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

[Veronica Merryfield]

On 3-May-09, at 11:21 PM, Aaron Lanterman wrote:
> 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.

He also talked about the rate of rise of the attack.

Veronica