what's the sound blaster?
what's the OPL2 FM chip?
if there are any other types of OPL eg:OPL1 and how it work?
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what's the sound blaster?

It's a brand of sound board made by Creative Labs.  

what's the OPL2 FM chip?

It's a chip used on many sound boards.

if there are any other types of OPL eg:OPL1 and how it work?

Maybe.  I've never heard of the OPL1 but it seems reasonable to expect if there is an OPL2, that an OPL1 might exist.

Contact the manufacturer and get a data sheet to see how it works...

What do you _REALLY_ want to know?

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