[sdiy] Digital Modules

[Quincas Moreira]

Hi Busby,

I've a very mixed system in my Eurorack, so I can tell you about some of my
digital/hybrid modules.  Two of them use the Teensy, which is a more
powerful option to an Arduino. You can use the Arduino code and vast
library of projects, but it's a tiny board and way faster and more powerful
than a regular arduino. The modules I have that use it are the Ornaments
and Crime and the Radio Music/Chord Organ.  Olivier can correct me if I'm
wrong but the Mutable Instruments digital modules such as Braids, Elements
and Clouds, genreally use very powerful ARM processors, as does the
Axoloti.  Our own (VBrazil Modular) Modules by Vinicius Brazil use a
variety os DS PICs and are programmed in the chip's assembler for very
low-level programming. No OS to load or language to compile. Sample Rates
go up into the MHz so FM behavior between oscillators is as rich as analog.
As for ADC/DACs, some chips already have them inside, some don't. The
Ornament and Crime for example uses a
http://www.ti.com/lit/ds/symlink/dac8565.pdf
There's a lot you can do with an www.axoloti.com board too, which already
has everything inside, from high quality Stereo I/O and Midi I/O (including
USB and Din) analog ins and outs, and comes with a visual programming
language that is as intuitive as it gets. Similar to PD or Max.

Hope that helps
cheers!

On Mon, May 1, 2017 at 7:37 AM, cheater00 cheater00 <cheater00 at gmail.com>
wrote:

> Hi Busby,
> Look in the synth-diy archives online, there was recently a survey of dsp
> chips and eval boards that I have sent out.
>
> On Mon, 1 May 2017 13:45 Adrian Corston, <eidorian at aladan.net> wrote:
>
>> I don't really know an in-depth answer to your questions, but there has
>> been a fair bit of discussion here on the list about digital stuff and
>> the latest cool MCU options (that mostly goes way over my
>> substantially-analog head!)
>>
>> I will note that I've seen a few DIY projects that used the MCP4822
>> chip, which is a little cheap dual 12-bit D/A converter with SPI (but
>> getting a bit long in the tooth now though, so I'm sure there are better
>> options out there...)
>>
>> Cheers,
>> A.
>>
>>
>> On 1/05/17 8:59 PM, Busby Bergson wrote:
>> > Hi there, DIYers -
>> >
>> > I apologize if this is the wrong forum for this, but I've been curious
>> > about the rise of digital modules among modular synthesists.  I have a
>> > lot of very introductory questions, but I haven't managed to find an
>> > introduction to this stuff anywhere (does one exist?)...
>> >
>> > Are there standard DAC/ADCs that get used? If so, what are they? Or do
>> > people usually design their own?
>> > Are there simple "shields", such as in the microcontroller world, that
>> > handle basic digital audio processing? It seems like a Raspberry Pi
>> > would be able to do a bunch of this stuff out-of-the-box - but I'm not
>> > sure it is a real industry standard..
>> > If people here do this kind of work, what sorts of programming
>> > languages do you use?
>> >
>> > Thanks,
>> > BB
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-- 
Quincas Moreira
Test Pilot at VBrazil Modular
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