[sdiy] Tr-606 hats / cymbals

[Joel B]

Most analog drum synthesis I've encountered tends to be pretty weak on  
the hi hats and cymbals, mostly sounding like hi pass filtered white  
noise, but the 606 actually had metallic  sounding hats and cymbals.  
Does anyone know what technique Roland used to get this effect, and  
suggestions on avenues of exploration to create more metallic sounding  
analog percussion?

- Joel