I can only add that the Vocal processing and harmonizer are very good as well. No gadget voices in the harmonizer, but various harmonies ranging from 2 to 4 parts.
Both vocal and harmony voice can be fully e.q.'d, and have compressor, limiter, reverb and delay available.
There are two XLR inputs for mics, and the volumes of both main and harmony voice have dedicated sliders.
The Audya also easily reads USB drives and all media, including songs, styles, mp3s, midi files and text files can be directly accessed.
An interesting feature is that if you set up a registration using, say, a user style and and/or a text file from the USB drive, the keyboard stores both the style and the text in the registration, so that it will be recalled even though the drive has been removed. Haven't tried that with a midi file.
DonM