Audio with PWM: Difference between revisions

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* http://www.fpga4fun.com/PWM_DAC.html
* http://www.fpga4fun.com/PWM_DAC.html


[[Image:FrenchFlag.png]][[Fr:Audio avec PWM| Cette page en français]]
{{LanguageBar|Audio_with_PWM|Audio avec PWM|Audio mit PWM}}


[[Category:Audio]]
[[Category:Audio]]
{{LanguageBar|Audio_with_PWM|Audio avec PWM|Audio mit PWM}}

Revision as of 20:32, 15 May 2008

It is possible to generate sound with the APF9328 without any sound chip, just by using the PWM output and the i.MXL possibilities:

AudioWithPWM.png

Quality

Sound quality produced is low (8bits @ 8, 16 or 32KHz) but very sufficient to reproduce voice or small sounds. PWM activation/deactivation is generating "clac" each time you play a sound (for the moment) but using some electronic filters or playing "blank noise" could solve the problem.

Links

Other languages:

English Flag.svg English  •  French Flag.svg Français