Go to Instagram Reel upload page and tap the Audio button.
Image Source : InstagramBrowse music and original audio to find the perfect track.
Image Source : InstagramSlide the timeline to select the part of the track you want to use.
Image Source : InstagramTap "Done" then select "Next" to finish editing your Reel.
Image Source : InstagramAdd a caption, tag people, and share your Reel with your followers by tapping "Share"
Image Source : InstagramNext : Download Instagram Reel in 4 basic steps