Disklavier

I can play some PianoDisc CDs on my Mark III but not others.  
Apparently the newer ones have a different encryption that the Mark 
III cannot decode.  I don't know how to predict which ones will and 
will not work, so unfortunately I have purchased some that are 
useless to me.

I wonder if there's any way to do a software upgrade on the Mark III 
to overcome this problem? 


--- In disklavier@yahoogroups.com, "iski1alan" <ISKI1@...> wrote:
>
> Has anyone been able to play a PianoDisc brand CD on a Yamaha Mark 
III.
> 
> I have a friend that has a Mark IV and he can play PianoDisc CD's 
but I 
> have not been able to play them on my Mark III.  I was wondering 
if 
> there was a problem with my player or only certin PianoDisc CD's 
will 
> play on a Disklavier.
> PianoDisc has some very nice selections but I don't want to spend 
money 
> trying.
> Maybe only older ones or newer ones will play?????
> Thanks
> Alan
>