[sdiy] Drum sample playback

[Byron G. Jacquot]

So there's a little bit of a trick to that.  The pitch resampling happens per output stream, rather than per playback voice.

We're in the modern era, and fast flash memory is plentiful enough that we can easily have a sample per semitone, and not need to spread a single sample across intervals.

I had Cold Sweat, Funky Drummer and Amen all playing in synch on the prototype, and the shifting artifacts weren't too objectionable.


-Byron Jacquot

-----Original Message-----
>From: Richie Burnett <rburnett at richieburnett.co.uk>
>Sent: Feb 17, 2017 3:45 PM
>To: Synth Diy <synth-diy at synth-diy.org>, paula at synth.net
>Subject: Re: [sdiy] Drum sample playback
>
>That's impressive!
>
>It's usually the resampling that takes the majority of CPU cycles with sample playback. So for a given amount of CPU power you can either have tons of voices that alias like hell when you transpose the samples or a quarter of those voices with nice clean detuning of the samples. I suspect this is where they might have cut corners.
>
>Of course if you want to pitch up a Hi-hat sample and the playback module has crap resampling, then there's nothing to stop you transposing the sample in a decent audio processing package first before sticking it on the sd card.  (That's what I used to do with my old Akai S01 sampler that had crappy linear interpolation, and turned hi-hat samples into rustling paper bag sounds as soon as you touched the transpose control!)
>
>-Richie, 
>
>Sent from my Xperia SP on O2
>
>---- paula at synth.net wrote ----
>
>>OMG,
>>
>>anyone seen this?
>>
>>https://www.sparkfun.com/products/13810
>>
>>upto 32 samples playing back at the same time, built in MIDI, 8 outputs 
>>which can dynamically assign. Just WOAH
>>
>>Paula
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