[sdiy] Synstack - Forth based audio DSL for STM32

[Sarah Thompson]

Forth cool is.

Forth-syntax weird is.

(-:

Sarah

On Thu, Feb 25, 2016 at 7:40 AM, Pete Hartman <pete.hartman at gmail.com>
wrote:

> Forth is a programming language.  Very low level but also very extensible,
> been around quite some time.
>
> There are notes on forth in the PDF that Karsten sent, to give you a
> flavor of it:
>
> https://cdn.hackaday.io/files/9374401057216/20160215-synstack.pdf
>
> Pete
>
>
> On Thu, Feb 25, 2016 at 8:33 AM, Chris Juried <cjuried at yahoo.com> wrote:
>
>> Hi Karsten,
>>
>> Can you explain Forth, please?
>>
>> Best,
>>
>> Chris
>> http://www.JuriedEngineering.com
>>
>> On Wed, Feb 24, 2016 at 7:22 AM, Karsten Schmidt
>> <info at toxi.co.uk> wrote:
>> Hi guys,
>>
>> I've been an interested reader/lurker on this list for the past few
>> months, but this is my first post :) Over the past year I've been
>> working on a number of STM32 based synth implementations with a view
>> of creating a Forth based audio DSL for embedded devices. Since Forth
>> is sitting in an interesting spot between compiled and interpreted
>> modes, it'll also be soon possible to do livecoding directly on the
>> device. But even without that, Forth is naturally fitting, as well as
>> sufficiently compact & highlevel to succinctly define stacks of DSP
>> operations (i.e. synths)
>>
>> I've started with an STM32F401 dev board, but meanwhile have focused
>> on the new(er) STM32F746-DISCO to also be able to generate UIs for the
>> synths.
>>
>> Audio samples:
>> https://soundcloud.com/forthcharlie/sets/stm32f4
>>
>> Project summary:
>> https://cdn.hackaday.io/files/9374401057216/20160215-synstack.pdf
>>
>> Project log:
>> https://hackaday.io/project/9374-stm32f4f7-synstack
>>
>> The current implementation is written in 95% portable C, but am in the
>> process of rewriting it in Asm to avoid the overhead of C calling
>> conventions (it will still be embeddable in C project though). The
>> Forth VM incl. a bunch of native audio operators is ~24KB, the core
>> dictionary (basically the system library, most of Forth is written in
>> Forth) adds another 8KB, but will grow to probably double that.
>>
>> I'm planning for an initial open source release in April, but just
>> wanted to share the project with you already. Furthermore, I hope it's
>> okay to do so here, I'll be running 2 workshops about this in April
>> too. Details are on my website...
>>
>> K.
>> --
>> Karsten Schmidt
>> http://thi.ng
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>
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