Hi All

I need some suitable DSP oriented microprocessor to do some audio
effects with it like ECHO , FUZZ , TREMOLLO etc .

My question is which DSP micros are popular/suitable in the guitar/audio 
effects  industry ?

Thanks in advance

ec 

"RealInfo" <t...@yahoo.com> wrote in news:g0ej5r$so0$1
@news4.netvision.net.il:

> Hi All
> 
> I need some suitable DSP oriented microprocessor to do some audio
> effects with it like ECHO , FUZZ , TREMOLLO etc .
> 
> My question is which DSP micros are popular/suitable in the guitar/audio 
> effects  industry ?
> 
> Thanks in advance
> 
> ec 
> 
> 
> 

The Analog Devices' Blackfin is great processor for stomp boxes. They are 
very fast and low power.

Al Clark
Danville Signal Processing, Inc.

Al Clark wrote:


> The Analog Devices' Blackfin is great processor for stomp boxes. They are 
> very fast and low power.

BlackFin is not exactly very fast no very low power. It can only do 
16x16=32 MACs; the 32x32=64 MAC is PITA with it.


Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com

Then what would be your choice/s ?
ec

"Vladimir Vassilevsky" <a...@hotmail.com> ??? 
??????:NVCWj.7174$3...@newssvr19.news.prodigy.net...
>
>
> Al Clark wrote:
>
>
>> The Analog Devices' Blackfin is great processor for stomp boxes. They are 
>> very fast and low power.
>
> BlackFin is not exactly very fast no very low power. It can only do 
> 16x16=32 MACs; the 32x32=64 MAC is PITA with it.
>
>
> Vladimir Vassilevsky
> DSP and Mixed Signal Design Consultant
> http://www.abvolt.com 

On May 14, 10:46=A0am, Vladimir Vassilevsky <antispam_bo...@hotmail.com>
wrote:
> Al Clark wrote:
> > The Analog Devices' Blackfin is great processor for stomp boxes. They ar=
e
> > very fast and low power.
>
> BlackFin is not exactly very fast no very low power. It can only do
> 16x16=3D32 MACs; the 32x32=3D64 MAC is PITA with it.

dunno about power consumption, but i thought that Blackfins were
pretty fast.  fast enough that some folks do nearly everything in
double precision.

i think the Sigma DSP might become such an effects processor.  i know
that is what Source Audio is using.

r b-j

RealInfo wrote:
> Hi All
> 
> I need some suitable DSP oriented microprocessor to do some audio
> effects with it like ECHO , FUZZ , TREMOLLO etc .
> 
> My question is which DSP micros are popular/suitable in the guitar/audio 
> effects  industry ?
> 


The Freescale 56xxx series (prev. motorola) are still very popular for 
audio. For guitarists a most interesting product is the Line6 "Tonecore" 
SDK, which provides a dsp development kit in the form of an effects 
pedal plugin module:

http://www.vettaville.nl/page.php?id=100#609



Richard Dobson

robert bristow-johnson wrote:

>>BlackFin is not exactly very fast no very low power. It can only do
>>16x16=32 MACs; the 32x32=64 MAC is PITA with it.
> 
> 
> dunno about power consumption, but i thought that Blackfins were
> pretty fast.  fast enough that some folks do nearly everything in
> double precision.

I guess what they do is 32x32 = upper 31. This can be done very 
efficiently with BlackFin; 32 x 32 = 64 is the different story.

> i think the Sigma DSP might become such an effects processor.  i know
> that is what Source Audio is using.

Agreed.


Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com

> > i think the Sigma DSP might become such an effects processor.  i know
> > that is what Source Audio is using.

The Sigma DSP is pretty limited, I have seen it as a good companion
processor.  It has built in ADC and DAC, and an efficient little
processor if you had some pre or post filtering that you wanted to
do.  Unless you only want to use VisualDSP I believe the SigmaDSP
development environment will be limited.

Think a general purpose DSP would be better for effects.  Some of the
new blackfins have integrated flash can ease hardware design.

On May 14, 11:08 am, Richard Dobson <richarddob...@blueyonder.co.uk>
wrote:
> RealInfo wrote:
> > Hi All
>
> > I need some suitable DSP oriented microprocessor to do some audio
> > effects with it like ECHO , FUZZ , TREMOLLO etc .
>
> > My question is which DSP micros are popular/suitable in the guitar/audio
> > effects  industry ?
>
> The Freescale 56xxx series (prev. motorola) are still very popular for
> audio. For guitarists a most interesting product is the Line6 "Tonecore"
> SDK, which provides a dsp development kit in the form of an effects
> pedal plugin module:
>
> http://www.vettaville.nl/page.php?id=100#609
>

ya know, Richard, that is not a bad idea at all.  in the olden days,
one could develop on the 56K using their inexpensive (and now, hard to
find) DSP56002EVM or, alternatively, on a Turtle Beach Tahiti,
Monterey, Fiji, or Pinnacle using a C-based loader/monitor/debugger
thingie i developed.

but if Line6 and Freescale put this together well, i presume this
ToneCore DSP Developer Kit (does it include the 563xx assembler?  do
you need a C compiler?) might be precisely what the OP wants.

i *liked* coding on the 56K back in the days that i did (and i was
known here as a 56K partisan).  it wasn't the biggest, most powerful
DSP, but it was good enough and general enough to do what one needed
to do.  leaving out convolutional reverb and frequency-domain pitch
shifting (or any frequency-domain alg), the 56K could do about
anything one can dream up.  it was (or *is*, i guess it actually
didn't die even though i thought it did 5 or 6 years ago) a pleasant
chip to code on (despite a couple of stupidities like how A0 and B0,
the least-significant words in the 56 bit accumulators, were lined up
- it's one bit off, a mistake that Bob Adams didn't repeat in the
Sigma DSP), though not the most powerful nor biggest chip to code on.

r b-j

robert bristow-johnson <r...@audioimagination.com> writes:
> [...]
> a mistake that Bob Adams didn't repeat in the Sigma DSP)

What is this "Sigma DSP"? Ok, wait - I've got Google. But
it's new to me.
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