Surprisingly or not, PWM circuits (a counter and binary comparator) are more common than DACs on today's microcontrollers. I blew up some somewhat expensive tweeters finding out that just because you can't hear the 31.275kHz PWM carrier doesn't mean the amplifier isn't amplifying it.
Surprisingly or not, PWM circuits (a counter and binary comparator) are more common than DACs on today's microcontrollers. I blew up some somewhat expensive tweeters finding out that just because you can't hear the 31.275kHz PWM carrier doesn't mean the amplifier isn't amplifying it.