Date: Wed, 9 Dec 1998 05:58:12 -0500 (EST) From: Peter Dufault <dufault@hda.com> To: jkh@zippy.cdrom.com (Jordan K. Hubbard) Cc: benco@pendor.McKusick.COM, freebsd-multimedia@FreeBSD.ORG Subject: Re: Disk based audio editing tool? Message-ID: <199812091058.FAA29204@hda.hda.com> In-Reply-To: <18997.913182430@zippy.cdrom.com> from "Jordan K. Hubbard" at "Dec 8, 98 09:47:10 pm"
next in thread | previous in thread | raw e-mail | index | archive | help
> > I wrote my own curses-based audio recording program, and I know how to > > crunch PCM data and calculate loudness in dB and stuff like that, > > but the identification and removal of the pops is beyond me. > > Hmm. If you've already figured out how to calculate loudness then the > elimination of pops just involves your existing work plus a little bit > of statistics keeping. :) Clicks and pops actually have very high > transient volume levels and stick out like a sore thumb on a 'scope. I expect those clicks and pops are at the angular velocity of the record - take a transform and put it through a notch filter at that frequency, kind of like the way they remove the gridding from piecewise scanned images. I expect they will really stick out in the frequency space. Peter -- Peter Dufault (dufault@hda.com) Realtime development, Machine control, HD Associates, Inc. Safety critical systems, Agency approval To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199812091058.FAA29204>