The PSR‑S970 uses Yamaha "Expansion" voice packs (VOI/VCM/AIFF samples inside a Yamaha-compatible pack) and third‑party voice libraries made for PSR‑S/ Tyros/Genos family keyboards. You can add new sampled voices (and full expansion packs that include styles and registrations) via USB flash drive or a computer using Yamaha utilities.
To expand the sound palette of your Yamaha PSR-S970, you can download and install new voices through official expansion packs or customized third-party files. The instrument supports approximately 512MB of expansion voice data, allowing you to load high-quality samples from around the world. Official Yamaha Expansion Packs yamaha psr-s970 voices download
One of the PSR-S970's strongest selling points is its ability to be customized through Voice & Style Expansion Packs [ ] Is the file format compatible with S-Series
Click "Import Pack." Navigate to the .ppf (unprotected pack) or .cpf (protected pack) you downloaded. The voices will appear in the left panel. Congratulations
Congratulations. Your new voices are now accessible via the Expansion button directly on the PSR-S970’s front panel.