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From: Aaron Lehmann <aaronl@vitelus.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Open hardware wireless cards
Date: Fri, 7 Jan 2005 02:37:50 -0800	[thread overview]
Message-ID: <20050107103750.GF3228@vitelus.com> (raw)
In-Reply-To: <1105034339.24896.228.camel@localhost.localdomain>

On Thu, Jan 06, 2005 at 05:59:01PM +0000, Alan Cox wrote:
> Audio is easy. Good audio is rocket science. You can roll yourself a USB
> audio interface with a microcontroller and a codec ic. Getting that to
> give you a really good signal/noise ratio is then rather trickier.

Actually you don't even need a microcontroler: use an IC like the TI
PCM2902 (http://focus.ti.com/docs/prod/folders/print/pcm2902.html). I
built a headphone amplifier that uses one and I'm very pleased -
especially because there's digital passthrough for my speakers via
S/PDIF. The quality is nothing special, but you can always
plug a high-end codec into the S/PDIF I/O. I saw a schematic
somewhere that used the PCM2902 as the USB-audio interface along with
a high end DAC. However if you need more than 16 bits and 48kHz you
might need to make something more fancy.

  parent reply	other threads:[~2005-01-07 10:37 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20050105192447.GJ5159@ruslug.rutgers.edu>
2005-01-05 20:05 ` Open hardware wireless cards Luis R. Rodriguez
2005-01-05 20:14   ` Lennart Sorensen
2005-01-05 20:48     ` linux-os
2005-01-05 21:35       ` Lennart Sorensen
2005-01-05 21:09     ` Tomasz Torcz
2005-01-08 20:47       ` Adrian Bunk
2005-01-09  9:59         ` Norbert van Nobelen
2005-01-09 22:28           ` Bernd Petrovitsch
2005-01-09 23:00           ` Alan Cox
2005-01-05 20:17   ` Raphael Jacquot
2005-01-05 20:26     ` Luis R. Rodriguez
2005-01-06  8:02       ` Norbert van Nobelen
2005-01-06 17:24         ` Luis R. Rodriguez
2005-01-06 17:37           ` Lee Revell
2005-01-06 17:38             ` Luis R. Rodriguez
2005-01-06 17:42               ` Lee Revell
2005-01-06 19:06                 ` Norbert van Nobelen
     [not found]                   ` <1105044024.15770.7.camel@krustophenia.net>
2005-01-06 20:51                     ` Norbert van Nobelen
2005-01-06 17:59             ` Alan Cox
2005-01-06 20:25               ` Lee Revell
2005-01-07 10:37               ` Aaron Lehmann [this message]
2005-01-06 19:11           ` Raphael Jacquot
2005-01-06 19:32             ` Norbert van Nobelen
2005-01-06 21:00               ` Lee Revell
2005-01-06 21:24                 ` Lennart Sorensen
2005-01-06 21:39                 ` Jim Nelson
2005-01-06 21:42                   ` Norbert van Nobelen
2005-01-08 11:58                   ` Paul Jakma
2005-01-06 21:43                 ` Christoph Hellwig
2005-01-05 20:22   ` [Prism54-users] " Steve Hill
2005-01-05 20:36     ` Luis R. Rodriguez
2005-01-05 22:19   ` christos gentsis
2005-04-19 19:07   ` Karel Kulhavy

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