The Ketron X1 and SD1 sound great playing back MIDI/SMF files. Both keyboards come with built-in hard drive, so loading of MIDI file takes a fraction of a second. There is no waiting...

The SD1 has a new 'Demo & Hits' feature where you can copy all your most used MIDI files into a special folder named 'DEMO&HIT'. When you press the DEMO&HIT button on the keyboard, all these files are listed on the screen (10 per page) and you just need to press a select key to start playing the selected song. It's very easy for playing back MIDI files.

Henry