Re:Yamaha’s DX7 synthesiser changed modern music
by walto2 on Friday January 01, 2021 @10:37AM
(#25603951)
> A second-order digital filter requires what, about 4 stores, recalls, and multiplies per sample?
This is true today using something like the Chamberlin form for a state variable filter. I don't think that level of optimization had been discovered yet in the DX7 timeframe.
Also, for adequate quality you want to oversample at least 2x, preferably at least 4x.
And 16 bits usually won't be enough headroom in a digital filter for good audio quality. Too much truncation.
This is true today using something like the Chamberlin form for a state variable filter. I don't think that level of optimization had been discovered yet in the DX7 timeframe.
Also, for adequate quality you want to oversample at least 2x, preferably at least 4x.
And 16 bits usually won't be enough headroom in a digital filter for good audio quality. Too much truncation.