Observing Systems

Observing Systems is the fourth studio album by German electronic and jazz band Tied & Tickled Trio. It was released on 8 September 2003 by Morr Music.

Personnel
Credits are adapted from the album's liner notes.

Tied & Tickled Trio
 * Markus Acher – drums, percussion, sampler, turntables
 * Micha Acher – electric bass, trumpet, piano, organ, conducting
 * Johannes Enders – tenor saxophone, flute, piano
 * Andreas Gerth – electronics, processing
 * Ulrich Wangenheim – bass clarinet, flute

Additional musicians
 * Roberto Di Gioia – piano, organ
 * Leo Gmelch – tuba, bass trombone
 * Gerhard Gschlößl – trombone
 * Robert Klinger – double bass
 * Carl Oesterhelt – percussion
 * Saam Schlamminger – zarb
 * Stefan Schreiber – tenor saxophone, clarinet

Production
 * Markus Acher – production, mixing
 * Andreas Gerth – production, mixing
 * Michael Heilrath – mastering
 * Martin Schulze – recording (assistant)
 * Mario Thaler – production, mixing, recording

Design
 * Jan Kruse – cover artwork
 * Gerald von Foris – photography