A .rar file is a compressed archive. It likely contains high-quality audio recordings (such as FLAC or MP3) or video clips of the 4th session or a 4th part of a specific set.
Files ending in .rar from unknown online sources can occasionally contain malware. Always scan with updated antivirus software before extracting. Blue Jay Jazz Jam
Captures the unique energy of a live "listening room" environment where the focus is strictly on the music.
Expect an emphasis on improvisation, complex chords, and rhythmic "groove" . These sessions typically feature a house band accompanied by guest musicians, resulting in a raw, organic live sound rather than a polished studio production. Quality Review
As an unofficial archive file, the audio quality can vary depending on the recording source (board mix vs. room mic).