Quartet is the top‑selling jazz play‑along app for instrumentalists and vocalists at every level — a #1 music app in 51 countries.
Here’s why our users rate it 4.8/5* (worldwide):

• 100% live audio. You’re hearing a real jazz quartet — recorded by world‑class players — not a canned, pre‑programmed simulated band accompaniment.
• The modern Aebersold, supercharged. Think the groundbreaking Jamey Aebersold play‑along series, but with far more standards and cutting‑edge audio tools for today’s practice and performance. And a fraction of the price.
• Total musical control. Set repeats, choose your tempo and key, build custom playlists, and even export multitracks to remix parts your way. That’s realplay.
• 650+ essential standards (and growing). While Quartet isn’t a substitute for The Real Book, it is the ultimate library of high‑quality backing tracks for all the tunes you really want to play.

Most importantly, it swings. Because the band is real — 10 of the world’s most in‑demand jazz musicians.
Featured artists include…

• Sebastiaan de Krom (drums) — Herbie Hancock, John Scofield, Dave Holland, Jamie Cullum, Guy Barker, Wynton Marsalis
• Graham Harvey (piano) — George Benson, Stacey Kent, Madeline Bell, Incognito (MD)
• Geoff Gascoyne (bass) — Sting, Jamie Cullum (MD), Charlie Watts, Van Morrison, Georgie Fame, Jacqui Dankworth, John Martyn, Mari Wilson, Bob Dorough, Dianne Reeves, Guy Barker
• Andy Panayi (sax, flutes) — Paul McCartney, Elton John, Freddie Hubbard, Wynton Marsalis, Joe Lovano, Roy Hargrove, Phil Woods, Billy Cobham
• Rod Youngs (drums) — Lee Konitz, Courtney Pine, Jon Hendricks, Natalie Cole, Mica Paris, Bennie Maupin, Carleen Anderson, Jocelyn Brown, Abdullah Ibrahim
• Dave O’Higgins (sax) — Wayne Shorter, Joey Calderazzo, Joe Locke, Max Ionata, Joe Lovano, Phil Woods, Peggy Lee, Nancy Wilson, Jamie Cullum, Stéphane Grappelli, Michel Legrand
• Graeme Blevins (sax) — Phil Collins, Kylie Minogue, Quincy Jones, Taylor Swift, Martha Reeves, Robbie Williams, Mark Knopfler

Real play. Real book. Real musicians. Quartet.