[sdiy] Waveform phases and hard sync, sawtooth vs. triangle?

[Mattias Rickardsson]

On Sat, 23 Jun 2018 at 23:11, <rsdio at audiobanshee.com> wrote:

>
> Considering the original goal - to reduce the discontinuity at the point
> of sync - reversing the direction of the triangle is the ultimate solution.
> It has no first order discontinuity (although it does have a second order
> discontinuity). It’s a lot better than merely cutting the discontinuity in
> half.
>

True, no discontinuity if used in ordinary audio-rate oscillator sync,
which makes it unique especially for the continuous triangle waveform - but
it has a discontinuity if it's the start of a sound (Note-on sync). Another
issue, what happens after the sync is completely unknown (if you don't know
what was happening before), so it's not deterministic in the way that can
be needed with note-on sync.


> I’d certainly like to hear what hard sync sounds like with a triangle core
> VCO that reverses direction in response to sync pulses.
>

I wouldn't really call it hard sync... flip sync is a nice term but at the
same time hard/soft should mean if it's syncing *always* or just when the
full period has almost passed... so "soft sync" & "hard sync" should
indicate *when* it syncs and "flip sync" & "reset sync" could be words
indicating *how* it syncs? Combining these we end up with 4 different sync
types. :-)

/mr
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