Xref: utzoo sci.electronics:7726 rec.audio:15146 comp.sys.ibm.pc:34518
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!boulder!gordon
From: gordon@boulder.Colorado.EDU (GORDON ALLEN R)
Newsgroups: sci.electronics,rec.audio,comp.sys.ibm.pc
Subject: Re: Need pointers to PC Spectrum Analyzer board
Keywords: audio spectrum analyzer PC board
Message-ID: <11538@boulder.Colorado.EDU>
Date: 11 Sep 89 17:36:35 GMT
References: <1011@swdev.Waterloo.NCR.COM>
Sender: news@boulder.Colorado.EDU
Reply-To: gordon@boulder.Colorado.EDU (GORDON ALLEN R)
Organization: University of Colorado, Boulder
Lines: 31

In article <1011@swdev.Waterloo.NCR.COM> dgs@swdev.UUCP (David G. Schwartz) writes:
>I have a friend who is starting a company and he has a need for an IBM
>compatible plug-in board with software to do audio frequency spectrum 
>analysis for psycho-acoustic R&D.
>
>If anyone can help by providing pointers for sources for such a device
>I would appreciate the information.
> 
In lieu of any info about budget and assuming you have an A/D board, one way to
go is to get an array processor such as the DT7010 or DT7020 from Data Trans-
lation.  Software is available for FFT calculation.  The 1st board can do a
1K FFT in about 30msec (floating point).  The other board is about 2x faster 
and has a new interface for direct connection to their new A/D boards which
bypases the relatively slow AT buss.  I have been using the DT7010 board and
while the documentation is ok, the technical support from Data Translation is
wretched, the board works great.

A cheaper way to go is via software,albeit much more slowly.  On an AT at about
8 MHz with a '287 coprocessor, algorithms are available to do 1K FFT's in about
2 seconds or so.

You might also contact Morton Orentlicher @ 212-490-6640 about a board his com-
pany produces.  Tell him I told you to call.

By the way, I have no direct connection with either company, blah, blah blah.

Good luck

Allen Gordon
P
wr