Re: Need good quality Audio output through LPC21xx controller



angaddhot@xxxxxxxxx wrote:

On Sep 30, 6:56 pm, Vladimir Vassilevsky <antispam_bo...@xxxxxxxxxxx>
wrote:

With PWM at 32kHz carrier and 8bit quantization, you can get a
"telephone line" quality speech. It would be even better if you apply
the preemphasis and the noise shaping to the recorded signal. You can
gain somewhat more quality if you combine several PWM channels. However
if you need the "music" quality audio, you should use an external DAC.


What about DAC codec ??
It needs I2S interface which is not available with LPC21XX.
If anyone know how to convert SSP from microcontroller controller to
I2S format in software.

I can do that for you, however this is going to be business.


Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
.