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A low frequency oscillator (LFO) produces cyclical waveforms at low enough frequencies to be useful as control voltages. The only way an LFO differs from other classes of [[Oscillator|VCO]] is the frequency ranges available - i.e. not all cyclic oscillations lie within the audio frequency range (though this doesn't mean you can't hear them necessarily - a [[clock|Clock]] oscillator can sound like a series of regular clicks).
A '''low frequency oscillator''' (LFO) produces cyclical waveforms at low enough frequencies to be useful as control voltages. The only way an LFO differs from other classes of [[Oscillator|VCO]] is the frequency ranges available - i.e. not all cyclic oscillations lie within the audio frequency range (though this doesn't mean you can't hear them necessarily - a [[Clock]] oscillator can sound like a series of regular clicks).


Usually some or all of the following are available - [[Waveforms|sine]], [[Waveforms|triangle]], [[Waveforms|square]], [[Waveforms|sawtooth]] waves and [[Waveforms|random/pseudo-random]]. An LFO can be used as a modulation source for pretty much any module with a cv input - for instance modulating the frequency of a VCO (vibrato) or amplitude modulation with a VCA (tremolo). It is worth noting many can act as audio frequency oscillators and may have [[Reset|reset]], [[Sync|sync]] and other functions more commonly found on other VCOs.
Usually some or all of the following are available - [[Waveforms|sine]], [[Waveforms|triangle]], [[Waveforms|square]], [[Waveforms|sawtooth]] waves and [[Waveforms|random/pseudo-random]]. An LFO can be used as a modulation source for pretty much any module with a cv input - for instance modulating the frequency of a VCO (vibrato) or amplitude modulation with a VCA (tremolo). It is worth noting many can act as audio frequency oscillators and may have [[reset]], [[sync]] and other functions more commonly found on other VCOs.


== References ==
{{From Mod Wiggler Wiki|Low frequency oscillator}}


[[Category:Synthesizer components]]
Feel free to add to this list. See also: [[Modules_by_function | Modules by Function]]

==[[Euro]]==

{| class="wikitable sortable" border="1" cellpadding="8"
<span class="noscript"><small><br />[[JavaScript]] must be activ
to be able to sort according to other columns.</small></span>
! Manufacturer!! class="unsortable" | Module !!Width hp!!Depth mm!!Depth in!!Power mA!! class="unsortable" | Comment !! class="unsortable" | Product Page
|-
|[[Analogue Solutions]]
||[[LFo-NZ]]
|style="width:4em"|6
|style="width:4em"|
|style="width:4em"|
|style="width:4em"|
|| VC LFO with noise
||[http://www.users.globalnet.co.uk/~concuss/concussor/lfo-nz.htm LFO-NZ]
|-
|[[Analogue Systems]]
||[[RS80]]
||12
||
||
||25
||VC LFO
||[http://www.analoguesystems.co.uk/modules/rs80.htm RS-80]
|-
|[[Analogue Systems]]
||[[RS85]]
||12
||
||
||
||Extended VC LFO
||[http://www.analoguesystems.co.uk/modules/rs85.htm RS-85]
|-
|[[Bubblesound]]
||[[uLFO]]
||14
||60
||2,5
||100
||VC LFO, shaped sine
||[http://www.bubblesound-instruments.com/ uLFO]
|-
|[[Cwejman]]
||[[D-LFO]]
||12
||21
||0.83
||45
||Multi Function Dual LFO
||[http://www.cwejman.net/d-lfo.htm D-LFO]
|-
|[[Cwejman]]
||[[PH-4]]
||10
||21
||0.83
||40
||4 Phase Modulator
||[http://www.cwejman.net/ph-4.htm PH-4]
|-
|[[Doepfer]]
||[[A143-1]]
||28
||
||
||70
||Quad AD/LFO
||[http://www.doepfer.de/a1431.htm A-143-1]
|-
|[[Doepfer]]
||[[A143-3]]
||14
||
||
||70
||Quad LFO
||[http://www.doepfer.de/a1433.htm A-143-3]
|-
|[[Doepfer]]
||[[A143-9]]
||8
||
||
||40
||VC Quadrature LFO
||[http://www.doepfer.de/a1439.htm A-143-9]
|-
|[[Doepfer]]
||[[A145]]
||8
||
||
||30
||Standard LFO
||[http://www.doepfer.de/a145.htm A-145]
|-
|[[Doepfer]]
||[[A146]]
||8
||
||
||20
||variable waveform LFO
||[http://www.doepfer.de/a146.htm A-146]
|-
|[[Doepfer]]
||[[A147]]
||8
||
||
||40
||VC LFO
||[http://www.doepfer.de/a147.htm A-147]
|-
|[[Intellijel]]
||[[Mind Meld]]
||8
||
||
||< 2
||Livewire Vulcan Expander
||[http://www.intellijel.com/synthmodules Mind Meld]
|-
|[[Livewire]]
||[[Vulcan Modulator]]
||14
||50
||1,97
||80
||Dual VC LFO + sum,diff,min,max
||[http://www.livewire-synthesizers.com/index.php?op=modulators&module=vulcan Vulcan]
|-
|[[MFB]]
||[[Dual LFO]]
||8
||
||
||30
||DUAL VC LFO
||[http://www.mfberlin.de/Produkte/Module/DUAL_LFO/dual_lfo.html Dual LFO]
|}



