After the purchase you can download backing tracks and notes in three versions.
for alto saxophone, tenor saxophone and for violin
Also in the archive there will be 3 video files with notes for different instruments. It will be very easy for you to learn from them and you will not lose the place where the music sounds.
Still additionally, as a bonus, the classic version for alto, tenor or soprano saxophone is loaded, but they are in other keys of D major, B Flat Major (Notes are also attached)