No, it is not possible at all. The reason is because the real tracks are actual recordings of real instruments played by real musicians to give you real performances with your backing tracks or songs. PG music does have a built in sample library that uses the sforzando formate but I highly suggest that you purchase high quality sample libraries and know how to voice them correctly with a keyboard or midi guitar. Since you want to use a bass, I recommend you check out Orangetree samples. I have their Jaco fretless bass sample and it sounds great.

Computer: Macbook Pro, 16 inch 2021
DAWs: Pro Tools, Logic, and Maschine
plays drums, percussion, bass, steel pan, keyboard,
music producer/engineer