From owner-freebsd-multimedia Mon Dec 22 09:37:47 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id JAA09179 for multimedia-outgoing; Mon, 22 Dec 1997 09:37:47 -0800 (PST) (envelope-from owner-freebsd-multimedia) Received: from rah.star-gate.com (rah.star-gate.com [204.188.121.18]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id JAA09173 for ; Mon, 22 Dec 1997 09:37:44 -0800 (PST) (envelope-from hasty@rah.star-gate.com) Received: from rah.star-gate.com (localhost.star-gate.com [127.0.0.1]) by rah.star-gate.com (8.8.8/8.8.8) with ESMTP id JAA01209; Mon, 22 Dec 1997 09:33:50 -0800 (PST) (envelope-from hasty@rah.star-gate.com) Message-Id: <199712221733.JAA01209@rah.star-gate.com> X-Mailer: exmh version 2.0gamma 1/27/96 To: Stephen Roome cc: Luigi Rizzo , multimedia@freebsd.org Subject: Re: precise soundcard tuning ? In-reply-to: Your message of "Mon, 22 Dec 1997 12:34:11 GMT." Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Date: Mon, 22 Dec 1997 09:33:50 -0800 From: Amancio Hasty Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by hub.freebsd.org id JAA09175 Sender: owner-freebsd-multimedia@freebsd.org X-Loop: FreeBSD.org Precedence: bulk The sound blaster cards are known not to be very precise sound cards. Amancio > On Mon, 22 Dec 1997, Luigi Rizzo wrote: > > Since capture and acquisition often have the same sample clock, > > you could sample the tuning fork with a microphone, determine the > > actual period in samples, and then generate the sound with the > > "correct" (i.e. equal to the reference) frequency. > > I'll try this approach. Still, I find it remarkable that I'm going to have > to tune a £100 piece of sound hardware with either a £20 guitar tuner or a > £2 tuning fork. PC hardware is just such high quality stuff! > > Many Thanks, > > Steve. > > -- > Steve Roome - Vision Interactive Ltd. > Tel:+44(0)117 9730597 Home:+44(0)976 241342 > WWW: http://dylan.visint.co.uk/ >