[sdiy] saw vs ramp, audible?

[Mattias Rickardsson]

On Thu, 19 Dec 2024 at 17:18, Donald Tillman <don at till.com> wrote:

> On Dec 19, 2024, at 12:04 AM, Mattias Rickardsson <mr at analogue.org> wrote:
>
>
>
>> Phase-correct waveforms are difficult for a sawtooth-core oscillator as
>> the triangle and sine are derived from the sawtooth at a 90 degree phase
>> difference; the triangle peak (90 degrees) is aligned with the sawtooth
>> retrace (0 or 180 degrees).
>>
>
> Also the triangle has its overtones in other phases than the square for
> instance, so there's no way of phase-aligning all the traditional waveforms
> saw/sqr/tri/sin and get all their overtone phases to match. But
> the triangle becomes a nice almost-half-circular waveform if you align them!
>
>
> Mellow waveforms, with 1/n^2 harmonic content, have harmonics that are
> naturally cosine-alined, while bright waveforms, with 1/n harmonic content,
> are naturally sine aligned.
>

Because the mellow ones are 1-pole filtered versions of the sine-aligned
bright ones, and thereby lagging 90 degrees in phase?
Perhaps the sine alignment is actually typical also in acoustic sound
sources... :-)

/mr
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