Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 exptools 1/6/84; site ihu1g.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!ihnp4!ihu1g!fish From: fish@ihu1g.UUCP (Bob Fishell) Newsgroups: net.audio Subject: Re: EQ question (partial retraction) Message-ID: <242@ihu1g.UUCP> Date: Wed, 7-Mar-84 23:40:50 EST Article-I.D.: ihu1g.242 Posted: Wed Mar 7 23:40:50 1984 Date-Received: Thu, 8-Mar-84 19:27:52 EST References: <1534@burdvax.UUCP>, <240@ihu1g.UUCP>, <425@hound.UUCP> Organization: AT&T Bell Labs, Naperville, IL Lines: 15 (oo) Sorry, folks, muffed it again. FM preemphasis is standardized at 75uS in this country. I was wrong about the corner frequency, too; it's 2120 Hz. @+3dB. Deemphasis is exactly opposite. 120 uS is for ferric tape;70 uS for chrome and metal, Dolby notwithstanding. Just goes to show you what happens to the brains of a former hardware honcho when they chain you to a terminal and take your soldering iron away. Fortunately, I still have a few of my textbooks around; the corrected info above is from one of them. But didn't you like the pictures? -- Bob Fishell ihnp4!ihu1g!fish