The attached manual is for the 2hp MMF, a voltage-controlled analog multimode filter. On its own, this is not a sound source or pitch generator, but in a Eurorack system it is extremely useful for shaping harmonics into melodic voices, animated sequences, and resonant tuned lines.
The MMF provides:
Key specs from the manual:
-8V to +8V-5V to +5VA multimode filter like this is one of the main tools for turning simple raw oscillator signals into something that feels melodic and expressive.
You can use it to:
This is the most straightforward use.
This gives you a standard synth voice: - oscillator determines the pitch - MMF shapes brightness - modulation of cutoff adds articulation and contour
Even if the pitch sequence is simple, filter motion makes each note feel distinct. Short envelopes into cutoff create plucks; longer envelopes create expressive lead lines.
The manual specifically suggests it can do “squelchy acid lines.”
You get: - per-note cutoff sweeps - emphasized harmonics - pronounced resonant character
For acid-style phrasing: - use slides from your sequencer if available - accent certain notes by increasing cutoff CV amount - keep resonance high, but back off if the fundamental disappears too much
The BP output is especially useful for melodic work.
The band-pass output isolates a narrower spectral region. Sweeping cutoff across harmonics can create the impression of changing pitches or formants, especially when the source is rich.
This is a great trick if you want melodic motion from timbre rather than only from pitch CV.
Because the module outputs LP, HP, and BP simultaneously, you can create multiple related parts from one source.
You can treat the three outputs as separate voices:
All three layers track the same filter movement, so they feel connected, but each occupies a different spectral role. This is excellent for creating a more complex melodic texture from minimal patching.
The manual doesn’t explicitly say the MMF self-oscillates, so this cannot be guaranteed from the documentation alone. However, many analog filters with resonance can approach sine-like ringing at high resonance.
At high resonance, cutoff becomes very prominent and can behave in a quasi-pitched way. Even if it does not fully self-oscillate, it can still produce tuned resonant tones when excited by incoming audio.
If your system includes trigger envelopes, you can ping the filter with very short transients from another module and tune the cutoff for melodic percussion.
The Freq CV range is wide: -8V to +8V added to knob position. That means the filter cutoff can be animated dramatically.
Mult the same pitch sequence: - one copy to oscillator 1V/oct - another copy, attenuated, to Freq CV
As notes go up, the filter opens too. This creates a natural brightening with pitch, similar to acoustic instruments and many classic synth patches.
A melodic line often sounds more alive when timbre loosely follows pitch. The MMF can do that very effectively with the right attenuation.
High-pass filters are often overlooked in melodic patching.
The HP output strips low fundamentals and emphasizes upper harmonics. This can create: - thin, cutting leads - airy arpeggios - supporting countermelodies that sit above a bass part
If your patch is muddy, use HP for the melodic layer while another voice handles the low end.
The MMF is only one filter, but the BP output with resonance can create vocal-like emphasis.
Instead of hearing only note changes, you hear timbral “mouth shapes” moving with the melody.
A melody does not always need to be purely pitch-based. You can make a repeated note feel melodic by sequencing the filter.
Each step emphasizes different harmonics, creating the sensation of contour and phrase. This is especially effective with rich waveforms.
Our ears often interpret changing spectral emphasis as a musical line, especially when resonance adds a distinct peak.
Since the MMF is a filter, it works best in a melodic patch when paired with:
If you have only one oscillator, the MMF still greatly expands your melodic possibilities by creating multiple timbral variants of the same line.
Use this for solid mono bass with dynamic note articulation.
Good for focused melodic leads that cut through a mix.
Useful for sparkly top-end melodic texture above a bass voice.
Creates a complex, mix-ready layered voice from one oscillator.
-8V to +8V-5V to +5VIn practice, attenuating modulation into these inputs will help you keep melodic patches controllable and musical.
The 2hp MMF is best thought of as a melodic tone-shaping module rather than a melody generator. It shines when used with an oscillator and sequencer to produce:
If you pair it with even a basic VCO + envelope + VCA + sequencer, it can become a central part of highly expressive melodic patching.