From owner-freebsd-multimedia Thu Dec 10 00:34:47 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id AAA21875 for freebsd-multimedia-outgoing; Thu, 10 Dec 1998 00:34:47 -0800 (PST) (envelope-from owner-freebsd-multimedia@FreeBSD.ORG) Received: from haldjas.folklore.ee (Haldjas.folklore.ee [193.40.6.121]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA21867 for ; Thu, 10 Dec 1998 00:34:39 -0800 (PST) (envelope-from narvi@haldjas.folklore.ee) Received: from haldjas.folklore.ee (haldjas.folklore.ee [172.17.2.1] (may be forged)) by haldjas.folklore.ee (8.8.8/8.8.4) with SMTP id KAA11110; Thu, 10 Dec 1998 10:33:49 +0200 (EET) Date: Thu, 10 Dec 1998 10:33:49 +0200 (EET) From: Narvi To: "Jordan K. Hubbard" cc: Ben Cottrell , freebsd-multimedia@FreeBSD.ORG Subject: Re: Disk based audio editing tool? In-Reply-To: <18997.913182430@zippy.cdrom.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-multimedia@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Tue, 8 Dec 1998, Jordan K. Hubbard wrote: > > 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. > > If you keep a running average of the median volume, you should > probably be able to eliminate a surprising number of such transients > with a very simple algorithm. No guarantees that this will work on > punk rock music, of course, where such transients often count as > artistic expression. > But in reality, all such editing and effect involve lots of Fourier transforms. > - Jordan > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-multimedia" in the body of the message > Sander There is no love, no good, no happiness and no future - all these are just illusions. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message