Has anyone ever used the SID's phase-accumulating oscillators together with a fast frequency register routine to generate phase-modulated sounds? I'm thinking about the possibilities of running a tight loop constantly re-writing the high frequency register to add different values to the phase-accumulating oscillators in triangle waveform mode to produce arbitrary 11 bit waveforms. The slew rate is limited by the maximum number you can add to the oscillators every cycle, which produces 4kHz triangle waves. However, a sinusoidal wave with that gradient at t=0 wouldn't be much lower, and there are all sorts of other noises one can imagine. This can all done even better on SuperCPU machines where you can write to the sound chip every 1MHz bus cycle. Richard - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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