Hi ACSACS,
Such a "Legacy" Voice folder exists on many Yamaha arranger keyboard models. You can easily access that folder from the Voice Selection display (Preset tab) by pressing the upper "8" button ("up" arrow) to display the Voice category folders. On the SX600, the Legacy folder is on page 1 (P1) here. You can also select P2 for additional Voices (GM&XG and Mega Voices).
Please see page 3 in the SX600
Reference Manual ("Selecting MegaVoice, GM, XG, and GM2 voices").
See also the chapters "Voice List" and "Drum/SFX Kit List" in the SX600
Data List. All Preset Voices are listed there.
If needed, you can download all SX600 manuals here:
>>>
https://uk.yamaha.com/en/products/musical_instruments/keyboards/arranger_workstations/psr-sx600/downloads.html#product-tabsP.S.
The GM&XG Voices I mentioned cannot be shown/called up by default in the Voice Selection display for
keyboard parts (Right/Left parts) on newer models (probably also with the SX600), but can only used for MIDI songs or Styles). But you can still use the GM&XG Preset Voices in keyboard parts by downloading a zip file provided by Eileen, copying the contained folders with User Voices to a USB stick and using them from there. (You can also copy these User Voices from the USB stick to the User drive, because User Voice files are very small.)
Use the download link in this post:
>>>
https://www.psrtutorial.com/forum/index.php/topic,56679.msg441207.html#msg441207By the way, the GM&XG Voices are missing, as with other newer models, probably also in the SX600 Data List. If necessary, download the Tyros5 Data List, which also contains the GM&XG Voices:
>>>
https://uk.yamaha.com/en/support/manuals/index.html?l=en&c=keyboards&k=Tyros5Hope this helps!
Best regards,
Chris