The QY20 is a portable sequencer
released by Yamaha
. It has 8 track
s (4 for sequenceing and 4 accompaniment
tracks (2 chord, bass and drums (8 different drum set
s are available))).
For the sequencer you can use 100 different voices
(guitars, brass, strings and many others) which can be recorded in real time
- or in step-mode. The QY20 has an 1 octave keyboard
included, but for home use you can plug any MIDI
keyboard (even with attack dynamics (I hope this is the right word, if not please msg me the correct one) or any other MIDI device in. Unlike the QY70 it can not output complete songs directly, but has a MIDI output.
According to http://www.prepal.com/data/yamaha.htm the orginially 650 $ expensive device, which is now out of production can be purchased for round about 150$ when used.