The Mellotron M4000D Micro is the smallest keyboard version available of the Digital Mellotron, and includes many of the features of the full-size version. It includes one hundred 24-bit uncompressed sounds sourced from original first-generation Mellotron and Chamberlin tape libraries. Sound Card 01 is the built-in library for the Micro and M4000D series of instruments. 
 
To update your Micro Rev 2, please use the Mellotron Updater app (iOS only).  This update process uses Bluetooth and takes less than 1 minute. The Rev 2 Micro is the revision without the SD slot in the back. We are sorry, but we cannot support the Android app anymore. Google has made the app management procedure too complicated for small businesses that provide free apps.
 
On the Rev 1 the SD slot is between the MIDI jacks and the Phones jack. The Rev 1 needs to be updated with an SD card. If you'd like to update your Rev 1 Micro, please fill out this form, or go to https://digitalmellotron.com/update