[Csnd] betarand - parameter ranges and interaction issue
| Date | 2024-03-05 16:54 |
| From | "Jeanette C." |
| Subject | [Csnd] betarand - parameter ranges and interaction issue |
Hey hey,
I'm doing some work with betrand trying to shape certain random number ranges,
by adjusting the alpha and beta parameters.
I noticed that with higher values for both alpha and beta there is an issue.
Csound uses 100% CPU and a 2 second i-event does not stop.
With 6 for both alpha and beta it appears to work, with 7 it does not.
Is this an inherent limitation of the mahts behind betarand or a bug? I could
think of ways around it, if I have to, though this feels more ellgant.
Best wishes and thanks,
Jeanette
--
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| Date | 2024-03-05 19:16 |
| From | ST Music |
| Subject | Re: [Csnd] betarand - parameter ranges and interaction issue |
Hi Jeanette, FWIW I was able to somewhat replicate the issue although in this simple example with alpha/beta higher than approx. 9 or 10. <CsoundSynthesizer> <CsOptions> -odac </CsOptions> <CsInstruments> sr = 48000 ksmps = 32 nchnls = 1 0dbfs = 1 instr 1 iIdx = 64 while iIdx >= 0 do iBeta = betarand:i(1, 14, 14) print iBeta iIdx -= 1 od aSig = poscil(.3, 330) out aSig endin instr 2 aSig = poscil(.5, 220) out aSig endin </CsInstruments> <CsScore> i1 0 2 i2 0 8 </CsScore> </CsoundSynthesizer> Best, Scott On Tue, Mar 5, 2024, 11:54 a.m. Jeanette C. <julien@mail.upb.de> wrote: Hey hey, |
| Date | 2024-03-05 19:43 |
| From | "Jeanette C." |
| Subject | Re: [Csnd] betarand - parameter ranges and interaction issue |
| Attachments | betarand.csd |
Hi again,
thanks for your reply and the code Scott. I have attached my own testing code,
which uses betarand at k-rate. I find that with alpha and beta = 7 the code
will complete, but it takes approximately more than double the alotted 2
seconds. Alpha and Beta values are supplied in the score, but printed out for
every instrument call.
Currently, the instrument runs betarand at k-rate, calculating the minimum and
maximum values, to print them and the responsible alpha and beta in the last
cycle of the event. This is to gain a better understanding of the relationship
between the parameters and the resultant random values.
Best wishes,
Jeanette
--
* Website: http://juliencoder.de - for summer is a state of sound
* Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g
* Audiobombs: https://www.audiobombs.com/users/jeanette_c
* GitHub: https://github.com/jeanette-c
Make all the clouds disappear
Put all your fears to rest <3
(Britney Spears)
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Discussions of bugs and features can be posted here |