[sdiy] Re: FPGA 2-OP FM MIDI Polysynth

[Aaron Lanterman]

On May 4, 2009, at 2:17 AM, Veronica Merryfield wrote:

>
> On 3-May-09, at 1:56 PM, Aaron Lanterman wrote:
>
>>>> The Synergy used a similar-in-spirit trick for additive synthesis  
>>>> that did away with hardware multiplies by using trignometric  
>>>> properties; instead of doing a multiply, you'd look up two phase- 
>>>> shifted sinusoids and add them.
>
> Hal, the designer, maintains that the spectral properties of using  
> this technique for amplitude control are different to that when  
> using a multiplier.

I'm sure they are - there will be a varying phase shift running along  
with the amplitude change.

- Aaron