OBERHEIM SYNTH

Hi out there !
Does anyone have any knowledge, experience or information about what 
the MC-1000 master keyboard possibility to install an optional 
WaveBlaster Soundcard in the MC-1000 really means ?
The WaveBlaster is an old soundcard and could be very hard to find,
or 
is it possible to install something similar or a "compatible" sound 
card instead ? 
Can anyone tell me how all this works on th MC-1000 ?
Have searched the net, but no answers found. Have even sent questions 
to Viscount, but noone seem to take time to answer...
/Ruben