Messages in this thread | | | Date | Fri, 7 Jan 2005 02:37:50 -0800 | From | Aaron Lehmann <> | Subject | Re: Open hardware wireless cards |
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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/
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