This is the latest official released operation systems by Oberheim for DMX. This operation system update/upgrade requires two eprom chips.

After purchase, please state your desired Set depending on your current DMX revision.

Check installed software version:

Press [3], [5] and [7] simultaneously.

Info about latest OS revisions:

·         2.21 – Latest OS for the [Basic units].

·         3.20 – Latest OS for units with [Memory expansion installed].

·         4.01 – Latest units with [Factory midi].

Features/improvements for 2.21:

·         Improved – New cassette routine to improve cassette interface reliability.

·         Fixed – Delay between sequences, while playing a song.

·         Fixed – Occasionally memory drops.

·         Fixed – Sync-to-tape compatibility between DMX and DSX

·         Fixing – Synchronizing to tape glitches.

·         Fixed – Occasionally wrong sequence is playing.

·         Added – Possibility to erase notes in “Record mode”