The PSR-E models support the "SFF1" version of Yamaha's style file format, so any style files that are in the "SFF2" (a.k.a. "SFF-GE") format must be converted to the "SFF1" format using a utility such as the
Style Format 2 Converter program.
Additionally, the style file names must use the ".sty" file extension; and since any extra sections such as the "OTS" section won't work, they can be removed. This can be done using the
Style Old Format Converter program. When using this utility, you can check (select) all options
except for "Max. resolution 480" and "Use GM voices," because it's okay to use resolutions over 480 and non-GM voices.
Although it's okay for the style files to contain all four variations of the Intro, Main, Fill In, and Ending sections, the PSR-E models can use only two variations-- "A" and "B"-- so it's a good idea to use the
Style Remixer program to move whichever variations you want to keep to the "A" and "B" positions and remove the others.
The style files must not be too large-- the maximum file size that will work is approximately 50kB-- so if a file is too large then it should be reduced in size using some method. Note that "remixing" the style's variations using the aforementioned program will reduce the file's size, but if it's still too large then it might be necessary to find additional ways to reduce its size. For instance, many (most?) styles for the PSR-E models seem to use only one Intro and one Ending section, even though they can actually use two Intro and two Ending sections, so you might want to remove one or the other of the Intro and Ending sections.
Next comes what can be one of the most important steps-- using a utility such as the
Style Revoicer program to replace any voices that aren't available on your specific keyboard model with suitable voices that are available. And even if a style uses voices which are available on your keyboard, you still may want to replace them with better-sounding voices-- for example, you may want to replace "GM" and "XG" voices with appropriate "panel" voices.
The steps described above may sound lengthy and complicated, but they aren't as difficult or confusing as they might at first seem, and after you've processed a few style files and gotten used to the procedure then it should go more quickly and easily. Note that the final step-- revoicing the style-- can be omitted in many (most?) cases, because often times if the keyboard encounters a request for a voice it doesn't have, it will automatically choose a voice that it does have. This is not always the case, in which case the part that uses the requested voice will probably be "silent"; so you can generally skip the revoicing step unless the style obviously doesn't sound right, in which case you can revoice it as desired.