From owner-freebsd-multimedia Tue Dec 8 21:12:15 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id VAA03104 for freebsd-multimedia-outgoing; Tue, 8 Dec 1998 21:12:15 -0800 (PST) (envelope-from owner-freebsd-multimedia@FreeBSD.ORG) Received: from pendor.McKusick.COM (pendor.mckusick.com [209.31.5.75]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id VAA03099 for ; Tue, 8 Dec 1998 21:12:14 -0800 (PST) (envelope-from benco@pendor.McKusick.COM) Received: from localhost (benco@localhost [127.0.0.1]) by pendor.McKusick.COM (8.9.1/8.9.1) with SMTP id VAA26951 for ; Tue, 8 Dec 1998 21:12:08 -0800 (PST) Message-Id: <199812090512.VAA26951@pendor.McKusick.COM> X-Authentication-Warning: pendor.McKusick.COM: benco@localhost [127.0.0.1] didn't use HELO protocol To: freebsd-multimedia@FreeBSD.ORG Subject: Re: Disk based audio editing tool? In-reply-to: Your message of "Tue, 08 Dec 1998 23:46:59 EST." Date: Tue, 08 Dec 1998 21:12:07 -0800 From: Ben Cottrell Sender: owner-freebsd-multimedia@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Tue, 8 Dec 1998 23:46:59 -0500 (EST), kfurge@worldnet.att.net wrote: > After capturing, I would like to use the editor to trim the ends and > filter out any pops and clicks. I looked through the 'audio' section of > the ports collection and tried 'dap' and 'mxv' but being memory based > editors, they maxed out my system fairly quickly. I do end-trimming with dd--works quite nicely on raw PCM files, although not so well on files that have headers, like wav. No matter-- you can easily convert back and forth with sox. Fade-ins and fade-outs are quite handily done with the pcmfade utility that comes with tosha. Pops and clicks... ahh, there's the rub. So far I've not been able to find any utility that does this. I'm not averse to a little programming; but I don't know of an audio equivalent of Knuth, and would be much obliged to anyone who can point me to some pseudocode or ideas on Windows Cooledit style click/pop removal. 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. ~Ben To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message