🚀 go-pugleaf

Tom Loredo <loredo@astro.cornell.edu> wrote in news:loredo-
034EEB.19562325032002@newsstand.cit.cornell.edu:

> 
> Johnny, et al.-
> 
> I'm in a similar situation, with a project in mine that will
> require several bands of adjustable parametric EQ in each of
> 2 to 4 channels.  I am
> contemplating SHARC or other DSP chips, but also am looking
> at specialized filter chips like the TAS3001/2/4 series,
> or the upcoming Analog Devices Sigma-DSP series (AD1954).
> These chips have a specialized DSP with several bands of
> biquad filter pre-programmed; the user can specify the
> coefficients.
> 
> Questions:
> 
> * Does anyone have experience with any of these more specialized
> chips?  Is the biquad topology a significant limitation for
> more-or-less standard audio filtering?
> 
> * A big hesitation of the general DSP route for me is that I'd
> like to build stand-alone devices after development.  The
> specialized chips are much smaller (smaller pin count, larger
> pin spacing) and will be easier for someone with a small lab
> to work with.  Have any readers here gone from an EZ-Kit project
> to a standalone project?  How hard is it to design/assemble
> a PCB for SHARC-scale chips?  Right now I'm just learning
> surface-mount assembly techniques, using basic Pace tools
> (e.g., miniwave solder tips).  I would use a board house
> to make the boards, but I'd be assembling them myself.
> 
> Thanks,
> Tom Loredo

You probably won't be soldering 21161 parts by hand, they are BGAs.

You might want to check out our DSP function modules. Although, they use 16 
bit DSPs, a parametric eq could be written in double precision.  


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