On Wed, Dec 05, 2012 at 12:18:03AM -0000, 7yash wrote:
Even in assembler, it's a struggle to generate more than two bandlimited oscillators on a 16MHz AVR8. They're just not fast enough. A better choice would be an ARM processer like maybe an STM32 - 32-bit processor, hardware arithmetic, more registers and the slowest ones clock up to 24MHz. They're even surface-mount so they're easier to work with than nasty messy through-hole parts.
I'd lay money down on most people who harp on about how incredible analogue filters are being unable to tell the difference between analogue and a semidecent digital implementation ;-)
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Gordonjcp MM0YEQ
> --- In korgpolyex@yahoogroups.com, Gordon JC Pearce <gordon@...> wrote:The Arduino is programmed in C++. Processing is something completely different - Java-based, but sharing a similar-looking IDE.
> > You'd struggle to get four oscillators out of a 16MHz AVR, particularly
> > if you want them bandlimited (and you *do* want them bandlimited).
>
> Then use a faster one or do as Olivier GIllet did with an Atmel and re-program using C++ instead of Processing on the Arduino.
Even in assembler, it's a struggle to generate more than two bandlimited oscillators on a 16MHz AVR8. They're just not fast enough. A better choice would be an ARM processer like maybe an STM32 - 32-bit processor, hardware arithmetic, more registers and the slowest ones clock up to 24MHz. They're even surface-mount so they're easier to work with than nasty messy through-hole parts.
> > Why? If you're going down the softsynth route, do the filter on theThe filter is okay, but nothing special - it's a plain ordinary four-pole OTA design. Switching between 12dB and 24dB per octave would have been nice to have as standard ;-)
> > computer as well.
>
> No, that's besides the point: you already have a great filter in the Korg. We're modding an existing paraphonic whose limitation is the OSC sections - there's nothing wrong with the filter - it's a fantastic filter.
I'd lay money down on most people who harp on about how incredible analogue filters are being unable to tell the difference between analogue and a semidecent digital implementation ;-)
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Gordonjcp MM0YEQ