Re: [Csnd] [EXTERNAL] Re: [Csnd] New UDO syntax question

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1

I think the problem is that the channel names are created at i-time and the loop runs at perf time.

Why don't you try first creating the array with the channel names - then using that in the k-rate loop. Don't put the sprintf() in the k-rate loop.

Prof. Victor Lazzarini
Maynooth University
Ireland

Hi there and hi Victor,

I'm afraid to have no other choice to continue this thread today about a problem yet simple.

I just want in order to set a given number of chnsetpfield value, string for name of the channel and after set all corresponding chnget in a udo whose the xout ouptut is a array of k values.

I guess this is an other story of i- and k- rate confusion and maybe a misunderstanding of chnset and chnget behavior such as chnsetiival\[\], \[\]Sname, kval[] chngetk Sname[], etc.

I test the following code both in a udp maxmsp context and in a python script/app using udp, the problem comes from chnget who are set on the same S_name... I can just control the last channel, in this case ctrlArr[4] corresponding to the amplitude of an oscil.

Here the code, out of udp context for test, with some comments which will be more telling than my words:

<CsoundSynthesizer>
<CsOptions>
-odac ;--port=7777
</CsOptions>
<CsInstruments>

sr = 48000
ksmps = 32
nchnls = 2
0dbfs = 1

opcode testn:i:k\[\]

npfield:i = n // number of pfields

ctrlArr:k[] = initnpfield
;S_chnstr:S = init1
bar:i[] = [1 ... npfield]

for j in [0 ... npfield-1] do
chnstr:S = sprintf&quot;%\.02f\_p%d&quot;, p1, bar\[j\]
;S_chnstr[j] = sprintf&quot;%\.02f\_p%d&quot;, p1, bar\[j\]
fieldvalue:i = pindexbar\[j\]
bar[j] = fieldvalue
chnsetbar\[j\],chnstr
;chnsetbar\[j\],S\_chnstr\[j\]
// use chnsetk, chnseti ?

ctrlArr[j] = initbar\[j\]
ctrlArr[j] = chngetchnstr
;ctrlArr[j] = chngetS\_chnstr\[j\]
//I guess here is the problem :
//all chnget are seted on the same Sname, in this case the last
// use chngetk ? Get an error linked to the previous chnset use

printj
printbar\[j\] // values of pfield
putschnstr,1 // names of channels
printk2ctrlArr\[0\] // values stored at index in a krate array
printk2ctrlArr\[1\] //
printk2ctrlArr\[2\] //
printk2ctrlArr\[3\] //
printk2ctrlArr\[4\] //
od

xoutctrlArr
endop

instr 1
ctrlArr:k[] = test5
asig = oscilctrlArr\[4\], ctrlArr\[3\]
outsasig,asig
endin

</CsInstruments>
<CsScore>
i 1 0 1 80 0.5
e
</CsScore>
</CsoundSynthesizer>

Thank you for your quick look, help and advice,

Best,

JB

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