Date: Fri, 7 Jan 2005 02:37:50 -0800
From: Aaron Lehmann <aaronl@vitelus.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Open hardware wireless cards
Message-ID: <20050107103750.GF3228@vitelus.com>
References: <20050105200526.GL5159@ruslug.rutgers.edu> <41DC4B43.7090109@imag.fr> <20050105202626.GN5159@ruslug.rutgers.edu> <200501060902.07502.norbert-kernel@edusupport.nl> <20050106172438.GT5159@ruslug.rutgers.edu> <1105033035.15352.0.camel@krustophenia.net> <1105034339.24896.228.camel@localhost.localdomain>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1105034339.24896.228.camel@localhost.localdomain>
User-Agent: Mutt/1.5.6i
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1090
Lines: 19

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.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/