MOTM

Hi,

--- In motm@yahoogroups.com, The Old Crow <oldcrow@o...> wrote:
> I increased the adjustment on the 485 to let it introduce "bad" IM
> distortion, because it sounded musically useful.  The bottom line
> is, they sound different.

I'm not sure if they demos show that (and if I listened to everything 
posted) since rather the "oddities" of the 
485 were shown off, but to me the 480 sounds nicer, more smooth. 

>   Yamaha must have had this great fear that a keyboard player would
> be able to place a filter in a state that made it appear as if the 
> instrument was broken; things like closing the high-pass filter all 
> the way such that no tone was heard.  

Ah, this infamous "where did my sound go?" question ;-)

> Thus, Yamaha built the GX1 HP-VCF to respond to 1/2
> Oct/V modulation wheres the LPF was 1V/Oct.  Similarly, the 
> CS80 HP filter
> is hardwired to track and half the distance as the LP filter on its
> modulation input.  On the MOTM-480, this hardwired behavior is 
> part of the FM input (1V/Oct still tracks the same for both 
> filters, same as in a real CS-80).

>   Hope this helps(?)

Sure!  Thanks a lot!

 Michael.