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 VOPM by Sam is a Virtual Instrument Audio Plugin for Windows, Mac OS X and Linux. It functions as a VST Plugin.
Product VOPM
Developer Sam
Price (MSRP) Free
Type / Tags
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
 0.1.7  Downloads Released
 0.1.5  Downloads Released
 0.1.?  Downloads Released
Miscellaneous Information
Copy ProtectionNone
Other / Unknown

VOPM is an emulation of the Yamaha YM2151 (OPM) 4 operator FM sound chip.


  • Yamaha YM2151 (OPM) 4 operator FM sound chip emulation.
  • Supports MIDI CCs.
Discussion: Active


26 August 2013 at 5:08ammridlen

Here's a ton of patches (*.opm files) from Sega Genesis games: http://truechiptilldeath.com/blog/2010/05/04/opm-patches-out-of-most-genesis-games/


1 March 2015 at 8:26pmmrkenallen

This library will not work on the Mac version because, while these are technically text files, they are Windows text files, and the Mac version of this VST only seems to understand Unix text files. The difference is DOS and Windows text files end with both the line feed and carriage return ASCII characters, where Unix text files end with just the line feed.

There are some methods of converting between the two file formats, but with more than 2600 files in this archive, anyone undertaking a conversion is in for a long slog.

1 March 2015 at 10:11pmBlackWinny

You can use this native OS X batch command quasi-unknown by the users but which works very, very well:


5 July 2015 at 6:49pmclbna

I cant get Black Winny's command to work, can you please explain how do you convert opm files to be mac readable ?

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Average user rating of 10.00 from 1 review

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