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5. Using the DAC Prescaler

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RYM2612 includes an audio input mode, which is designed to replicate the sound of the 8-bit PCM sample output option of the original chip. The idea is that you can apply this sound to any audio routed through the instrument, and the DAC Prescaler control on RYM2612 allows you to fine tune the effect. 2

You’ll need to check how your particular DAW handles sidechain inputs for instruments, as this implementation in particular is handled in various different ways. Here in Logic Pro, we can route any available tracks using the plugin window sidechain option, which is reasonably straightforward as long as we mute the source track. 3

However, if your DAW doesn’t make routing audio via an instrument plugin very easy, there is an alternative as Inphonik has actually bundled DAC Prescaler functionality into a free plugin which you can download here: bit.ly/cm_inph_retdec. We’ll use this to demonstrate what the effect does. 4

Here we’ve loaded an audio loop and inserted an instance of PCM2612. The first thing you’ll notice is that, in the default state, the plugin adds noise. However, the fun really starts when you wind up the DAC Prescaler. You have 32 steps of 8-bit decimation, each creating their own slightly different ringy effect. 5

Much like RYM2612, you can choose between Legacy and Crystal Clear modes and these also influence the sound, even in the default state with the DAC Prescaler set to 1. You’ll see the plugin has other options including Mono and Dry/Wet mix. Meanwhile selecting the cog icon reveals the interface style and scaling options. 6

As with any bitcrush or downsampling effect, outcomes can be varied and also level-dependent. This plugin also features the low level behaviour of RYM2612. Try reducing the level of your source signal and you’ll find the sound becomes more dominated by noise and distortion.