==[[5u|5U]]==


{| border="1" cellpadding="8"
!Manufacturer !! Module !! Width !! Power !! Comment !! Product Page
|-
|[[Corsynth]]
||[[C102 VC LFO]]
||1MU
||+-15VDC 30ma max
||Voltage Controlled LFO
||[http://corsynth.com/home/modules/c102-vc-lfo C102]
|-
|[[Grove Audio]]
||[[GMS-782]]
||4.250" (2MU)
||+-15VDC at 50ma max
||Dual VC LFO/VCA
||[http://www.groveaudio.com/eminstruments/gmp782.aspx GMS-782]
|-
|[[MOTM Synthesis Technology]]
||[[MOTM-320]]
||3.470" (2U)
||+-15VDC at 45ma max
||Voltage-Controlled LFO
||[http://www.synthtech.com/motm320.html MOTM-320]
|-
|[[MOTM Synthesis Technology]]
||[[MOTM-380]]
||1.735" (1U)
||+-15VDC at 10ma max.
||Quad LFO (Low-Frequency Oscillator)
||[http://www.synthtech.com/motm380.html MOTM-380]
|-
|[[Oakley Sound Systems]]
||[[VC LFO]]
||1U
||
||Voltage Controlled Low Frequency Oscillator
||[http://www.oakleysound.com/vclfo.htm VC LFO]
|-
|[[Oakley Sound Systems]]
||[[Little LFO]]
||1U
||
||Little LFO
||[http://www.oakleysound.com/lfo.htm Little LFO]
|-
|[[MegaOhm Audio]]
||Two LFO
||1U
||dotcom/MOTM
||2 different LFO, 1 with variable shape
||[http://www.megaohmaudio.com/LFO.html Two LFO]
|-
|[[Synthetic Sound Labs]]
|| SSL 1250
||1U
||dotcom
||4 LFOs, each with 2 ranges
||[http://www.steamsynth.com/m_QuadLFO.aspx Quad LFO]
|-
|
||
||
||
||
||
|}

==[[Frac]]==


{| border="1" cellpadding="8"
! Manufacturer !! Module !! Width !! Power !! Comment !! Product Page
|-
|
||
||
||
||
||
|}


{| border="1" cellpadding="2" cellspacing="1" width="40%" align="center" font-size="60%"
|+ '''Navigation'''
|- width="45%" align="center"
! style="background:#dcdcdc;" | Sub-section
| [[Modules by function|Modules by function]]
|
|- width="20%" align="center"
! style="background:#dcdcdc;" | Related
| [[LFO|LFO]]
| [[VCO]]
|}

Latest revision as of 18:09, 24 April 2021

A low frequency oscillator (LFO) produces cyclical waveforms at low enough frequencies to be useful as control voltages. The only way an LFO differs from other classes of VCO is the frequency ranges available - i.e. not all cyclic oscillations lie within the audio frequency range (though this doesn't mean you can't hear them necessarily - a Clock oscillator can sound like a series of regular clicks).

Usually some or all of the following are available - sine, triangle, square, sawtooth waves and random/pseudo-random. An LFO can be used as a modulation source for pretty much any module with a cv input - for instance modulating the frequency of a VCO (vibrato) or amplitude modulation with a VCA (tremolo). It is worth noting many can act as audio frequency oscillators and may have reset, sync and other functions more commonly found on other VCOs.

References

This page uses Creative Commons Licensed content from Mod Wiggler Wiki:Low frequency oscillator (View authors).

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