XV-88

Q.Sometimes the playback slows down (like a hiccup) and it gets out of tempo or suddenly cuts off. Why does this happen?

A.Sometimes the playback can slow down if the sequencer or the sound module gets overloaded. Here are some countermeasures on how you get rid of the problem.

Check the sequencer's song file to see if the number of simultaneous notes being played, exceeds the maximum polyphony (a number of the voices which can sound at the same time) of the unit. If that's the case, then reduce the number of simultaneous notes.

A Patch can contain up to 8 Tones. To play the Patch at a note shares 8 voices at a time. Others, a note keeps sounding in "Note ON" even when the sound virtually disappears at the end of the release time. With such reasons above, there occurs a mismatch in the polyphony between the sound source of the XV series and the final sound you are hearing.

You can see the current amount of polyphony on the XV-3080/ XV-88/ XV-5080/ XV-5050 in the Part Information screen.

Check the sequencer's song file to see if the Patch uses too much LFO effect. If that's the case, modify the Patch.

To process the LFO effect usually requires a rather heavy load, and sometimes it will affect the sound generation.

Check the sequencer's song file to see if too many MIDI messages are concentrated on the first beat of the song. Move them within 1-to 2-tick intervals so all the data does NOT land on the same tick.

When you program a song file in step recording, or you quantize a song after recording it in real time playing with a keyboard, it is likely that so many MIDI data is concentrated on the first beat of the song data. It results in causing a delay in sound.

Check the sequencer's song file to see if a Program Change is located in the same place where the tempo is slowing down. Move it to a different tick nearby.

Patch changing during playback sometimes requires so much load, that it may affect the playback.

Check the sequencer's song file to see if any System Exclusive messages are located in the same place where the tempo is slowing down. Make sure that system exclusive messages and MIDI notes DO NOT occupy the same space.

System Exclusive messages usually are large in size, therefore they should play all by themselves. Move the sys ex. messages to another area in the song where they don't conflict with the MIDI notes.

Check the sequencer's song file to see if there's a lot of Aftertouch and/or Control Change data where the tempo is slowing down. If so, move that data to other places nearby, or reduce the over all amount of data.

If you record song data using a MIDI keyboard that transmits Aftertouch in real time, a large amount of Aftertouch data will be recorded. This data will apply an excessive load to sequencers and sound modules.

(2003/08/22)

To the top of page