Led by Josh Harlow (on piano, synth, and electronics) and Jonathan Barahal Taylor (drum set, percussion, synth arrangements), the independent outfit Teiku featuring bass clarinetist Jason Stein performs a special headlining engagement at Rock Island venue Rozz-Tox on September 27, the ensemble designed to reflects its leaders’ musical and spiritual sensibilities: a yearning for insight, an acute sensitivity to the present moment, and a space made for searching deeper.