On my VoiceLive 2, some presets will not produce a sound. Who can I fix this?
More than likely the presets that are not producing sound are presets that have been setup for midi notes mode. If you are looking at the factory preset, most of these are located from preset #184 and higher. This can be confirmed by selecting 'edit->harmony->natural play',this field should say MIDI NOTES.
In order to use these preset, you need to connect a midi keyboard to your voicelive 2 and play some notes. These preset will mimic the notes that are being played.