[sdiy] Harmonic bandwidth

Scott Gravenhorst music.maker at gte.net
Thu Jan 10 16:49:53 CET 2008


"Ben Lincoln" <blincoln at eventualdecline.com> wrote:
>On Thu, January 10, 2008 6:49 am, Scott Gravenhorst said:
>
>> It appears to me that more and better experiments are necessary.
>
>I agree. I also think this is really interesting! And I agree with your
>comment that it could still be a digital artifact. I didn't notice anyone
>suggest this yesterday, but would it be worth trying a modification to one
>of the sound-generation scripts which defines Pi as an arbitrary constant,
>so that inaccuracy there could be tested? (const double pi = 3.1;, etc).
>
>In terms of analogue sine wave oscillators, I have not built one yet (a
>kit or two is in my budget for next month), but I imagine there must be at
>least a couple of people on a DIY synth list that have 2 or more of them.
>How hard would it be to do a reliable phase offset?

At first thought, I'm wondering how one can ensure an absolute absence of phase drift
between two separate oscillators operating at different frequencies.  This is easy with
digital systems, but not so easy with analogue?  I'm not an analog electronics giant by
any means...

-- ScottG

-------------------------------------------------------------

-- Scott Gravenhorst
-- GateMan-III - FPGA Based Monophonic MIDI Synthesizer with SVF
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-- When the going gets tough, the tough use the command line.




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