turnon

Activate an instrument for an indefinite time.

Syntax

turnon insnum [, itime]

Initialization

insnum -- instrument number to be activated

itime (optional, default=0) -- delay, in seconds, after which instrument insnum will be activated. Default is 0.

Performance

turnon activates instrument insnum after a delay of itime seconds, or immediately if itime is not specified. Instrument is active until explicitly turned off. (See turnoff.)

Examples

Here is an example of the turnon opcode. It uses the files turnon.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 turnon.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

; by Stefano Cucchi 2020 and Richard Boulanger

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

gasend1 init 0
gasend2 init 0

turnon 100
turnon 101

instr 1

abar barmodel 2, 2, p4, 0.000001, 0.0103, 20, p5, p6, p7
kenvelope expseg 1, p3, .01
abar = abar * kenvelope * p8
; NO local output

gasend1 = gasend1 + abar*p8
gasend2 = gasend2 + abar*p8

endin


instr 2

idenStart = p4
kdensity expseg p4, p3, 0.001
apulse mpulse 1, kdensity
kenvelope expseg 1, p3, .001
apulse = apulse * kenvelope * p5
; NO local output

gasend1 = gasend1 + apulse
gasend2 = gasend2 + apulse

endin


instr dry

idryLeft = p4
idryRight = p5
kgate adsr .01,.01,1,0
outs (gasend1*kgate) * p4, (gasend2*kgate) * p5

endin


instr 100

aphaser phaser1 gasend1, 4700, 1000, -0.8
arevphaser reverb aphaser, 1.618
outs arevphaser * 0.2, arevphaser * 0.2
clear gasend1

endin


instr 101

afold fold gasend2, 26
adelfoldL multitap afold, 0.62, 0.52, 1.19, 0.44
adelfoldR multitap afold, 0.94, 0.64, 1.42, 0.54
outs adelfoldL * 0.5, adelfoldR * 0.5
clear gasend2

endin

</CsInstruments>
<CsScore>



i2 0 6 .07  1

i "dry" 0 2 .87 .2

i1 3 4 10 0.13 300 0.3 0.8

i2 7 5 .007  1

i "dry" 7 3 .12 .86

i1 11 9 09 0.09 400 0.23 0.78

i2 15 9 .01 1


i "dry" 15 12 .94 .09


s


i "dry" 0 26.9 .68 .48 ; lowered

i 2 0.0 4 .07  1
i 2 0.1 4 .02  1

i 1 0.21 1 08 0.13 300 0.3 0.8 
i 1 2 2 14 0.02 500 0.2 0.7 

i 2 2 5 .06  0.8 ; lowered
i 2 4 5 .05  0.7 ; lowered
i 2 4 6 .01  0.6 ; lowered


i 1 4.3 3 9 0.08 1145 0.1 0.5 ; lowered
i 1 4.5 3 11 0.10 245 0.2 0.4 ; lowered

i 1 8.00 7 08 0.11 125 0.1 0.6
i 1 8.01 6 28 0.13 280 0.3 0.8
i 1 8.02 5 39 0.02 600 0.2 0.7
i 1 8.03 4 39 0.02 600 0.2 0.7

i 2 8.24 18 .09 1
i 2 8.75 11 .05 1
i 2 8.99 4 .01 1



i 1 18 9 8.1 0.12 105 0.12 0.56
i 1 18.01 8 8.8 0.13 205 0.52 0.46

i 1 18.02 7 8.2 0.15 745 0.42 0.26
i 1 18.03 11 8.3 0.14 905 0.62 0.36

i "dry" 25 .85 .32 .38

i 2 25 5 .71 1

i "dry" 27 .74 .62 .68

i 2 27 6 .11 1

i "dry" 32.3 .42 .32 .38

i 2 32.3 14 .005  1


i 1 36 13 9.9 0.233 333 0.23 0.63
i 1 39 12 8.9 0.323 403 0.34 0.53
i 1 42 10 7.8 0.123 283 0.42 0.73

i 1 48.01 9 8.11 0.122 108 0.13 0.54
i 1 48.03 8 8.82 0.135 208 0.50 0.44
i 1 48.05 7 8.23 0.158 748 0.40 0.24
i 1 48.08 11 8.35 0.147 908 0.60 0.34

e 60 ; score extended to allow for reverb and multitap tails to ring out

; keeping instr 100 and instr 101 "turned on" for 60 seconds

</CsScore>
</CsoundSynthesizer>

See also

Duration Control Statements