When importing an audio file into the SPD-SX PRO APP, if the filename, file path, or folder name contains multi-byte or special characters, the error message "Non-ascii characters are not supported." appears and the file cannot be imported.
Rename the file and folder using only standard ASCII characters on your computer, and try importing again. Be sure to check subfolders as well.
For more details, refer to “Importing an Audio File (IMPORT)” in the SPD-SX PRO Reference Manual, and the related article “What are the supported formats for audio files that can be imported?” in the SPD-SX PRO Reference Manual.