All three titles can be enjoyed without any playback issues. ① July 14, 1964, Kosei Nenkin Tokyo Hall Live... Sam Rivers (ts), Hancock (p), Ron Carter (bs), Tony Williams (dr), Miles Davis (tp). The performance of SO WHAT is, needless to say, a peak live performance. I recommend this milestone now! ② Keyboards: Hancock, Brother Brecker (sax), Roy Hargrove's trumpet. The accuracy of the ad-libs, the core sound, the speed... forever... a session live that will blow you away. ③ East River, Bebop, with Michael Brecker (tenor sax) and Randy Brecker (trumpet), a harmony that only brothers can achieve, in perfect sync. It's wonderful, I recommend it now! Please consider this opportunity.