Question: The Roland MC-303 is the first of a series of musical instruments known as a Groovebox, the MC-303 has more in common with other MC prefixed synthesizers, which contain built-in sequencers, than it does with which famous bass synthesizer with built-in sequencer manufactured by the Roland Corporation?
Context: The Roland MC-909 Sampling Groovebox combines the features of a synthesizer, sequencer, and sampler, with extensive hands-on control of both the sound engine and the sequencing flow.  It was intended primarily for live performance of pre-programmed patterns consisting of up to 16 tracks of MIDI data.  It was released by Roland Corporation on October 8, 2002.  This product was announced at the AES Fall Convention in 2002.  It is the direct successor to the Roland MC-505, and is the predecessor to the Roland MC-808 which eventually ended the fortunate "Groovebox" line of products by Roland which began in the mid 1990s with the original MC-303. TR-Rec is short for TR Recording.  One of the Roland Corporation TR-Series drum machines, like Roland TR-808 and Roland TR-909 had these control features.  TR-REC mode lets you turn the desired notes on and off using the PADS on the Roland MC-303, Roland MC-307, Roland MC-505, Roland D2, Roland MC-909 and the new Roland MC-808.  You can see the notes onscreen or on the pads as you work. The Roland MC-505 is a groovebox conceived in 1998 as a combination of a MIDI controller, a music sequencer and a drum machine, and also has some of the prime features of synthesizers: arpeggiator, oscillators, voltage-controlled filter, control of attack, decay, sustain and release.  It was released as the successor to the Roland MC-303 and is a compact version of the Roland JX-305 Groovesynth without the full set of 61 keys.  It is also the predecessor to the Roland D2, Roland MC-307, Roland MC-909 and the Roland MC-808. The Roland MC-307 is a combination of MIDI music sequencer, synthesizer, drum machine and control surface produced by the Roland Corporation.  This combination is commonly referred to by Roland as a 'Groovebox' The Roland TB-303 Bass Line is a bass synthesizer with built-in sequencer manufactured by the Roland Corporation.  The TB-303 is a monophonic synthesizer, which means that it can only play one note at a time; it is monotimbral; it uses a sawtooth and square wave oscillator; and it has an 18dB low pass resonant filter.  The TB-303 is used by DJs and record producers to perform and program basslines. Released from 1981 to 1984, it had a defining role in the development of contemporary electronic dance music.  The TB-303 played an important role in the development of house music, influencing Chicago house.  The "squelchy" sound of the TB-303 was a key part of acid house's sound.  The TB-303 is also commonly used in related dance genres such as acid techno and acid trance.  In the 2010s, some DJs and record producers continue to use TB-303 units for their authentic tone and sound; as well, TB-303 basslines from vintage tracks have been sampled for use in 2010s-era songs.  As with any synthesizer, the TB-303 can be processed with effects units to produce different sounds. The Roland MC-202 (MicroComposer) is a monophonic analog synthesizer and music sequencer released by Roland in 1983.  It was the first groovebox.  Its synth is similar to the TB-303 bass synth and the SH-101 synthesizer, featuring one voltage-controlled oscillator with simultaneous saw and square/pulse-width waveforms.  It is a successor to the Microcomposer family of sequencers, including the MC-8 and MC-4.  The unit is portable and can be operated from batteries or an external power supply. The Roland MC-8 MicroComposer by the Roland Corporation was introduced in early 1977 at a list price of US$4,795 (¥1,200,000 JPY).  It was one of the earliest stand-alone microprocessor-driven CV/Gate music sequencers, following EMS "Sequencer 256" in 1971 and New England Digital's "ABLE computer" (microprocessor) in 1975.  Roland called the MC-8 a "computer music composer" and it was considered revolutionary at the time, introducing features such as a keypad to enter note information and 16 kilobytes of random access memory which allowed a maximum sequence length of 5200 notes, a huge step forward from the 8-16 step sequencers at the time.  It also allowed the user to allocate multiple pitch CVs to a single Gate channel, creating polyphonic parts within the overall sequence.  Due to the high price, only 200 units were sold worldwide, but it represented a huge leap forward in music technology. The Roland MC-808 is Roland's latest and final groovebox, announced at the Winter NAMM in 2006.  It is the successor to the late Roland MC-303, Roland MC-307, Roland MC-505 and Roland MC-909.  Though cheaper than the Roland MC-909, it has a number of features the Roland MC-909 lacked including double the polyphony (128-voice) and motorized faders.  It lacks SRX card expandability, and turntable emulation, which the Roland MC-909 has.  It supports more flash memory (1GB CompactFlash,) and more RAM (up to 1GB,) than did the Roland MC-909.  It has a 2-line segment built-in LCD that is less flexible - similar to the late Roland MC-505, and much smaller than the Roland MC-909 large LCD screen.  It also has a large LED display, similar to the late Roland MC-303.  The Roland MC-808 requires a USB connection to a computer for full patch editing, unlike the Roland MC-909.  (However, the OS v1.03 update available on the Roland website allows for some patch editing without a computer, most notably sample chopping, including auto-chop.) The term Groovebox was originally used by Roland Corporation to refer to its MC-303, released in 1996.  The term has since entered general use, and dates back to the Movement Computer Systems Drum Computer in 1981.  It refers to a self-contained instrument for the production of live, loop-based electronic music with a high degree of user control facilitating improvisation. The Roland MC-303 is the first of a series of musical instruments known as a Groovebox.  It combines a simple sound module with a sequencer to record and store notation, along with controls aimed at encouraging the musician to improvise the music while it is playing.  Despite the number in its name and the hype it received at its launch, the MC-303 has more in common with other MC prefixed synthesizers (such as the Roland MC-202), which contain built-in sequencers, than it does with the famous Roland TB-303.  As the first Groovebox, the MC-303 was the first in a line of inexpensive products specifically targeted towards house DJs and amateur home musicians rather than professional producers.  It was superseded by the Roland MC-505.  It is the predecessor to the Roland D2, Roland MC-307, Roland MC-909 and the Roland MC-808.
Answer: Roland TB-303