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Lpc2000

Index last updated: 2026-04-28 23:31 UTC

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Re: D/A noise

2006-01-23 by tengelberth

Thanks to all the great suggestions on my D/A noise.  

To start I am working on adding a Butterworth filter (8 order) to the
D/A output and will test again to see what it sounds like. Once that
is done I will look at any jitter issues.  

By the way,  I got the open source Speex wideband (16Khz) decoding
running on my LPC2138 board. I am using Speex to compress a 10 sec
file to about 25KB. 
I will be comparing speex's quality to just playing from a wav file.
Speex sounds good on my PC but need to see if any issue come up on the
 LPC2138.  My goal is to put 10 mins of speech on a 2MB serial flash
chip. 


Thanks again 
Tom

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