| recordings |
|---|
| 1964-06-02 | Four Systems - For Four Amplified Cymbals | | Max Neuhaus | 4:54 |
| 1965 | Four Systems - For Four Amplified Cymbals | | Max Neuhaus | 10:12 |
| 1968-06 | Four Systems - For Four Amplified Cymbals | | Max Neuhaus | 5:02 |
| 1993-12-16 – 1993-12-17 | 4 Systems | | Eberhard Blum, Steffen Schleiermacher, Jan Williams | 8:10 |
| 2005-06-09 – 2005-06-10 | Four Systems | | Joan La Barbara, Kenji Bunch, Yves Dharamraj, Cornelius Dufallo, Stephen Gosling, Ariana Kim, Chris McIntyre, Brian McWhorter, Taimur Sullivan, Aaron Trant | 4:00 |
| 4 Systems | | Gentle Fire | 8:25 |
| Folio: Four Systems | | Michael Daugherty | 3:28 |
| Four Systems | | Horacio Vaggione, Pedro Echarte | 2:30 |
| Four Systems | | Max Neuhaus | 5:09 |
| Four Systems | | Ensemble Musica Negativa, Earle Brown | ?:?? |
| Four Systems 1954 | | Sam Hillmer, Alex Hoskins, Matthew Hough, Charlie Looker, Alex Mincek, Brad Wentworth, Zs | 3:08 |
| Four Systems 1954 | | Wadada Leo Smith | 2:30 |
