[Speex-dev] PWM vs. DAC output

Andras Kadinger bandit at surfnonstop.com
Mon Oct 31 09:01:31 PDT 2011

You have sent this question to the list of the developers of the Speex 
speech/audio codec.

Speex itself works in the PCM domain, so input/output is well suited to 

The rest of your question is not a Speex question, but a generic audio 
electronics question. I suggest you look for generic audio electronics 
sources for answers.

2011.10.25. 15:33 keltezéssel, David Wyskiel - Wyskiel Tech írta:
> I am using ST micro's STM32F103 chip with their AN2812 development 
> code.  It uses a PWM output, resulting in low-quality sound.  Can I 
> just use a scaled version of the PWM to drive a DAC? (i.e. is the 
> output linear, or is there shaping to make the PWM output work?)
> Any feedback, links or pointers would be greatly appreciated.
> David.
> _______________________________________________
> Speex-dev mailing list
> Speex-dev at xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev

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