From owner-freebsd-multimedia Wed Sep 3 16:32:28 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id QAA15164 for multimedia-outgoing; Wed, 3 Sep 1997 16:32:28 -0700 (PDT) Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id QAA15153 for ; Wed, 3 Sep 1997 16:32:19 -0700 (PDT) Received: from gurney.reilly.home (d13.syd2.zeta.org.au [203.26.11.13]) by godzilla.zeta.org.au (8.8.5/8.6.9) with ESMTP id JAA12161; Thu, 4 Sep 1997 09:19:53 +1000 Received: (from andrew@localhost) by gurney.reilly.home (8.8.7/8.8.5) id JAA02065; Thu, 4 Sep 1997 09:16:54 +1000 (EST) From: Andrew Reilly Message-Id: <199709032316.JAA02065@gurney.reilly.home> Date: Thu, 4 Sep 1997 09:16:54 +1000 (EST) Subject: Re: snd970903.tgz and pnp970903.tgz To: luigi@labinfo.iet.unipi.it cc: multimedia@FreeBSD.ORG In-Reply-To: <199709031724.TAA08293@labinfo.iet.unipi.it> MIME-Version: 1.0 Content-Type: TEXT/plain; CHARSET=US-ASCII Sender: owner-freebsd-multimedia@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Hi Luigi, Sorry to be a bother, but I think you probably know more about this than most by now. On 3 Sep, Luigi Rizzo wrote: > * fixed SB16 PnP operation, now works in 8 and 16bit, both > capture and playback; > > not recognised/not working (although the SB16 driver still needs > refinements in order to support full duplex operation). I haven't bought a sound card yet because I want to be sure that I can do full-duplex, full bandwidth (48kHz preferably, 44.1kHz is OK) signal processing. All I've heard about the SB16 (and by extension the SB32, AWE32, and AWE64) says that the closest it comes to full-duplex is 16 bits out/8 bits in. Is that the case? Are there any inexpensive sound cards with good AD/DA quality that can do full duplex 16-bit? In any case, do you have an idea of the minimum latency you could get with a program that just did un-buffered reads and writes to the audio device? Are we talking about <= 20ms? (I'm a DSP guy, and I would very much like to be able to prototype algorithms on my workstation, before I have to cut them into DSP code.) -- Andrew "The steady state of disks is full." -- Ken Thompson