[sdiy] [synth-diy] integer sample period oscillator

[Tom Wiltshire]

On 14 Feb 2014, at 02:56, Scott Nordlund <gsn10 at hotmail.com> wrote:
> The goal of this recording was to see how well it worked in a "real 
> world" scenario. Anecdotally I can report that it does make a big 
> difference. At one point while I was working on it, I wondered why 
> everything sounded so terrible... it turned out that I had changed the 
> sample rate from 48 kHz to 44.1 (or something like that) and hadn't re-initialized things to 
> account for it. So it was constraining notes to the wrong frequencies and everything had terrible aliasing. 
> 
> I need to record some better examples and write something a that's little more clear, but I've been too involved in other stuff lately. Writing is the tedious part that comes after I've already had all the fun, so it's easy to put off indefinitely. The only other info I have on this for now is in a gearslutz thread, which includes some samples: http://www.gearslutz.com/board/electronic-music-instruments-electronic-music-production/826280-taxonomy-early-digital-synthesizers.html I don't think it's really satisfactory, but it's all I have at the moment. It covers the math and everything, at least. 


http://www.gearslutz.com/board/electronic-music-instruments-electronic-music-production/826280-taxonomy-early-digital-synthesizers.html

That's an absolutely excellent coverage of a lot of the history, classic instruments, and techniques, Scott. And then you move on to how you'd go about doing something similar these days, using uP counters, or FPGAs, or whatever. Fascinating stuff.

Thanks,
Tom