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What is Expansion Packs

A Yamaha Expansion Pack is a package which adds more content to the keyboard:
- Voices
- Styles (optional)

Voices and styles are merged into a file, having a "yep" or "ppi" extension.

Some expansion packs contain Registrations and/or MultiPads. These data are not included in the "yep/ppi" file.

Where to get

Expansion Packs can be obtained from Yamaha Shop at

Besides the Expansion Packs for sale, some free Expansion Packs can be found at Free Expansion Packs


Expansion Packs for Genos, Tyros 5, Tyros 4, PSR S970, PSR S770 and PSR S670 is a new common format. File extension "ppi".

Expansion Packs for the PSR A2000, PSR S750 and PSR S950 have the same format. File extension "yep".

Expansion Packs for PSR S650 is another format. File extension "yep".

The size of Expansion Packs is limited by the keyboards storing capacity.


The "ppi"/"yep" file is the installation file of the pack which goes into the keyboard.

Only one "ppi"/"yep" file can be installed in a keyboard at the same time.

However more "ppi"/"yep" files can be merged into one "ppi" file. See more below!

Software for Expansion Packs

Yamaha Expansion Manager (YEM)

For creating "ppi" files from different expansion packs; both "ppi" and "yep" file formats can be used - but only the styles of "yep" files.

The software creates a "ppf" file, which is the project file.

When you save this, the expansion manager software creates the "ppi" file.

Yamaha Expansion Manager (win)

Yamaha Expansion Manager (mac)

Styles In YEP/PPI Files

This software will extract the style files from Expansion Packs. No voice extraction!

Styles In YEP/PPI Files.

YEP Voice Manager

This software is for managing "yep" files. Adding/removing voices and/or styles.

YEP Voice Manager exe

Voice editing software

If the voice is in wave format you can use Goldwave or another Digital Audio Editor.

If it is uTG format... Sorry, no luck...

Expansion Voice Editor

This software is for creating "yep" files. This is a Yamaha software program. The program and the manual are not available for public. Sorry...

More about "yep"

A lot of information about "yep" files can be found here.