What's the part number for the DSP chip? Is a data sheet available on the web? I'm assuming it's some sort of off-the-shelf ASIC (is that a contradiction in terms or what?) rather than a general purpose DSP.

Speaking of I2C (not I2S), is there a convenient place to tack a couple wires for it? I have a pile of I2C temperature sensors left over from another project, and my car doesn't have a thermometer...

Thanks.