Question: What company introduced a digital music workstation in 1992 and is the world's largest piano manufacturing company? A: Yamaha Corporation 

Context paragraphs:
Yamaha Motor Company: Yamaha Motor Company Limited (ヤマハ発動機株式会社 , Yamaha Hatsudōki Kabushiki-gaisha ) is a Japanese manufacturer of motorcycles, marine products such as boats and outboard motors, and other motorized products.  The company was established in 1955 upon separation from Yamaha Corporation (however Yamaha Corporation is still the largest shareholder with 12.21%, as of June 30, 2014), and is headquartered in Iwata, Shizuoka, Japan.  The company conducts development, production and marketing operations through 109 consolidated subsidiaries as of 2012.

Yamaha SY77: Yamaha SY77 is a 16 voice multitimbral music workstation first produced by Yamaha Corporation in 1989.  The SY77 is a synthesizer whose architecture combines AFM (Advanced Frequency Modulation) synthesis, AWM2 (Advanced Wave Memory 2) for ROM-borne sample-based synthesis, and the combination of these two methods christened Realtime Convolution and Modulation Synthesis (RCM).  The same technology was also packaged in a rack-mounted module released simultaneously, the TG77.

Yamaha QY10: The Yamaha QY10 is a hand-held music workstation produced by the Yamaha Corporation in the early 1990s.  Possessing a MIDI sequencer, a tone generator and a tiny single-octave keyboard, the portable and battery-powered QY10 enables a musician to compose music while traveling.

Yamaha Motif: The Yamaha Motif is a series of music workstation synthesizers, first released by Yamaha Corporation in August 2001.  The Motif replaced the EX series in Yamaha's line-up.  Other workstations in the same class are the Korg Kronos, Roland Fantom G.

Yamaha MM6: The Yamaha MM6 is a compact synthesizer manufactured by the Yamaha Corporation, and was first introduced in January 2007.  The MM6 includes fairly high quality samples for the price of the keyboard, however it is still a professional level piece of equipment.  The default samples that is provided on board the MM6 are based on the Yamaha Motif series workstation sound sets.  This synthesizer comes with 418 patches, and 22 drum kits, all based upon those that available with the Motif series workstations.

Yamaha V50: The Yamaha V50 is a digital music workstation introduced in 1989.  It combines a sequencer, rhythm machine, a FM synthesis - based sound module and a MIDI keyboard.

Yamaha Corporation: Yamaha Corporation (ヤマハ株式会社 , Yamaha Kabushiki Gaisha ) ( or ; ] ) is a Japanese multinational corporation and conglomerate based in Japan with a very wide range of products and services, predominantly musical instruments, electronics, and power sports equipment.  It is one of the constituents of Nikkei 225 and is the world's largest piano manufacturing company.  The former motorcycle division became independent from the main company in 1955, forming Yamaha Motor Co., Ltd, although Yamaha Corporation is still the largest shareholder.

Cable Piano Company: The Cable Piano Company or simply "Cable Company" was an American piano manufacturing company founded by Herman D. Cable in 1880.  It was one of the largest piano makers in Chicago.  It claimed to be "the world's greatest manufacturer of pianos, inner player pianos, and organs".  In 1901, the company built a factory in St. Charles on 3.5 acres west of the Fox River.

Yamaha Tyros2: The Yamaha Tyros2 is a digital arranger workstation keyboard produced by Yamaha Corporation in 2005.  It was produced and designed by Kazuhisa Ueki and Soichiro Tanaka, respectively.  The Tyros2 introduced several new features to the Tyros series, such as 'SuperArticulation!  Voices', allowing for more realistic sounding voices during performances, and hard-disk recording allowing users to export audio recordings.  Many features seen in the original Tyros returned to the Tyros2, including MegaVoice, primarily used in MIDI recording, which use velocity switching to add realism; Live! , Sweet!  and Cool!  voices, that are sampled using stereo and multilayered samples to better capture the natural presence expression and vibrato of the real instruments; and Internet Direct Connection, allowing users to download content directly to the instrument.

Yamaha SY85: The Yamaha SY85 is a digital music workstation introduced in 1992.  Unlike other Yamaha synthesizers of the time (SY77 and the SY99) the SY85 does not use FM synthesis.  Instead, its sounds are based on samples, which can be layered and modified to create new sounds.

Supporting paragraphs: Yamaha SY85 Yamaha Corporation
Answer: Yamaha Corporation