custom drum rhythms. Lead Voice The solo voice typically used for the melody line. Lead voices are monophonic on all Electone models. Lower Keyboard Voice General term referring to sounds selected and assigned to the lower keyboard. Polyphonic by preset. Music Data Recorder (MDR, before Electone Stagea named Music Disc Recorder) Memory storage device installed to, or part of Electone models from the HS series onwards. Allows storage and quick call up of complex sound and rhythm settings. Melody On Chord (MOC) Harmonizing effect activated on the lower keyboard based on note played on the upper keyboard. Pedal Voice General term referring to sounds selected and assigned to the pedalboard. Monophonic by preset except on the latest ELS-02 series. Registration Electone term referring to sounds selected for each keyboard and the pedal board. Includes also rhythm pattern selected. Also refers to user memory slots available on the Electone itself. Rhythm Drum patterns available on the Electone. Comes with different accompaniments. Rhythm Sequence Program (RSP) Sequencing function used to string different rhythm patterns together. When activated, the entire sequence plays by itself regardless of sound or memory changes on the Electone, thus allowing the player to concentrate on performance. Also allows for auto changing of registrations. Rhythm Pattern Program (RPP) Programming function for designing custom drum patterns and accompaniments. Upper Keyboard Voice General term referring to sounds selected and assigned to the upper keyboard. Polyphonic by preset. Virtual Acoustic Yamaha's sound modelling technology introduced with the EL900 in 1998. Features higher realism compared to Frequency Modulation. Continues to be available in top end models as of 2014. Voices General term referring to sounds on the Electone. STAGEA series In 2004, Yamaha launched the STAGEA series. This series uses all AWM (Advanced Wave Memory) voices and features over 180 digital effects, built-in registration menus, VA (Virtual Acoustic) voices, and a Style-File compatible expanded rhythm and accompaniment section. AWM is the proprietary sound sampling technology of Yamaha. Models in this series are: ELS-01: The standard model ELS-01C: The custom model, carrying the ability to use the VA voices, Pitch and Tempo Bends, After touch on the pedal keyboard, horizontal touch and after pitch, along with other features, and lastly, ELS-01X: The professional model - taking the ELS-01C, it adds 61-note keyboards, a 25-note pedal board and XLR external audio jacks. The STAGEA ELS-01 series was officially distributed only in Asian countries.In 2006, Yamaha