From owner-freebsd-multimedia Thu Jan 18 11:24:45 1996 Return-Path: owner-multimedia Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id LAA26697 for multimedia-outgoing; Thu, 18 Jan 1996 11:24:45 -0800 (PST) Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id LAA26691 for ; Thu, 18 Jan 1996 11:24:40 -0800 (PST) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id UAA18399; Thu, 18 Jan 1996 20:25:34 +0100 From: Luigi Rizzo Message-Id: <199601181925.UAA18399@labinfo.iet.unipi.it> Subject: Re: FreeBSD and VAT To: james@miller.cs.uwm.edu (Jim Lowe) Date: Thu, 18 Jan 1996 20:25:33 +0100 (MET) Cc: multimedia@freebsd.org, multimedia@rah.star-gate.com, tlehman@becky.acet.org, toml@mitre.org In-Reply-To: <199601181856.MAA06528@miller.cs.uwm.edu> from "Jim Lowe" at Jan 18, 96 12:56:08 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-multimedia@freebsd.org Precedence: bulk > The soundblaster will probably always sound a little choppy just because it > really doesn't run at 8khz. The way to fix that is to purchase a full duplex ^^^^^^^^^^^^^^^^^^^ What do you mean by that ? You cannot expect any two cards to have exactly the same rate, so the software (and I mean the user-level software, not the device driver) must compensate speed mismatches by removing/adding samples. If it doesn't in a soft way (by means of small corrections at every segment), sooner or later you will be way out of sync and you will hear clicks. I cannot tell what is the maximum % difference in sample rates which can give acceptable results (it depends a lot on the block size you are using), but my feeling is that 1% or less should not give too bad results. Luigi ==================================================================== Luigi Rizzo Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it Universita' di Pisa tel: +39-50-568533 via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 http://www.iet.unipi.it/~luigi/ ====================================================================