[LAU] Open Sound Interface project beginnings

[Charles Henry]

On Tue, Oct 25, 2011 at 4:52 PM, pod <_ at whats-your.name> wrote:
>> DA interface project that I found some months ago..
>
> vaguely rings a bell. more recently ive seen SDR-Widget, as radio is quite demanding of ADC noise-floor quietness, flatness - eg most Intel HDA cards are not really capable of 192khz sampling with a fixed ~22KHz brickwall LPF (prevent aliasing at low samplerates) which isnt switched to a different LPF at higher rates (cost reasons presumably) and even "good" cards like emu 0202 could be improved upon..
>
> http://sdr-widget.googlecode.com/files/Draft4_Sound_card_noise_floor_compare_2010_07_25_TF3LJ.pdf

This looks good to study--that analog board has great noise characteristics.
And the IC uses I2S, another standard bus that could be good to use.

Overall, what I'm most impressed by is their timeline--completed the
device plus linux drivers in about 1 year.