore>
; Table #1, a sine wave.
f 1 0 128 10 1
; p4 = frequency (in a pitch-class)
; Play Instrument #1 for a tenth of a second, p4=7.00
i 1 0 0.1 7.00
; Play Instrument #1 for a tenth of a second, p4=7.02
i 1 1 0.1 7.02
; Play Instrument #1 for a tenth of a second, p4=7.04
i 1 2 0.1 7.04
; Play Instrument #1 for a tenth of a second, p4=7.06
i 1 3 0.1 7.06
; Make sure the filter remains active.
i 99 0 5
e
</CsScore>
</CsoundSynthesizer>
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