Sequencer
The main feature of the QY10 is its eight track sequencer. With its "pattern"-based design, it was more suited to supporting song writing rather than creating full musical compositions.
A pattern is a short sequence of backing music played on bass guitar, percussion and two other instruments. Patterns for various musical styles are built into the QY10, for example European house music, rhythm and blues and bossa nova. Users may also write their own patterns, which must be written in the key of C major. When playing a song, the QY10 automatically rescales patterns to match a selected chord.
The eight tracks of the sequencer are thus divided into two groups: four standard sequencer tracks and four tracks dedicated to pattern playback. The latter are typically programmed as one "backing track" which stores a sequence of pattern numbers and chord changes.
The QY10's sequencer data is maintained by an internal back-up battery, but it may be also be stored externally by transferring it to a suitable device (e.g. a MIDI equipped computer).
Read more about this topic: Yamaha QY10