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DAC is short for Digital to Analog Converter. In this article we play around the code Michael Smith created for a PWM based DAC.

David Fowler writes:

"I modified his code so that other DAC options could be tried. I compare the 8-Bit PWM DAC with the R2R DAC at various numbers of bits. You might be surprised at how well a 4-bit DAC sounds. This article includes several sound samples for the various DAC options and demonstrates some software abstraction that allows for multiple DAC options.

"This article is part of the series on Arduino Sound Generation. I decided to drop the Part 1, 2, 3 distinctions as much of the content is not dependent on the previous articles."