[sdiy] In praise of the ATM STM32F303

[Kylee Kennedy]

I guess there isn't a way to dump the contents of the Streichfett's STM32
chip's data to a computer to reverse engineer, learn how they programmed it?


Kylee

On Fri, Feb 12, 2016 at 10:06 AM, <rburnett at richieburnett.co.uk> wrote:

> Just watched the Streichfett teardown video, and it is very impressive
> what they've managed to squeeze out of that processor!!!
>
> Judging from some of the comments regarding aliasing on Muff Wiggler
> forum, I'd guess that it just uses naive software generated sawtooths
> without any particular measures taken to attenuate aliasing.  Or possibly
> just a tracking HPF filter to clean up the spectrum below the fundamental
> frequency like Adam Szabo found in his JP-8000 Supersaw analysis.  This is
> quite cheap to implement, particularly if you've got double-precision
> (32-bit) processing at hand...
>
> "I recently got a Streichfett, and I can also definitely hear a lot of
> nasty digital aliasing type sounds from the String section. There are a few
> sweet spots, but it still takes a decent EQ to reduce some of the unwanted
> sounds.
>  The Streichfett doesn't compare to any of the vintage string synths
>  I've played (Rolands and Elkas), and unless Waldorf updates the OS to
> clean up the aliasing I'll probably return it.
> The Streichfett lacks a low-pass filter and it sounds horrible in the
> highs (aliasing)."
>
> -Richie,
>
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