MCF x2 -030 - Synthesizer ALM - Free user manual and instructions

Product Type	Synthesizer
Brand	ALM
Model	MCF x2 -030
Category	Eurorack Module
Power Supply	+12V / -12V (Eurorack standard)
Current Draw	+12V: 80mA, -12V: 30mA
Dimensions	8 HP (40mm) wide, 3U (128.5mm) height, 35mm depth
Weight	120g
Filter Type	Dual analog multi-mode filter (low-pass, high-pass, band-pass)
Number of Channels	2 independent filter channels
Controls	Cutoff, Resonance, Mode switch, CV attenuators per channel
Inputs	2x audio inputs, 4x CV inputs (Cutoff, Resonance per channel)
Outputs	2x audio outputs (individual), 1x mix output
CV Range	0-10V (typical Eurorack)
Frequency Response	20Hz - 20kHz
Maintenance	Wipe with a soft, dry cloth. Do not use liquids or solvents.
Safety	Keep away from water and excessive heat. Disconnect power before handling.
Spare Parts	Contact ALM or authorized dealers for replacement modules.
Repairability	Repairs should be performed by qualified technicians. Do not open the unit.
General Information	Designed and assembled in the UK.

Frequently Asked Questions - MCF x2 -030 ALM

What does MCF x2 -030 stand for?

MCF likely stands for Multi-Core Filter, x2 indicates dual channels, and -030 is the specific variant.

Is the MCF x2 -030 a stereo filter?

It has two independent filter channels that can be used for stereo patching, but each channel is mono. A stereo signal can be processed across both channels.

What is the power requirement for this module?

It requires +12V at 80mA and -12V at 30mA via standard Eurorack ribbon cable.

Can I use it with a 5V power supply?

No, it requires bipolar ±12V from a Eurorack case. Do not attempt to power with a single 5V supply.

How do I calibrate the filter?

Calibration is done via internal trimmers on the PCB. Adjust for 1V/octave tracking using a precise voltage source and a multimeter. Refer to the full manual for detailed procedure.

What is the filter slope?

The filter offers 12dB/octave slope per channel, switchable between low-pass, high-pass, and band-pass modes.

How do I clean the module?

Use a soft, dry cloth to gently wipe the front panel. Avoid liquids, as they may damage the electronics.

Can I chain two modules together?

Yes, you can cascade multiple filter modules by patching the output of one into the input of another for more complex filtering.

What is the CV range for cutoff and resonance?

CV inputs accept 0-10V, with 5V typically providing full range. Use attenuators to scale external CV signals.

Where can I find the full user manual?

The manual is available for free download on notice-facile.com and the ALM website.

USER MANUAL MCF x2 -030 ALM

Abstract black circular logo with white geometric shapes (no text or symbols)

ALM∅3∅ / MCFx2

TECHNICAL SPECIFICATIONS

Power: +12V 85ms / -12V 85ms Size: 14HP Depth: 32mm

Module Installation

With your modular synth powered off, connect the 10 pin end of the supplied standard eurcrack power connector cable to the 10 pin power connector on the rear of the module.

The red stripe on the cable should be orientated to match the text 'RED' marked on the rear of the module near the power connector (this is -12V). Connect the other 16 pin end of the cable to your eurorack bus board (Refer to your bus board documentation for the correct orientation).

You are now safe to power up your modular synth. If the module fails to power up, check that you have the power cable correctly orientated and have carefully read the manual.

MCF x2

http://busycircuits.com/alm030

The MCFx2 is our state variable 'MCF' filter made double. It features 2 identical classic analog 3 pole state variable filter cores each with Low High and Band Pass (or Notch) outputs. Direct and voltage control is provided for both filter cut-offs and resonance. Switches allow the filters to function as one, with the 'Food' switch internally routing audio from one filter to the other in series and the 'Link' switch linking the cut-off controls for both filter cores. MCFx2 expands on the great sounding MCF filter to offer both serial and parallel functionality for stereo operation, dual peak, tighter slopes and other complex filtering set ups.

FREQUENCY CONTROLS

Sets the base frequency for the filter cut clfa. The v/oot and frequency inputs are added to these.

V/OCT INPUTS

Additional cut-off frequency control inputs. Cut-off frequency approx doubles for every input volt. Allows for key tracking and use as sine oscillator when filter self-oscillates.

RESONANCE CONTROL

Sets the level of resonant peaks atop the cut oil frequencies. The resonance can get particularly aggressive going into self-oscillation with the control past "2 o'clock.

OUTPUTS

Each filter output is 3 pole with an 18dB/oct slope.

Low - low pass filter outputs. Passes frequencies below the cut off.

High - high pass filter outputs. Pass- us frequencies above the cut-off.

BP/Watch - band pass or notch filter outputs. Jumpers on the rear of the module select, one or the other for each filter.

Passes frequencies within (BP) or outside (Notch) a narrow region around cut off frequency.

LINK BUTTON

Links the left cut off to parallel control both filters. The right controls will now set the max range of the right core. Both filters will track together when the right cut off is fully clockwise.

FEED BUTTON

Routes the output of the left filter core to the input of the right (unless pulched), with the desired output filter type selected via jumper at the rear of the module.

FREQ INPUTS AND ATTENUATORS

Control voltage inputs here are combined with knock offsets to set the final cut off. Attenuversion control allows for both attenuation and inversion of the CV. Expects approx. 5V 5V input.

RES INPUTS AND ATTENUATORS

Attenuated control voltage inputs here are combined with knc offsets to set the final resonance. Exports approx. -5V - 5V input

AUDIO INPUT 'In'

Signal inputs to the filter cores for processing

Input sources may need to be attenuated, filter will drive from hotter input levels.

The left input is normalised to the right (unless 'Feed' is enabled).

V/OCT Tracking Calibration

Ca libration is performed by carefully adjusting the trimmers on the back of the module. Apply 1V to V/Oct in put, and tune the self oscillating filter via front panel controls to C1. Next, change the input voltage to 3V and then adjust limmer on reverse until you get C3. You may need to go back and forth and repeat the process a couple of times for best results.

You should expect good tracking over at least 2 octaves. Note the module ships pre-calibrated.

Support

Need help? Email your questions to [e-mail]

For the latest news, additional info, downloads and firmware updates please visit the ALM website at http://busycircuits.com and follow@busycircuits on Twitter and Instagram.

Limited Warranty

From the date of manufacture this device is guaranteed for a period of 2 years against any manufacturing or material defects. Any such defects will be repaired or replaced at the discretion of ALM. This does not apply to:

• Physical damage arising from mis treating (i.e. dropping, submerging, 'modding', etc).

+Damage caused by incorrect power connections.

• Overexposure to heat or direct sunlight.

• Damage caused by inappropriate or misuse.

• Use of incorrect or non official firmware

No responsibility is implied or accepted for harm to person or apparatus caused through operation of this product. By using this product you agree to these terms.

ALM030 manual version: 0.1