The LFO Page
The LFO page is used to change settings for the optional
LFO (Low Frequency Oscillator) generator of the currently selected split. The LFO envelope
is a curve that is applied to the LFO output of the split. This page is also used to apply
general LFO settings to the currently selected split as well as LFO target information.

The LFO page consists of
- The LFO Envelope Display in the upper section of the page
- Knobs for setting general LFO settings for the selected
split
- Controls for setting the target and range of the LFO
The LFO Envelope
Display
An LFO envelope curve has four sections (ADSR):
- The Attack section - This is the attack time for the
sound. When you play a note, the attack time is the time that is used to reach the
specified LFO attack level.
- The Decay section - This is the decay time for the sound.
The decay section follows the attack section until the specified LFO decay level is
reached.
- The Sustain section - This is the sustain time for the
sound. The sustain section follows the decay section until the speciefied LFO sustain
level is reached. The level remains at the sustain level unless you stop the note.
- The Release section - This is the release time for the
sound. The release section follows the sustain section when the appropriate note is
stopped. The release time is the time that is used to reach the specified LFO release
level.
If you want to start the LFO with a higher level than 0,
you also can set the start level for the sound. LFO levels are directly applied to the
output of the LFO and therefore affect the LFO target.
Each section has rates from 0-63 and levels from 0-255. A
level of 255 means full LFO effect for the sound whereas a level of 0 means no LFO effect.
The rate specifies the time to reach the specified level for that section. This setting
depends on the timer resolution set in the Settings page.
By default the timer resolution is 10ms, so you can achieve rates ranging from 0ms to
630ms. If you need higher rates, you can set the EG multiplier to a value above 1. The EG
multiplier settings will multiply the rates with the given value. Valid values are 0-20,
so with an EG multiplier of 20 you would achieve rates from 0ms to 12.6s. Note that
precision decreases if you set the EG multiplier to a higher value. With an EG multiplier
of 1 for example the rate 1 results in a time of 10ms whereas with an EG multiplier of 20
it would be 200ms. Note that the envelope is only used if you activate the "EG
enabled" checkbox.
You can change rates and levels by pressing the left
mouse button over the nodes in the EG curve and drag it with the mouse to the desired
position.
General LFO Settings
Three controls are responsible to
specify general LFO settings:
- Waveform - This is the waveform that the LFO uses to manipulate the LFO target.
There are 6 waveforms available (sine, negative sine, positive sine, random, negative
random and positive random). The value "disabled" indicates that the LFO is not
active for the current split. All other settings are ignored in that case.
- Frequency - The frequency that the LFO uses with the specified waveform. A
higher frequency means faster manipulation of the LFO target. The frequency is measured in
Hz and depends on the
timer resolution set in
the Settings page. By default the timer resolution is 10ms.
- Delay - This is the delay of the LFO measured in units of the
timer resolution set in the Settings
page. LFO will start to produce output if
the specified delay has expired.
LFO Target Settings
The LFO target settings are used to specify the
target of the LFO (the sound parameter that the LFO is applied to) and the amount of LFO
that should be applied to the target parameter. The following parameters are selectable:
- None - The LFO is disabled for that split.
- Volume - The LFO is applied to the main output
volume of the split. This will modulate the sound output with the LFO waveform and
frequency.
- Pitch - The LFO is applied to the pitch of the
split. This will modulate the sound pitch with the LFO waveform and frequency allowing
tremolo effects etc. Note that you must set the "Pitch Bend wheel range" in the Controllers page to a value greater than zero in order to
make this setting take effect.
- Filter Freq - The LFO is applied to the filter
frequency of the split. This will modulate the filter frequency with the LFO waveform and
frequency.
- Filter Q - The LFO is applied to the filter
quality of the split. This will modulate the filter quality with the LFO waveform and
frequency.
- Pan - The LFO is applied to the panning of the
split. This will modulate the stereo position with the LFO waveform and frequency.
- Reverb Send - The LFO is applied to the reverb
send level for the split. This will modulate the reverb output with the LFO waveform and
frequency.
- Chorus Send - The LFO is applied to the chorus
send level for the split. This will modulate the chorus output with the LFO waveform and
frequency.
The "Range" controls specify the range
that should be applied with the LFO to the target parameter. The actual change values are
calculated from the waveform output of the LFO and the range given and are applied to the
target. For example with a LFO target "Pan" and the range between -64 and 64,
the LFO would have maximum effect on the panning of the sound allowing the sound to
oscillate between the left and the right channel when you choose the "sine"
waveform.
Changing all splits for
a Preset in one step
The checkbox "Change all splits" is used to
apply all changes to this page to all splits of the selected Preset (instrument). That
means your changes will be applied to all splits and therefore override the old values.
This is especially useful for envelope settings that typically are equal for all splits of
a Preset.