On Jun 12, 2013, at 9:24 AM, Tom Schouten wrote:

> On 05/30/2013 08:21 PM, Tom Schouten wrote:
>> On 05/30/2013 05:30 PM, John Clements wrote:
>>> On May 30, 2013, at 1:21 PM, Tom Schouten wrote:
>>> 
>>>> Hi List,
>>>> 
>>>> Here's a tiny experimental tool I've been working on the last couple of 
>>>> months:
>>>> http://zwizwa.be/rai/rai.html
>>>> 
>>>> It's mostly aimed at the music DSP world (sound synthesizers and effects) 
>>>> where feedback structures are very important, but it could be fairly 
>>>> generic in its use.  I tried to stay as close to Scheme as possible.
>>>> 
>>>> The basic idea is to use Racket as replacement for Matlab, i.e. to analyze 
>>>> algorithms specified in a high level format, and use it to generate 
>>>> dependency-free C or ASM code for deeply embedded targets.
>>>> 
>>>> Currently it can generate binary plugins for Windows VSTi, Pure Data and 
>>>> Jack Audio.
>>> This looks totally awesome.  Would you consider making a Racket Package out 
>>> of this? My fall class could definitely be interested.
>> 
>> 
>> Cool :)
>> 
>> Here's the package:
>> raco pkg install github://github.com/zwizwa/rai/master
>> That will run all the Racket code.
>> 
>> For the C code gen, the Makefile is the best point of entry.
>> Currently Linux only, and might need some tweaking.
>> 
> 
> added synth-lib.rkt basic synth kit and synth.rkt example synthesizer.
> 
> - envelopes
> - parameter control dezippers
> - parameter control scales (exponential, "squashed" exponential, ...)
> - SVF filter
> - supersaw osc
> - anti-aliased saw osc
> - saturation functions
> - FDN reverb tail
> 
> How I use it at this time, Linux + Pd:
> 
> make sp_host.pd_linux # build binary Pd wrapper
> pd sp_test.pd & # run Pd patch built around sp_host
> make livecode # continuously compile synth.rkt -> synth.sp binary module
> 
> then edit synth.rkt or any of its dependencies and the binary code running in 
> Pd will be updated, leaving state intact if the type didn't change.

Very cool.

If only my students weren't all running windows….

John


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