An overdue update on my pattern language work.
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# two-minute-weekChris Maughan
08/15/2020, 11:05 AMI don't go into details in this short video, but the basic idea of the runtime is that I have a set of pipelines inside each pattern
pattern ->
notes << random << scale, notes << values, ....
amplitudes << values
Each pipe line can have several steps, and is a list so that each pattern can contain several groups of notes.
At resolve time, the C++ runtime evaluates the pattern completely for one full iteration. These notes are queued outside the audio thread, which receives them on a lock-free queue and plays them.
I'm still working hard on making the audio thread lock free, and other performance issues.
Chris Maughan
08/15/2020, 11:06 AMThe janet lang ends up generating pattern pipelines which are evaluated later.
I believe I can probably drop Ixi lang on top of the runtime; and I intend to try that soon. In the meantime I have bugs š
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Charlie Roberts
08/17/2020, 3:34 PMcool! is it easy to (algorithmically) transform existing patterns?
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Chris Maughan
08/17/2020, 4:51 PMIt should be once I add operators. In this form, it's a DSL which describes patterns, so you have a list of operators that can run on them such as 'delay, random,swing, etc.'. If you want more control, that really depends on how it is scripted. IxiLang doesn't need much control, just basic operations, but if you wanted something like extempore's more free form programmability then you would need a more complex pattern/music language.
I'm interested in research in those areas, but I'm more interested initially in having something simple that just works 'out of the box'.
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Charlie Roberts
08/17/2020, 4:53 PMyeah, I guess Iām thinking of things more like
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Chris Maughan
08/17/2020, 4:54 PMThat's simple enough; just a new pattern operator in the runtime. I've been thinking about trying to put Ixi lang on top of it, as an experiment.
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s-ol
08/20/2020, 11:07 AMReally nice! I wasn't aware until now you're using Janet for the scripting. Also, I see you mute patterns using '(pat!)', is that just a command that kills the old pattern and ignores the rest of its arguments?
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Chris Maughan
08/20/2020, 2:06 PMYes, that's right, just a command that accepts any number of args. I also have a starter-for-10 Ixi lang implementation, which I find far more intuitive for making music.
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