Choose a chip for audio processing

Hi!

Please help to choose a dsp chip for a audio processing project. I want to
make a kind of effect box with reverberation or surround algorithm inside.
Since have experience mostly in dsp programming area, I need an all-in-one
solution including the dsp, memory, adc/dac etc, to make board design as
simple as possible.

The requirements are:
2-3ch ADC, 2-8ch DAC
digital in/out (optional)
fixed or float
50-70 mips
C compiler available
RAM/ROM - more is better
not expensive
easy to deal with

denden wrote:
> Hi!
>
> Please help to choose a dsp chip for a audio processing project. I want to
> make a kind of effect box with reverberation or surround algorithm inside.

I am doing a similar kind of a project. Thats an FM receiver with USB
interface
to record programs at scheduled time.

> Since have experience mostly in dsp programming area, I need an all-in-one
> solution including the dsp, memory, adc/dac etc, to make board design as
> simple as possible.
>

I am considering dsPIC series from Microchip and Blackfin 538 from ADI.
Normally Blackfins don't have flash but this new chip "538" has it.

Warm regards
--Himanshu

"Himanshu Chauhan" <hs.chauhan@gmail.com> wrote in message 
news:1149818819.745696.10350@g10g2000cwb.googlegroups.com...
>
> I am doing a similar kind of a project. Thats an FM receiver with USB
> interface
> to record programs at scheduled time.

Coincidentally I manufactured a number of these 
http://www.silabs.com/tgwWebApp/public/web_content/products/Microcontrollers/en/USBFMRadio.htm 
with a few minor firmware and hardware changes before they became generally 
available about three months ago for a Seattle startup 
(http://www.snaptune.com). The design used 0402 devices that are placed 
rather too close together for hand soldering, and the soldering of QFN 
packages by hand can also be a little fun.

Digikey part #336-1293-ND

Cheers, Howard 

Howard Long wrote:
> "Himanshu Chauhan" <hs.chauhan@gmail.com> wrote in message
> news:1149818819.745696.10350@g10g2000cwb.googlegroups.com...
> >
> > I am doing a similar kind of a project. Thats an FM receiver with USB
> > interface
> > to record programs at scheduled time.
>
> Coincidentally I manufactured a number of these
> http://www.silabs.com/tgwWebApp/public/web_content/products/Microcontrollers/en/USBFMRadio.htm
> with a few minor firmware and hardware changes before they became generally
> available about three months ago for a Seattle startup
> (http://www.snaptune.com). The design used 0402 devices that are placed
> rather too close together for hand soldering, and the soldering of QFN
> packages by hand can also be a little fun.
>

Its the same that I am working upon for my final year project. But my
design is using FM tuner from Philips. I was considering dsPIC so that
I can implement some filters like dynamic range compressor inside the
device.

Is USB power driving the whole circuit? I was thinking of an external
power source to make it an independent system as well. To make it work
stand alone as well as with a PC.

Regards
--Himanshu

denden wrote:
> Hi!
>
> Please help to choose a dsp chip for a audio processing project. I
> want to make a kind of effect box with reverberation or surround
> algorithm inside. Since have experience mostly in dsp programming
> area, I need an all-in-one solution including the dsp, memory,
> adc/dac etc, to make board design as simple as possible.
>

> The requirements are:
> 2-3ch ADC, 2-8ch DAC
> digital in/out (optional)
> fixed or float
> 50-70 mips
> C compiler available
> RAM/ROM - more is better
> not expensive
> easy to deal with

You may want to look at the ATSAM3308
http://www.atmel.com/dyn/products/datasheets.asp?family_id=618

Has a DSP array of 8 x 24 bit DSPs and a 16 bit micro on one chip.
8 input channels and 8 output channels.
* MP3 decoding with time stretch and pitch control, concurrent Wavetable
synthesis, effect processing and digital mixing.

-- 
Best Regards,
Ulf Samuelsson
ulf@a-t-m-e-l.com
This message is intended to be my own personal view and it
may or may not be shared by my employer Atmel Nordic AB

denden wrote:
> Hi!
>
> Please help to choose a dsp chip for a audio processing project. I want to
> make a kind of effect box with reverberation or surround algorithm inside.
> Since have experience mostly in dsp programming area, I need an all-in-one
> solution including the dsp, memory, adc/dac etc, to make board design as
> simple as possible.
>
> The requirements are:
> 2-3ch ADC, 2-8ch DAC
> digital in/out (optional)
> fixed or float
> 50-70 mips
> C compiler available
> RAM/ROM - more is better
> not expensive
> easy to deal with

Where's Al when you need him? Check out

http://www.danvillesignal.com/index.php?id=products_dspstak

If you inted to implement a multi-channel reverb (say two input, five
output) you have to increase that MIPS count a bit. Analog Devices has
an application note available from their website on how to implement
audio effects with their floating-point DSPs (which are used in
Danville's products). It doesn't include reverbs, however.

Regards,
Andor

"Andor" <andor.bariska@gmail.com> wrote in
news:1150096607.628409.32400@h76g2000cwa.googlegroups.com: 

> denden wrote:
>> Hi!
>>
>> Please help to choose a dsp chip for a audio processing project. I
>> want to make a kind of effect box with reverberation or surround
>> algorithm inside. Since have experience mostly in dsp programming
>> area, I need an all-in-one solution including the dsp, memory,
>> adc/dac etc, to make board design as simple as possible.
>>
>> The requirements are:
>> 2-3ch ADC, 2-8ch DAC
>> digital in/out (optional)
>> fixed or float
>> 50-70 mips
>> C compiler available
>> RAM/ROM - more is better
>> not expensive
>> easy to deal with
> 
> Where's Al when you need him? Check out
> 
> http://www.danvillesignal.com/index.php?id=products_dspstak
> 
> If you inted to implement a multi-channel reverb (say two input, five
> output) you have to increase that MIPS count a bit. Analog Devices has
> an application note available from their website on how to implement
> audio effects with their floating-point DSPs (which are used in
> Danville's products). It doesn't include reverbs, however.
> 
> Regards,
> Andor
> 
> 

We have some new boards that might be of interest. Our dspstak 21369zx2 
was an ADI ADSP-21369, SDRAM (needed for reverb), high speed USB, etc.

We also have a new I/O module: dspstak c192k48 which is 4 in/8 outwith 
sampling as high as 192K. A balanced extender is available for balanced +
4dBu audio circuits. 

-- 
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
Purveyors of Fine DSP Hardware and other Cool Stuff
Available at http://www.danvillesignal.com