Tracklist
| 1 | X1 | 3:45 | |
| 2 | X2 | 1:40 | |
| 3 | X3 | 1:56 | |
| 4 | X4 | 4:09 | |
| 5 | X5 | 1:29 | |
| 6 | X6 | 3:52 | |
| 7 | X7 | 3:31 | |
| 8 | X8 | 1:08 | |
| 9 | X9 | 2:19 | |
| 10 | X10 | 2:37 | |
| 11 | Study No. 11 | 3:43 | |
| 12 | X12 | 4:12 |
"Det Foranderlige Instrument" music for 24 Yamaha DX-7 synthesizers by Danish composer, musician and teacher Anders P Jensen. Departing from its iconic 80s pop sound, Anders P Jensen breathes new life into the DX-7, leveraging complex instrument preparations inspired by musical luminaries like Harry Partch and Björk, resulting in mesmerizing electronic symphony across 12 movements, where the instrument evolves autonomously, challenging conventional notions of composition. Besides Anders P Jensen on synthesizers, the album also features Zhang Yu on guzheng. "Study No. 11" is composed by Conlon Nancarrow, here arranged for the DX-7s. "Det Foranderlige Instrument" which translates as "The Ever Changing Instrument" is Anders P Jensen second release on Escho.