A seasoned quartet of trombonist Robert Morgenthaler, vibraphonist Christopher Dell, bassist Fridolin Blumer, and percussionist Heinz Geisser recorded in Zurich, exploring the essence of free improvisation through deep listening and spontaneous structure, where interplay and attentiveness replace convention, revealing the magic that happens in the space between the rules.

The long-running quartet of percussionist Heinz Geisser, bassist Fridolin Blumer, pianist Reto Staub and trombonist Robert Morgenthaler have for years extended their 4-tet with a 5th guest, here asking vibraphonist Christopher Dell to join them in the studio after a successful live performance in the spring of 2022, capturing this spectacular, wide-ranging example of collective improvisation.