Lpc2000

On Thu, 2005-01-20 at 15:40 -0800, Paul Stoffregen wrote:

> If you really need near CD audio quality, your best approach is to use a 
> quality DAC chip.  Saddly, these all take high speed serial bitstreams, 
> and Philips doesn't seem to have any LPC chips that are designed to 
> output the common formats (eg, I2S).  These DACs use phase locked loops 
> or other techniques that require a steady clocked bitstream.  It would 
> be quite difficult to emulate such a thing from the SPI port, for example.

Higher rate audio codecs also seem to be power-hogs, at least in
relation to the miserly power that ARM7 is typically associated with.

Does anyone have any good experience with lower power, speech quality
codecs, or even higher rate (CD quality) ones that don't suck (power)
and are suitable for battery powered-operation? Would you recommend
going only with the onboard ADC for 8 khz audio for best low-power
performance?


-- 
Brett Delmage <BDelmage@...>
JSI Telecom