The Low Frequency Oscillator (LFO) adds varying rates and depths of modulation to a given waveform in a Patch. It is often desirable to use the LFO to accentuate the character of a Patch. The LFO is commonly used to control pitch, volume, or panning. The JV-2080 lets you sync the tempo of the LFO to its internal clock, so the changes in sound caused by the LFO sound in time with the internal clock tempo of the JV-2080. Use the following procedure to edit a Patch so its LFO syncs to an external clock:

For a Patch:

1. Press PATCH.
2. Press F5[LFO&CTL] to display the LFO parameter pages (see Fig. 5).
3. Press F1[LFO 1] or F2[LFO 2] to select one of two LFOs.
4. Use TONE SELECT [1]-[4] to select the Tone to which the settings will apply.
5. Use the CURSOR buttons to select "Ext Sync."
6. Use the VALUE dial to select "CLK."
7. Use the CURSOR buttons to select "Rate."
8. Use the VALUE dial to specify the rate/speed of the LFO cycle (e.g.,h, q, e).
9. Press F1 for COMMON.
10. Press F1 for GENERAL.
11. Use the CURSOR buttons to select "Clock Source."
12. Use the VALUE dial to set the Clock Source to "SYSTEM."
 

Now let's write this edited Patch into a User location to be used in a Performance:

1. Press UTILITY.
2. Press F1[WRITE] to call up the Write screen.
3. Use the VALUE dial to select a User location.
4. Press F6[EXECUTE] to write.
5. Press PERFORMANCE.
6. Press F3[PART] to display the Part Param page.
7. Press F6[PALETTE] to display the Part Palette page.
8. Use the LEFT/RIGHT CURSOR buttons to select a Part.
9. Use the UP/DOWN CURSOR buttons to select "Patch Group."
10. Use the VALUE dial to select "USR."
11. Press the CURSOR DOWN button once to select "Patch Number."
12. Use the VALUE dial to select the Patch that was edited and written to the User bank in steps 3 and 4.
In addition to syncing its LFOs to an internal clock, the JV-2080 can also set its LFOs to sync to external MIDI clock messages. For example, the LFO can be synced to a MIDI sequencer so that the rate of modulation is in time with the tempo of the song. Use the following procedure to sync the LFOs in the JV-2080 to external MIDI clock:

1. Select a Patch that uses external LFO sync (as described previously).
2. Press PERFORM.
3. Press F1[Common].
4. Use the CURSOR buttons to select "Clock Source."
5. Use the VALUE dial to set the Clock Source to "SYSTEM."
6. Press SYSTEM.
7. Press F1[SETUP].
8. Use the CURSOR buttons to select "Clock Source."
9. Use the VALUE dial to set the Clock Source to "MIDI."

Note: The tempo from the external device will be displayed under "External Tempo" on the Performance Common screen.

Tip: You can enter Patch Edit mode from within Performance Mode by holding PERFORM and pressing PATCH. Any edits done here will, however, be temporary until that Patch is saved to a User location.