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add example for nstance to clarify usage together with turnoff #624

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add example for nstance to clarify usage together with turnoff #624

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37 changes: 37 additions & 0 deletions examples/nstance.csd
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,40 @@ instr 2
endin


; ---------------------------------------------------------------
; nstance can be used to control the lifetime of a launched event


instr sineoscil
ifreq = p4
a0 oscili 0.1, ifreq
aenv linsegr 0, 0.1, 1, 0.1, 0
a0 *= aenv
outch 1, a0
endin

instr turnoff
iid = p4
prints "turning off id %d\n", iid
turnoff(iid)
endin

instr master
; event with a unique p1. Although isynth is a itime variable, at itime
; it has a value of 0!!. Only at performance time it turns valid

isynth nstance nstrnum("sineoscil")+0.01, 0, -1, 442

; At the very first cycle schedule a turnoff using the handle number,
; not the fractional p1. Notice that this operation needs to be done
; at performance time to have a valid handle
if timeinstk() == 1 then
ksynth = isynth
schedulek "turnoff", 2, 0, ksynth
endif
endin


</CsInstruments>
<CsScore>

Expand All @@ -42,6 +76,9 @@ f 1 0 16384 10 1
i 1 0 0.5
; Play Instrument #1 for half a second.
i 1 1 0.5

i "master" 0 10

e


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