- Тype: Analog, Keyboard Synthetizer
- Sound Engine: Analog
- Number of Keys: 37
- Polyphony: 4
Sequential Fourm Synthesizer
Fourm delivers four genuine voices of Sequential analog sound, built on the legendary Prophet-5 voice architecture—right down to its characteristic envelope response curves. With dual oscillators offering simultaneous wave selection and a classic 4-pole low-pass filter with bass compensation, Fourm captures the warmth and punch that shaped a generation—and takes it to the next level.
Fourm’s analog voice path is built around a modern oscillator chip inspired by the design used in the original Prophet-5 Rev 2. It delivers the same rich, musical tone as its vintage predecessor, now enhanced by the benefits of contemporary engineering — improved stability, reliability, and consistency. It’s the perfect foundation for Fourm’s 100% analog sound.
Fourm’s analog 4-pole lowpass filter chip is based on a classic design known for its rich, organic tone and musical resonance. The modern implementation faithfully preserves that sonic character while adding bass compensation. Now you can crank the resonance without sacrificing low-end power — keeping your sound full, bold, and unmistakably analog.
Tucked into the arpeggiator section, Fourm’s polyphonic step sequencer is a creative powerhouse. Yes, it can play back musical phrases — but it can also be used as a modulation source, perfect for triggering rhythmic filter patterns and more. With support for chords, ties, rests, Acid-style per-step glide, and deep modulation routing, the sequencer transforms Fourm into a dynamic, hands-on composition tool.
Number of Keys: 37
This instrument has 37 keys, equivalent to 3 octaves, providing a wide range of tones for a variety of musical applications.
Aftertouch: Yes
Aftertouch technology on the keys allows musicians to add a new level of expression to their playing. When a key reaches the bottom of its stroke, the pressure exerted on the key can continue to be sensed and used to control various aspects of the sound, such as vibrato, volume, or tone modulation.
Polyphony: 4
The polyphony of this instrument allows up to <%=tp_value % notes to be played simultaneously, providing rich and complex musical possibilities.
LFO: Yes
An LFO, or low frequency oscillator, brings electronic sound to life. It adds movement and interest to synthetic sounds and effects, playing an important role in both subtle synthesis and bold sound design. However, you won't hear the LFO itself because it acts as a modulator. This means that it does not directly affect the audio signal, but adjusts other parameters such as oscillator pitch and filter clipping.
Envelope: Yes
The Envelope filter gives you precise control over the dynamics and shape of the sound. This filter provides greater flexibility in adjusting and customizing sound characteristics, enhancing the overall quality and expressiveness of the performance.
Oscillators: Yes
A powerful oscillator system allows users to create rich and variable sound textures. Oscillators can generate a variety of waveforms, including sine, square, triangle, and noise, allowing for creativity and experimentation.
Pitch Bend: Yes
The Pitch Bend allows smooth pitch changes, adding expressiveness to musical expression. Often used to create effects such as glissando or vibrato, this feature allows the player to make subtle or dramatic changes to the sound in real time. Pitch bend allows musicians to create smooth transitions between notes, increasing the dynamics and expressiveness of their performances.
Modulation: Yes
Modulation allows you to change different aspects of the sound in real time, opening up a wide range of creative possibilities. For example, it can affect the pitch of the sound, creating a vibrato effect, or it can change the amplitude of the signal, creating a tremolo effect. It can also adjust filtering to create smooth transitions between frequency bands and dynamic textures. Modulation can also be used to change the character of the sound depending on the time or intensity of playing, giving the sound a lively and moving character.
Sequencer: Yes
The sequencer provides musicians with a tool for composing and arranging music, allowing them to create and edit musical sequences. This feature allows you to record and play back repeating patterns. This makes it easy to create complex rhythms and melodies. The sequencer also allows you to layer different musical elements on top of each other, sync with other devices, and adjust parameters in real time. This flexibility makes the sequencer an invaluable tool for producing music, experimenting with new sounds and creating original compositions.
Arpeggiator: Yes
The Arpeggiator transforms chords into sequences of individual notes played in various rhythmic and melodic patterns. Instead of playing the chords as a harmonic whole, the Arpeggiator breaks the chords into individual notes and plays them sequentially according to the selected algorithm.
Headphone Output: Yes
The headphone output allows direct connection of headphones for private listening. This output provides a convenient way to enjoy the sound without disturbing others or ambient noise.
Outputs
- Audio OUT (Jack 6,3 mm TS)
- MIDI OUT
Pedal Inputs: Yes
The pedal input allows you to connect an external pedal that expands the instrument's control capabilities and contributes to a richer musical expression, increasing flexibility and expressiveness when playing and creating music.
MIDI Interface: Yes
It supports MIDI, allowing you to connect and communicate with other MIDI-compatible devices. This feature extends control and integration into the larger music environment, increasing flexibility and creativity in music creation.
Package Contents
- Adapter
- Manual
Тype
Analog, Keyboard Synthetizer
Keyboard Technology
Dynamic
Aftertouch
LFO
Envelope
Yes
Oscillators
Modulation
Faders
No
Arpeggiator
MIDI Interface
Built-in Speaker
Touch Sensitive
Sound Engine
Number of Keys
Key Size
Mini
Polyphony
Pitch Bend
Yes
Storage Medium
Display
Display Type
Colour
Headphone Output
Inputs
Outputs
Pedal Inputs
USB
USB MIDI
Filter
Yes
Sequencer
Yes
UK/EU Power supply included
Width (cm)
56.2
Height (cm)
7
Depth (cm)
25.1
Net Weight (kg)
4
Made in
China
Documents
Instructions for use
Safety instructions
Please refer to the user manual for the specific safety instructions for this product.