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Csound Updated 2025-07-16
XML file format (but with 99% of the action of interest in a domain-specific language on the
CsInstruments and CsScore elements) that can be played and the reference implementation. Offers complex effects out-of-box apparently.Allows you to easily define instruments with seemingly arbitrary mathematical functions, and then use them to play notes at given time intervals.
The instrument functions can be parametrized, and each note played can have different parameters.
The instrument definition actually defines a block diagram graph, much like a hardware synthesizer would.
Csound is so not-bloated that it contains an UI system. And it includes an interactive virtual MIDI keyboard that interacts with parameter knobs: www.csounds.com/manual/html/MidiTop.html
But hey, it's fun. And like any other good domain-specific language, debugging it is barbaric of course.
If only it had been written in Python... the array manipulation boilerplate would be likely perfect for NumPy, and this would have been exactly what Ciro Santilli wanted!
CSound states that one of its design goals is backward compatibility, and it shows. Some of the stuff is utterly arcane, e.g. you have to remember what
GEN10, GEN11, etc. mean instead of having named enums.It just worked on Ubuntu 20.04 no questions asked:which runs this file: github.com/csound/csound/blob/92409ecce053d707360a5794f5f4f6bf5ebf5d24/examples/xanadu.csd and this plays a relly cool sound demo:
sudo apt install csound
git clone https://github.com/csound/csound
cd csound
git checkout 92409ecce053d707360a5794f5f4f6bf5ebf5d24
csound examples/xanadu.csdSave to file instead of playing:or direct ogg output:or pipe to stdout to FFmpeg TODO: stackoverflow.com/questions/64970503/how-to-pipe-csound-output-to-ffmpeg-for-conversion-without-an-intermediate-file
csound -o xanadu.wav xanadu.csdcsound --ogg -o xanadu.ogg xanadu.csdTODO find the most amazing set of songs made with it on GitHub? Some examples:
- www.csounds.com/toots/index.html has a good 101 on instrument design
- Csound FLOSS manual
- iainmccurdy.org/csound.html about 100 CC BY-SA examples. Each is a minimal study showing a specific technique, not a full composition, some seem advanced. Dude's a beast.
- github.com/csound/csound/tree/f2e70825fb543a6b15011c6984371f61ab2a00dd/tests/soak in-tree minimal examples
- github.com/csound/manual/tree/4049b286493d972ff7248b5596e47e7ae97a0cf9/examples contains the examples for the manual which is rendered at: It's insane, but it's fun! Ah those newbs who separate manuals from main tree.
- linuxsynths.com/CsoundPatchesDemos/csound.html on LinuxSynths
- github.com/csound/examples/tree/ae578159328178142c1055c7f78e28b42eb29774/csd as a few dozen examples
- freaknet.org/martin/audio/csound/ 10 pieces with source
Documentation-wise, it's a bit lacking. The only dude who can explain it really well, Dr Richard Boulanger, made the "The Csound Book" closed source, so, congrats, this will forever hurt the popularity of Csound.
Examples:
- csound/sine.csd
- csound/amplitude_frequency.csd
- csound/linen.csd: simple attack/release envelope, documented at: www.csounds.com/manual/html/linen.html
- csound/chorus.csd: chorus effect
- csound/bend.csd: bend using
linseg - csound/vibrato.csd
- csound/crossfade_generators.csd
- csound/table.csd
- csound/virtual_keyboard.csd
Cult leader Updated 2025-07-16
As mentioned at: cirosantilli.com/china-dictatorship/falun-gong#christine-marie Ciro Santilli considers this a synonym for "Prophet".
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