Question: The Rhythm Composer is driven by what type of tracks? 
Context: The Roland TR-808 Rhythm Composer, often referred to as the 808, is a drum machine introduced by the Roland Corporation in 1980 and discontinued in 1983.  It was one of the earliest programmable drum machines, with which users could create their own rhythms rather than having to use preset patterns. The Roland TR-707 Rhythm Composer is a programmable digital sample-based drum machine built by the Roland Corporation, beginning in 1984.  The TR-707 was a staple in early house music, particularly with acid house.  It is also a staple of almost all electronic Arabic pop music (al jeel).  Because the TR-707 offers a limited number of instruments sampled at 12 bits, its sound is considered dated by modern standards.  However, it is still in use because of its versatility in synchronizing with other hardware and its fully featured interface, comparable to that of high-end Roland drum machines such as the TR-808 and TR-909. Riddim Driven: Trilogy Pt. 2 & Ole Sore is the twelfth installment in VP Records' "Riddim Driven" series.  It was released in August 2001 on CD and LP.  The album features various artists recorded over two riddim tracks, produced by King Jammy as well as Ward 21 Productions.  The first eight tracks are across the "Trilogy" riddim, while the last eight tracks are across the "Ole Sore" riddim.  The "Trilogy" riddim was previously featured on the , making it the first riddim to be revisited by the series.  Tracks 7, 8, 15, and 16 only appear on the CD release. Riddim Driven: Mr Brown Meets Number One is the seventeenth album in VP Records' "Riddim Driven" series.  It was released in December 2001 on CD and LP.  The album, produced by Donovan Germain, features various artists recorded over re-licks of two classic reggae riddims from Gregory Isaacs.  The first six tracks are across Isaacs' "Mr. Brown" riddim, while the last 10 are over his "Number One" riddim.  Both tunes were big hits for Isaacs' during the 1970s and he records updated versions of both on this compilation.  The last four tracks only appear on the CD edition.  They are replaced on the vinyl edition by two version tracks, one before the Isaacs & Griffiths duet and the second at the very end. The R-8 Human Rhythm Composer is an electronic drum machine introduced in 1989 by Roland Corporation, using PCM voices.  The R-8 features velocity- and pressure-sensitive trigger pads, and the ability to create loops of beats.  The device has eight individual outputs, 32-voice polyphony, and four-part multitimbral MIDI. BGM is the fourth studio album by Yellow Magic Orchestra, released on March 21, 1981.  The title stands for "Background music".  This album was produced by Haruomi Hosono.  YMO was the first band to use the Roland TR-808 Rhythm Composer, one of the first programmable drum machines, as early as 1980.  This was their first studio album recorded with the Roland MC-4 Microcomposer and TR-808. The Roland TR-909 Rhythm Composer is a drum machine introduced by the Roland Corporation in 1983.  It was the first Roland drum machine to use samples (for its cymbal and hi-hat sounds) alongside analog sounds.  Designed by Tadao Kikumoto, who also designed the Roland TB-303 synthesizer, the 909 features a 16-step step sequencer and drum sounds that aimed for realism and cost-effectiveness.  It is fully programmable, and like its predecessor, the TR-808, it can store entire songs with multiple sections, as opposed to simply storing patterns.  It was the first MIDI-equipped drum machine.  Around 10,000 units were produced. A rice transplanter is a specialized transplanter fitted to transplant rice seedlings onto paddy field.  Mainly two types of rice transplanter i.e., riding type and walking type.  Riding type is power driven and can usually transplant six lines in one pass.  On the other hand, walking type is manually driven and can usually transplant four lines in one pass. The Type 95 So-Ki was an armored railroad car of the Imperial Japanese Army.  It was used for patrolling and guarding railway lines in both Manchuria and Burma.  The chassis was based on the Type 95 Ha-Go Light Tank.  The Type 95 So-Ki had light armor and no weapons armament.  It had a simple suspension system with bogie wheels suspended on bell cranks on each side of the chassis.  The tracks were driven through the front sprockets.  There were three small return wheels. Ghetto house, booty house or G-house is a genre of Chicago house which started being recognized as a distinct style from around 1992 onwards.  It features minimal 808 and 909 drum machine-driven tracks and sometimes sexually explicit lyrics.
Answer: machine-driven tracks