[sdiy] Drum sample playback

[Quincas Moreira]

very cool! Let's make a Euro panel for it, who's game?

It does another thing that VST/Au cannot...  Function without a host
computer :)



On Sat, Feb 18, 2017 at 5:46 AM, Matthias Puech <matthias.puech at gmail.com>
wrote:

> Hi,
>
> Yes, it looks like an interesting little board. What is that impressive
> though?
> I didn't know about this particular codec, it could be handy in a module
> design. Now if I put aside SDIO throughput (which I don't know much about),
> it doesn't seem that surprising to be able to read 32 samples at the same
> time. We can already achieve 32+ linearly interpolated voices on an STM32F4
> (Cortex-M4 @ 200MHz) at 48kHz, and the M7 has far better performance
> (300MHz, better FPU) so there should be room for better interpolation (or
> more polyphony). Am I missing something?
>
> Best,
>     -m
>
> On Fri, Feb 17, 2017 at 11:45 PM, Richie Burnett <
> rburnett at richieburnett.co.uk> wrote:
>
>> 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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>
>
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-- 
Quincas Moreira
Test Pilot at VBrazil Modular
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