Yamaha Electone EL-57 Owner's Manual page 67

Outline of M.D.R. Operation
Though the M.D.R. is as easy to operate as a cassette tape recorder, it is far move versatil. Since it records all
Electone settings and control movements as well as the notes you play as digital data, it allows you much more
flexibility and control than even the most sophisticated tape recorder. Basically, the M.D.R. independently records
the following three types of data:
1. Registration data (including Bulk data)
All registrations stored to the Registration Memory numbered buttons as well as the registration currently set to the
panel, are recorded at the beginning of a song, before the actual recording of your performance. Bulk data is also
saved to the song with the Registration data. Bulk data includes: Registration Shift settings, Rhythm Pattern (User
rhythms) and Rhythm Sequence data, and User voices.
2. Performance data
The M.D.R. records your performance on the keyboards and pedalboard of the Electone exactly as you play it, even
recording the strength at which you play the keys and how hard you press them down while playing. The various
types of performance data--Upper, Lower, Pedal and Lead--are recorded to independent "tracks," so that you can
change any one of them without affecting the others.
3. Control data
All changes you make on the Electone during your performance are recorded in real time. These include
registration changes, the use of the expression pedals, footswitches and knee lever.
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