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Low Frequency Oscillators
Oberheim
Global LFO Versus Per-Voice LFO
The TEO-5 has two separate LFOs. LFO 1 is “global” and LFO 2 is “per
voice.” It’s useful to understand the difference.
Global LFO (LFO 1)
LFO 1 is a Global LFO and is a single modulator that is applied to all
voices in a program equally — with no variation from voice to voice. A
simple example of this is using LFO 1 to modulate Osc 1 Freq. Doing
so will change the pitch of all notes you play in exactly the same way
and with the same timing. In other words, if you play a chord, and strike
each note within the chord at slightly different times, the notes will shift
their pitch synchronously with each other with no variation from note to
note/voice to voice. Compare this to the example given below for LFO 2,
which is per voice.
Per-Voice LFO (LFO 2)
LFO 2 is a per-voice modulator that is applied to each voice individually,
and can vary from voice to voice. A simple example of this is using LFO
2 to modulate Osc 1 Freq. Doing so will change the pitch of all notes that
you play, but the modulation will be applied separately to each note. In
other words, if you play a chord, and strike each note within the chord at
slightly different times, each note will be modulated individually begin-
ning from the time it is struck, making the cycle of the pitch shift differ-
ent from note to note/voice to voice. It’s a subtle but noticeable difference.
LFO Parameters
Frequency: Sets the frequency of the selected LFO from a slow .022Hz
to a fast 500Hz. This is affected by the clk sync (clock sync) parameter
as explained below.
Amount: Sets the amount of LFO modulation routed to the selected
destination. Setting an amount here applies the selected modulation
continuously. You can also use the modulation matrix to route an LFO
to additional destinations and use a different modulation amount if you
want.
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