[linux-audio-dev] specs for 1/3 octave filters

Alfons Adriaensen fons.adriaensen at alcatel.be
Thu Mar 3 15:12:24 UTC 2005

On Thu, Mar 03, 2005 at 02:34:17PM +0000, Steve Harris wrote:

Hi Steve,

> I had a copy of the spec at one time, but I cant find it, I do still have
> the formular for calculating the band centres though:
> freq = 25 x 10^(band/10)
> with band in [0,29]

I've been able to recite them even when drunk for the
last 25 years or so :-)

What I need is the eact requirements on the filter shapes.
IIRC there are even conflicting specs for these from ANSI and IEC.
> I can probably find it again when I get back to work next week.

That would be great. Thanks a lot.


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