Schematics

[sdima1357]

Schematics

[Aether-yang]

I'm also trying to use a STM32 without a DAC to produce music.
@mtexier What about your work now？ Do you fix it?

[sdima1357]

I'm also trying to use a STM32 without a DAC to produce music. I it is possible to have a schematic of the electronic, I assume you do some filtering and amplification?

There is implemented virtual software second order sigma delta adc for the shift quantization noise to high frequency. see here (it [provide useful links too at the end of document):

I don't understand, PWM output means to create a DAC converter, and the mentionned paper seems to speak about ADC conversion.

And finally how it compares to this? http://www.openmusiclabs.com/learning/digital/pwm-dac/

Thanks.

It uses same algorithm for sound processing as described in the paper.
If You use analog (class A, AB or B) amplifier or headphones -they have native low pass filter. You have add low pass filter only in the case class D amplifier...