[music-dsp] ring modulation

[Eric Brombaugh]

On 10/16/2010 03:48 PM, Alan Wolfe wrote:
> When you do ring modulation, you are just multiplying 2 sound waves
> together right?
>
> I'm trying to implement this in a synth program where my sound data is
> in the range of -1 to 1.
>
> Should both sound waves be in this range or should the modulation wave
> be in the range of 0 to 1?

If the modulation wave stays in the range [0:1] then your carrier won't 
be nulled out. If the modulation wave ranges over [-1:1] then then 
carrier will be completely suppressed (assuming that the mean value of 
the modulation wave is 0) and you'll be left with just the sum & 
difference frequencies from the carrier & modulation.

Eric