Approximationes is 76 minutes of free jazz improvisations, divided into 18 tracks, by the Hungarian group Kada Ad Libitum, an offshoot of Kada. Kada Ad Libitum is a new formation originating from this studio recording on March 28, 2005. In fact, this collective improvisation is preserved on Approximationes. The roots of this kind of musical approach can be found in the band Kada, founded by guitar player Laszlo Valik, in which Daniel Vaczi plays soprano and alto saxes, Andras Mohay plays drums, and bass player Matyas Szandai forms the most welcomed rhythm section of their generation. Instrumental Guitar (Electric/Fusion), total running time, 76:01