Module A-145 is a low frequency oscillator, which produces cyclical control voltages in a very wide range of frequencies. 

Five waveforms are available: sawtooth, inverted sawtooth, triangle, sine and square wave. The LFO can be used as a modulation source for any number of modules - for instance modulating the pulse width or frequency of a VCO, modulation of the cut-off frequency of a VCF, or amplitude modulation with a VCA.

A three-way switch lets you select three frequency ranges, spanning from one cycle every several minutes at the lowest, to moderate audio frequency at the highest (about 4-5 kHz).

The LFO signal can also be synchronised, via the reset input.

Merk:

Doepfer

Type:

LFO

Nummer:

A-145-1

Diepte:

55mm

Breedte:

8HP

Power:

30mA @ +12V, 20mA @ -12V

Module A-145-4 is a simple quad LFO (Low Frequency Oscillator). Not a very "exciting" module, just a bread-and-butter device and a simple demon for work. Virtually in every modular system several LFOs are required for modulation purposes. The module contains four simple LFOs with the waveforms triangle and rectangle. A dual color LED (red = positive / yellow = negative output voltage) indicates the triangle output of each LFO. The frequency range can be chosen for each LFO individually by means of a jumper between about 50 Hz ... 0,04 Hz (about 20 seconds, jumper removed) and about 2Hz ... 0,002 (about 8 minutes, jumper installed).

The module can be treated as a slimmed version of the quad LFO A-143-3 as it has similar features available. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is less than one third of the A-143-3. The module is primarily planned for applications where only limited space is available. The functional difference compared to the A-143-3 are the missing sawtooth outputs and frequency range switches.

If more advanced features are required (e.g. additional waveforms, complex waveforms, waveform reset, adjustable waveforms, voltage controlled frequency and level) the modules A-143-1, A-143-3, A-143-4, A-145-1, A-146 and A-147-2 are available.

Merk:

Doepfer

Type:

LFO

Nummer:

A-145-4

Diepte:

30mm

Breedte:

4HP

Power:

30mA @ +12V, 30mA @ -12V

Module A-146 (LFO 2) is a Low Frequency Oscillator, which produces periodic control voltages over a wide range of frequencies.

The LFO can be used as a modulation source for a series of modules (for instance pulse width and/or frequency modulation of a VCO, modulation of a VCF cut-off frequency, amplitude modulation with a VCA).

Three outputs are available, with different waveforms: sawtooth / triangle; square wave, and positive-voltage square wave. The waveform is continuously adjustable from rising sawtooth, through triangle to falling sawtooth. The same control affects the pulse width of the square wave.

A three-way switch can select one of three frequency ranges, spanning from one cycle every few minutes, at the lowest, up to audio frequency at the highest.

The fourMulator is a quad digital, voltage controllable LFO with Tap-Tempo and LFO synchronisation to an external clock. Synchronisation to an adjacent LFO is possible as well and gives you the possibility to shift the LFO’s phase.

The fourMulator contains four (digital) LFOs with following waveforms: rising and falling sawtooth, square, triangle, sine and random (S&H) and it works beyond this as a clock generator with tap-tempo function.

Each LFO can be free-running, synchronized to the master clock or synchronized to the preceding LFO. When synched to the clock the LFO can oscillate in a fraction or multiplicator of the clock. When synched to the preceding LFO you can shift it´s phase (and the start of the wave form) continuously up to 180°. Each LFO (called "modulator" in fourmulator language) has a reset input and CV input that always affects the function of the Speed/Phase control, either frequency, clock divisor, clock multiplier or phase. Each modulator has a wave form output and a trigger output that fires a trigger at each start of a waveform. Furthermore you´ll find a master reset input affecting all modulators that don´t use the individual reset input. The Trigger Sequence output carries the sum of all synchronised trigger impulses. By shifting the modulators´ phases you can generate rhythmical structures.

Merk:

Vermona

Type:

LFO

Naam:

FourMulator

Diepte:

25mm

Breedte:

34HP

Power:

120mA @ +12V, 10mA @ -12V

Erica Synths Pico RND is a combined LFO/random source module.

Features

• Sine and pulse LFO with manually controlled frequency
• White noise generator
• LFO rate synchronization to the external clock
• Internally and externally clocked S&H CV output
• Random trigger output

It generates sine LFO waves, white noise, S&H CV and some more interesting stuff – random triggers and pulse wave with random duty circle, basically everything you need to bring some uncertainty in your modular setup.

Pico Series: is to possible to make ANY superior functionality synth module 3HP wide and affordable? Yes.

Merk:

Erica Synths

Type:

LFO

Naam:

Pico RND

Diepte:

35mm

Breedte:

3HP

Power:

28mA @ +12V, 15mA @ -12V

Erica Synths Black Modulator is a fully analogue modulation and noise source.

Features

• LFO with sine, triangle and pulse outputs
• LFO/Audio range switch
• Zener diode-based noise generator for massive, full spectrum white noise
• Pink noise filter
• Noise crush knob and crushed noise output – fade from 1 bit noise to individual random trigger bursts
• Clockable sample and hold circuit.
• S&H circuit based on rare, high quality S&H chip
• S&H CV and clock inputs

This module has LFO/audio frequency oscillator with three simultaneous waveform outputs, Zener diode-based noise generator with three noise flavours and clockable S&H circuit.

Erica Black series are high-end modules with unique functionality. Only the highest quality components are used and all inputs and outputs are protected against undesired overvoltage. When designing the Black Series, we did not economise on the module width, we put design and usability first. Big knobs are assigned to functions that make difference in sound. Together the Erica Black series are a range of modules that make an entire synthesizer.

Merk:

Erica Synths

Type:

Frequency modulation, LFO, Noise, Sample & Hold

Naam:

A-160-1

Diepte:

40mm

Breedte:

4HP

Power:

40mA @ +12V, 0mA @ -12V