[sdiy] Kurzweil K1000 strange problem sounds solveable..

[Roy J. Tellason]

On Sunday 17 April 2005 12:07 pm, David Brown wrote:
> The timer is listed as an HD63A40, U48.  It's an obscure part to me. - Dave

63xx parts are Hitachi's CMOS equivalents to the 68xx parts (not 68xxx!) that 
Motorola came out with some years earlier.  They seemed to be pretty common 
in a lot of Yamaha gear,  In fact I have four HD63B03YP chips sitting here 
waiting for me to do something with them -- they were removed as a part of an 
upgrade where they were replaced with a masked rom part...

> At 08:52 AM 4/17/2005, Ingo Debus wrote:
> >Am Samstag, 16.04.05 um 22:47 Uhr schrieb Bob Weigel:
> >>Ok...I'm getting, even after hard reset, on any sound, a very obnoxious
> >>parsing of the sound being played back.  ALWAYS at the same points after
> >>attack.  Regardless of which sample is being played.  So I'm
> >>thinking...there's a missing line somewhere..
> >
> >If you ask me...  if there's a 82C54 in there, no surprise it doesn't work
> >properly. A very nasty chip.
> >
> >Ingo