[sdiy] Sampler mode...

[Sean Ellis]

I'm watching this thread closely, I would love a small desktop sampler with 
the same functionality as my beloved s-612.

>
> That requires advance knowledge of where the zero crossings are.
>

Maybe I'm missing something but what would be the problem with forcing the 
first sample to zero in all cases? The feature could be switchable but 
having a value other than zero for the first sample is undesirable other 
then for special effects IMO.


----- Original Message ----- 
From: "ASSI" <Stromeko at nexgo.de>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, November 18, 2008 10:24 PM
Subject: Re: [sdiy] Sampler mode...


> On Dienstag 18 November 2008, Seb Francis wrote:
>> Well, from the point of view of the sample start point, a short
>> attack phase would eliminate any clicking, but for looping points
>> it is much more desirable to quantise to the zero-crossings as you
>> suggest.
>
> That requires advance knowledge of where the zero crossings are.
>
> [...]
>> In actual fact it would
>> be better to search for the 'next' rather than 'nearest'
>> zero-crossing otherwise it doubles the number of SRAM reads
>> necessary.
>
> I can't see this happening in your setup, you would probably need less
> read bandwidth and CPU cycles just reading two streams at the splice
> point and crossfade them.
>
>> It's doable, but some hysteresis of the CV inputs would be
>> important otherwise any ADC noise will burn lots of CPU time in
>> looking for nearest zero-crossings when the CV didn't really
>> change.
>
> Then there's the insignificant problem of what should happen when you
> change the loop point while you are actually doing the splice...
>
>
> Achim.
> -- 
> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk]>+
>
> Factory and User Sound Singles for Waldorf rackAttack:
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