Xref: utzoo comp.misc:5252 rec.music.synth:6272
Path: utzoo!attcan!uunet!hodge!rusty
From: rusty@hodge.UUCP ( System Manager)
Newsgroups: comp.misc,rec.music.synth
Subject: Re: Computer Restoration of Older Recordings
Message-ID: <6814@hodge.UUCP>
Date: 22 Feb 89 22:19:14 GMT
References: <1912@helios.ee.lbl.gov> <4284@drivax.DRI>
Organization: HCR Inc, Orange, CA
Lines: 19

In article <4284@drivax.DRI>, macleod@drivax.DRI (MacLeod) writes:
> Phase Linear had (has?) a technique where the system looks for energy above
> some figure - say 14 kHz - and assumes that it is a second harmonic of 
> something.  If it doesn't find energy at 7 kHz, it flushes the 14 kHz signal.
> You could work this in reverse to add harmonics to heavily-filtered input.

Are you thinking of the 'Autocorelator' that they used to sell?
It was also (mailnly) a multi-spectral noise gate (4 or 5 band, I
believe).

If so, note that Carver includes this same thing in some of their
pre-amps.  (Bob Carver *was* Phase Linear long ago).



-- 

Rusty "No Bugs" Hodge, 1588 N. Batavia St. Orange, CA 92667 Tel (714) 974-6300
rusty@hodge.cts.com [uunet zardoz vdelta crash]!hodge!rusty FAX (714) 921-8038