The Yamaha QY10 is a portable music workstation that was released in 1991. It is a compact and battery-powered device that features a MIDI sequencer, a tone generator, and a small keyboard. The QY10 was popular among musicians and producers for its portability and ease of use.

Here are some of the key features of this classic gear:

• MIDI sequencer: The QY10's sequencer can record and playback MIDI data. It has a resolution of 48 ppqn (pulses per quarter note) and can store up to 99 patterns and 99 songs.
• Tone generator: The QY10's tone generator is based on Yamaha's Advanced Wave Memory (AWM) synthesis technology. It features 30 instrument sounds and one drum kit. The sounds are not editable, but they can be transposed and panned.
• Keyboard: The QY10's keyboard is a single-octave keyboard to be used to play and record notes, as well as to control the sequencer and tone generator.
• Other features: The QY10 also includes a number of other features, such as a metronome, a chorus effect, and a MIDI interface.

The Yamaha QY10 is a versatile music workstation that can be used for a variety of purposes, such as songwriting and practicing. It is a popular choice for musicians who are looking for a portable device with a bit of nostalgia.