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

[Scott Gravenhorst]

Ok, thanks - I will take this route and see where it leads.  My experience with dsPIC was
enough that I know it's possible to do a lot with only 16 bits if you understand how the
numbers work.  dsPIC also has a 40 bit accumulator after the MAC instruction's
multiplier.  The big problem I have with the dsPIC is the noisy DACs...  too bad, I had
hoped they'd fix that or do a 32 bit version with better DACs ... oh well...  Float -
even single precision, however, is a real serious step up since the mantissa is 24 bits
with the exponent representing coarse magnitude.  The advantage of float over 16 bit
fixed was ever so apparent when I started to play with the raspberry pi.  I will check
out the TMDX5505EZDSP, I don't much care what the "form factor" is, USB  powered is no
problem for me.  I'm retired now and I'm looking for something to keep me interested and
busy and maybe earn some beer money.  (now you see my ulterior motive).

I really super appreciate ALL of the help that so many on this list are offering, I am
considering all of it and I'm overwhelmed by the response here - thank you all so much as
I know I am benefiting from the many years of experience here.  :)  SDIY is an amazing
forum and I hope that I am not boring the crap out of too many people as I know I'm
asking a lot of questions.

rsdio at audiobanshee.com wrote:
>In my experience, Digi-Key is the most expensive source for anything. I onl=
>y go there when Mouser, Jameco, and everyone else is out of stock or don't =
>even list a part.
>
>That said, Texas Instruments has a wide range of evaluation boards, includi=
>ng some very expensive ones. I remember looking at one around $1,500 that I=
> had to pass on. I always go directly to the manufacturer to discover the e=
>valuation boards, because the manufacturer will have the most information a=
>nd full support for their product. Texas Instruments and Microchip have the=
>ir own web stores, so it's easy to buy direct from the manufacturer.
>
>You might want to look at the $49 TMDX5505EZDSP. It's a good choice for a U=
>SB-powered DSP, although Texas Instruments has faster DSP chips for those s=
>ituations where more wattage is available.
>
>Other options are the $89 TMDX5502EZDSP or the $99 TMDX5535EZDSP.
>
>Don't be distracted by the fact that these are 16-bit DSP chips; they have =
>40-bit internal accumulators with lots of precision and headroom for audio =
>processing - more than enough for 24-bit audio. Of course, fixed-point proc=
>essing can be a challenge, but it makes perfect sense in the cases where yo=
>u need low power consumption.
>
>Brian
>
>
>On May 12, 2017, at 2:52 PM, Scott Gravenhorst <music.maker at gte.net> wrote:
>> Hmm.  Well, since I am going to soon receive the F7 Discovery board
>> soon, I will probably wind up determining if that is simply sufficient
>> for my goals - those are mainly to support a polysynth with high
>> quality sound with special effects (reverb, chorus, etc) and minimum of
>> 16 voices of polyphony with what most would consider a robust feature
>> set.  The TMS320 boards at Digikey I saw were all in the $400 range,
>> but maybe I have no foo in my google :p =85
>
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at synth-diy.org
>http://synth-diy.org/mailman/listinfo/synth-diy
>

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- http://scott.joviansynth.com/
-- When the going gets tough, the tough use the command line.
-- Matt 21:22