[Csnd] From white(?) noise to distinct sound
| Date | 2019-02-26 20:19 |
| From | "Jeanette C." |
| Subject | [Csnd] From white(?) noise to distinct sound |
Hey hey,
I have the following idea, but am doubtful about my technical approach.
Morph a complex sound source (sample, full orchestra) from static noise (of
some colour) to the original sound with its frequency spectrum, amplitude and
dynamics.
Reducing the bitrate goes somewhat towards the white noise and reduced
dynamics. Some compression might also help. I tried extreme settings with
compress, but didn't get anywhere close.
Any other idea how to get from complete mush back to full dynamic "original"?
Best wishes,
Jeanette
--
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| Date | 2019-02-26 20:38 |
| From | Bill Alves |
| Subject | Re: [Csnd] From white(?) noise to distinct sound |
Gradual randomization of grains?
Bill Alves
Professor of Music, The Claremont Colleges Harvey Mudd College 301 Platt Blvd. Claremont CA 91711 http://pages.hmc.edu/alves/ http://www.billalves.com/ |
| Date | 2019-02-26 21:13 |
| From | Oeyvind Brandtsegg |
| Subject | Re: [Csnd] From white(?) noise to distinct sound |
Yes bit depth reduction is a nice way of tearing the sound apart to noise. You can even do "fractional bit depth", so that you don't have to have the steps of transition from one integer bit depth to the next. Simple example below. And also doing amplitude modulation with a noise modulator can give gradual decomposition. You would then have a constant (at 1), modulated by a bipolar noise source, and multiply this with your audio signal. ;*************************************************** ; bit reduction ;*************************************************** instr 1 iamp = ampdbfs(p4) icps = p5 kBits line 8, p3, 1 ; bit depth kQuantize = round(powoftwo(kBits-1)) ; find number of discrete steps for this bit depth ; as we allow fractional bit depth we need to round this value too ; audio generator a1 oscili 1, icps, giSine aQuantize = round(a1 * kQuantize)/kQuantize ; quantize audio signal (bit reduce) outs a1*iamp, aQuantize*iamp ; output smooth sine wave (left), and bit reduced wave (right) endin ;*************************************************** Den tir. 26. feb. 2019 kl. 21:19 skrev Jeanette C. <julien@mail.upb.de>: Hey hey, Oeyvind Brandtsegg Professor of Music Technology NTNU 7491 Trondheim Norway Cell: +47 92 203 205 http://www.partikkelaudio.com/ http://crossadaptive.hf.ntnu.no http://gdsp.hf.ntnu.no/ http://soundcloud.com/brandtsegg http://flyndresang.no/ http://soundcloud.com/t-emp |
| Date | 2019-02-26 21:51 |
| From | "Jeanette C." |
| Subject | Re: [Csnd] From white(?) noise to distinct sound |
Thanks Oeyvind and Bill, I've given both granular synthesis and the
noise-modulation a try on top of variable bit reduction.
Thanks for the example code. It was good to check it against my own code and
find that my implementation was almost exactly the same. I never really
trusted that code, upto now.
Best wishes,
JKeanette
--
* Website: http://juliencoder.de - for summer is a state of sound
* SoundCloud: https://soundcloud.com/jeanette_c
* Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g
* GitHub: https://github.com/jeanette-c
* Twitter: https://twitter.com/jeanette_c_s
You are my summer breeze, my winter sun,
my springtime soul, my autumn touch of gold
(Britney Spears)
Csound mailing list
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Discussions of bugs and features can be posted here |