[sdiy] 8th order?

Magnus Danielson magnus at rubidium.dyndns.org
Tue Jun 5 22:45:08 CEST 2007


From: "HL-SDK Synths" <syntroniks at gmail.com>
Subject: Re: [sdiy] 8th order?
Date: Tue, 5 Jun 2007 16:28:14 -0400
Message-ID: <643888bd0706051328h7a512aecmc891c373d49754f7 at mail.gmail.com>

> And why are there no 10 or 12 or 14 pole filters, despite being hard to
> construct?

Who said there arn't?

12-step phaser anyone?

The 48-dB cross-overs i used to work with have 6 poles high-pass and 6 poles
low-pass and then has a bunch of additional poles in the all-pass filter which
delays the signal of the MID adds even more poles (don't recall how many and
too lazy to pull the schematics from the file-cabinett).

They are there, but you don't see them as often. 48 dB/Oct is very steep and
does not always match our psycoacoustical taste at all times.

Cheers,
Magnus



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