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Demystifying the PPG wave 2.2 and 2.3
& 2.3Thanks to MiK for his knowledge and his FLUKE PM3394B 200 MHz Combiscope. PPG wave 2.2 = 8 bit and wave 2.3 = 12 bit? The PPG wave 2.2 with the original wave 2.2 analog boards (named "OF 4"") have AD558 DACs per voice.
Two OSCs playing triangle wave with only a little detunesame as left, but zoomed Notice the rapid switching from one to another oscillator sample word Yes, the main and the so called sub oscillator of a PPG wave 2.2/3 voice are never mixed or added! And every oscillators got a sample rate of about 183.8 kHz (= 25 MHz quartz ÷8 ÷17 ticks of PAL cycle). But we get plenty of high pitched aliasing beyond our hearing range using this strange method.
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