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Audio DSP Micro ?

Started by RealInfo May 14, 2008
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" <therightinfo@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" <antispam_bogus@hotmail.com> ??? 
??????:NVCWj.7174$3O7.4048@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&#2013266080;am, Vladimir Vassilevsky <antispam_bo...@hotmail.com>
wrote:
> 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.
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 <rbj@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. -- % Randy Yates % "Watching all the days go by... %% Fuquay-Varina, NC % Who are you and who am I?" %%% 919-577-9882 % 'Mission (A World Record)', %%%% <yates@ieee.org> % *A New World Record*, ELO http://www.digitalsignallabs.com