An r3a file extension is related to the RS7000 music composing software. An r3a file contains sample data.
R3A file extension - RS7000 sample data
What is r3a file? How to open r3a files?
File type specification:
The r3a file extension is associated with RS7000 Music Production Studio, developed by Yamaha Corporation.
Most likely some old format without support from developer. No further information could be found.
This r3a file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.