[sdiy] Audio Weaver for ST Discovery boards -Free!

[paula at synth.net]

Scott,

agreed, it would be nice for them to include Audio CODECs, but I guess 
they're catering for mass markets (ethernet).

Paula

On 2017-05-11 15:46, Scott Gravenhorst wrote:
> Ah, thanks for that.  One thing that pisses me off a bit is that it's
> still too uncommon for dev
> boards (like this one) to have an on board audio codec.  Thankfully,
> the Discovery board does.  I
> would think in these days where every product out there has a screen
> and sound that it would be
> imperative to put at least an audio codec on the board.  The advantage
> for me is that when
> developing driver code for a codec, it's comforting to know that the
> codec being placed there by
> the mfr would seem to indicate that it _should_ work and that if
> there's a problem - it's your code.
> 
> I may purchase the SAM E70 board after looking at the datasheet, but I
> can see I'll have to
> jerry-rig a codec to some pins on the board - which will be SMD and
> having myopia plus presbyopia,
> that's a problem.  Perhaps there's a plug in board... (not with my
> luck)  I've not yet had luck
> coding I2S, but I can sharpen my chops on the Discovery board.  At
> least the E70 board isn't
> expensive at about $30usa.  I'll need to determine what the difference
> is between S70 and E70.  The
> S70 chip is the one used for the Tsunami Super WAV Trigger board.
> 
> paula at synth.net wrote:
>> Scott,
>> 
>>  You should take a look at this eval board for the SAM E70 -
>> 
>> https://www.digikey.co.uk/product-detail/en/microchip-technology/ATSAME70-XPLD/ATSAME70-XPLD-ND/5725743
> 
>> 
>>  has a nice fast M7 CPU and a big chunk of RAM too ;)
>> 
>> Paula
>> 
>> On 2017-05-11 12:30, Scott Gravenhorst wrote:
>>> Well, to be honest, I started looking at Microchip's (Atmel)
>>> ATSAMS70N20 which includes
>>> almost identical internal features.  It has a bit more internal RAM,
>>> but the datasheet
>>> says it runs up to 300 MHz.  The ARM on the 32F746GDISCOVERY board
>>> runs up to 216 MHz.
>>> However, I've not been able to find a dev board for the ATSAMS70N20.
>>> 
>>> So I have to say that this Discovery board is my second choice and
>>> will be a super-major
>>> step up from a dsPIC.  As for performance, I'll just have to see how
>>> much synth I can
>>> cram into it.  One interesting thing about both of the ARM ICs is 
>>> that
>>> they have a 2
>>> channel 12 bit DAC that runs up to 1 MHz sample rate which might be
>>> fun with naive
>>> waveforms since the Nyquist limit is 500 kHz.  I've worked with a 12
>>> bit DAC at that
>>> sample rate using an FPGA and I noticed no alias problems with naive
>>> waveforms.
>>> However, such a high sample rate will limit voice and feature count.
>>> 
>>> Anyway, I'll post about it once I've got a good feel for what it can
>>> do.  All I have
>>> right now is a bunch of PDF files.
>>> 
>>> Michael Zacherl <sdiy-mz01 at blauwurf.info> wrote:
>>>> 
>>>> On 11.May 2017, at 3:44 , Scott Gravenhorst <music.maker at gte.net>
>>>> wrote:
>>>> 
>>>>> I got some birthday money and bought this: 32F746GDISCOVERY
>>>>> =
>>>> 
>>>>> It looks pretty nice.  I will try Audio Weaver when the board comes
>>>>> here.
>>>> 
>>>> at this price ($49 really?) it looks like a steal!
>>>> How you=92d rank the cpu performance-wise?
>>>> Additional I/O via SPI? (still thinking dc-coupled audio rate A/D 
>>>> D/A)
>>>> 
>>>> --
>>>> http://mz.klingt.org
>>>> 
>>>> 
>>>> _______________________________________________
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>>> 
>>> -- ScottG
>>> ________________________________________________________________________
>>> -- Scott Gravenhorst
>>> -- http://scott.joviansynth.com/
>>> -- When the going gets tough, the tough use the command line.
>>> -- Matt 21:22
>>> 
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>> 
> 
> -- ScottG
> ________________________________________________________________________
> -- Scott Gravenhorst
> -- http://scott.joviansynth.com/
> -- When the going gets tough, the tough use the command line.
> -- Matt 21:22
> 
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