| Wow, ok, thanks a lot for that explanation!
Like this it works now:
<CsoundSynthesizer> <CsInstruments>
sr = 44100 0dbfs = 1 nchnls = 1 ksmps = 32
ga_tester init 0 giramp = .01 instr 10 p3=giramp ga_tester linseg 1-p4, p3-1/kr, p4, 1/kr, p4 endin instr 81 asine poscil 1, 200 aout = asine * ga_tester printk 0, k(ga_tester ) out aout endin
</CsInstruments> <CsScore> i10 1 1 1 i10 3 1 0
i81 0 5 </CsScore> </CsoundSynthesizer>
________________________________
Prof. Maximilian Marcoll Studio Director Studio for Electroacoustic Music (SEAM)
University of Music Franz Liszt Weimar
Bauhaus University Weimar
On 28. Feb 2025, at 18:48, vlz <viclazzarini@GMAIL.COM> wrote:
ah, ok but ga_tester does not change, it is the same block of ksmps that was last generated. The block may not have a single value sample, but a ramp, and that's what you see oscillating. The way to guarantee a single value at the end is to make sure the envelope stops ramping up before the instrument stops generating it.
Prof. Victor Lazzarini Maynooth University Ireland Hi!
I am afraid that doesn't illustrate the issue for me because the “weird oscillation” happens over exactly one k-cycle so that at every prrink-readout the values are ok. ksmps = 1 solves the issue (but is not possible in my situation).
This is what the signal looks like after supposedly going back to zero:
________________________________
Prof. Maximilian Marcoll Studio Director Studio for Electroacoustic Music (SEAM)
University of Music Franz Liszt Weimar
Bauhaus University Weimar
On 28. Feb 2025, at 17:27, Victor Lazzarini <000010b17ddd988e-dmarc-request@LISTSERV.HEANET.IE> wrote:
The value of ga_tester is steady here, tested on 6.18. Can you give printout showing the issue? You can add printk 0, ga_tester to instr 81.
Prof. Victor Lazzarini Maynooth University Ireland On 28 Feb 2025, at 16:05, Maximilian Marcoll <maximilian.marcoll@hfm-weimar.de> wrote:
Hi! That’s exactly what I expected, but for some reaaon in my case ga_tester is oscillating rather weirdly all the time. I went back to 6.18 to see if there’s any difference but there isn’t.
M
________________________________
Prof. Maximilian Marcoll Studio Director Studio for Electroacoustic Music (SEAM)
University of Music Franz Liszt Weimar
Bauhaus University Weimar
On 28. Feb 2025, at 16:51, Victor Lazzarini <000010b17ddd988e-dmarc-request@LISTSERV.HEANET.IE> wrote:
Adding a printk, I see ga_tester climbing to 1 after 1 sec, staying at that value, then climbing down to zero, as expected. I hear it too. ======================== Prof. Victor Lazzarini Maynooth University Ireland On 28 Feb 2025, at 15:32, Maximilian Marcoll <maximilian.marcoll@HFM-WEIMAR.DE> wrote:
Hi everyone :)
I have a situation in which my global a-variables don’t behave as I expected them to.
I’m sure I might misunderstand some aspect of their general behaviour, maybe someone can help?
In the following example, instr 10 is creating a ramp to either 1 or 0.
I need the variable ga_tester to stay on its value until the next time instr 10 is being called.
Alas, it doesn’t. In fact, it changes all the time.
What am I missing here?
<CsoundSynthesizer>
<CsInstruments>
sr = 44100
0dbfs = 1
nchnls = 1
ga_tester init 0
giramp = .01
instr 10
p3=giramp
ga_tester linseg 1-p4, p3, p4
endin
instr 81
asine poscil 1, 200
aout = asine * ga_tester
out aout
endin
</CsInstruments>
<CsScore>
i10 1 1 1
i10 3 1 0
i81 0 5
</CsScore>
</CsoundSynthesizer>
________________________________
Prof. Maximilian Marcoll
Studio Director
Studio for Electroacoustic Music (SEAM)
University of Music Franz Liszt Weimar
Bauhaus University Weimar
http://seam.hfm-weimar.de/
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