[sdiy] Cyclone SID

[Rainer Buchty]

>Ringmod is generated by using the previous oscillator sign bit as the
>sign bit for the tri waveform. So when the master osc changes sign, the
>slave osc changes direction. Not XORed except in the generating of a
>tri wave.

Right you are... To cite Bob Yannes:

	"Ring Modulation was accomplished by substituting the
	accumulator MSB of an oscillator in the EXOR function of the
	triangle waveform generator with the accumulator MSB of the
	previous oscillator. That is why the triangle waveform must be
	selected to use Ring Modulation."

I got it mixed up with the tri generation.

Rainer