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Radikal Technologies SPECTRALIS Hybrid GrooveBox

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The Spectralis is a performance-oriented music instrument with multiple sequencer-sections optimized for LIVE-operation. In addition it is also an extravagant and powerful sound-design tool. The Spectralis also doubles as a workstation and can handle complete music production jobs - due to its sampling engine which comes with digital multimode-filters.

The Oscillator section of the Spectralis provides the following features:

Four Oscillators seamlessly morph from Sinewave via Triangle, Sawtooth all the way to Square Wave. To provide maximum flexibility with the source material, the basic wave forms can be altered extremely with the help of our proprietary Time Linearity Modulation.

The first of the four Oscillators can be synchronized to the second Oscillator.
To sculpt the basic sound further you can use ring- modulation, frequency-modulation and phase modulation. In addition each individual Oscillator has adjustable bit- reduction, allowing you to add the character of old-style digital synths according to preference. Naturally the DSP Oscillators of the Spectralis are free running. This way you can obtain the “living” sound, which even today still accounts for the ongoing popularity of old analog instruments.

Still, you also have the option to start the Oscillators on a fixed phase with individual phase offsets for each oscillator.

Combining the fix phase-startingpoint with the absolute exact tuning and tracking of the oscillators will create countless new basic basic waveforms via phase-cancellation. Each oscillator has individual Envelopes for Amplitude and Pitch Control. The oscillators are not only available as sound sources for the different filter-sections - they can be used as modulation sources for Filter-FM as well.

Even the Glide-Time for each of the four Oscillators can be adjusted individually. In addition each of the Oscillators can be ”patched” into the various signal routes. As a result of this flexibility, it is no problem to construct multiple independent signal routes to create multiple individual synth lines using the subtractive Synth. The quality of the Spectralis’ Oscillators impresses with its sparkling sound, which can be played throughout the whole audible range without any aliasing artifacts.

This quality was accomplished with the help of band spectrum optimized waveform synthesis. This technology also allows you – among other things – to detune the Oscillators used in the creation of a specific sound far apart from each other.

You can expand the sound of a thick phasing pad with an oscillator that has been tuned four octaves up and set with a slight glide. This adds a very special timbre/feel to the original sound, which is felt via the additional oscillator more as an expansion of the sound spectrum rather than heard as an additional note. The tuning range of the oscillators is 0,1 Hz to 20 kHz.

The analog Filter Section of the Spectralis provides the following:

Filter 1 – 24dB Lowpass

The 24dB analog filter impresses with it’s very warm character. Resonance can be opened all the way to self-oscillation and thus becomes an additional sound source. The core filter circuit is a discreet design and is followed by high-end op-amps which channel the sound of the Filter into the signal path without any discernible noise level.
The Spectralis offers total flexibility regarding the routing of the Filter. For instance you can route the signal via a VCA to the analog output or feed it to the inputs of the multi-mode Filters or the filterbank with adjustable level.

Filter 2 – 12dB Multimode Filter

The 12dB Multi-Mode Filter provides High-Pass, Band-Pass and Low-Pass characteristics. The combination of High-Pass and Low-Pass creates a Notch Filter, which allows more subtle, phase-type sound changes.

Of course the output of the Multimode filter can be routed freely within the sound engine. The filter frequency of both filters can be linear modulated with the outputs of the Oscillators. Additionally the Filters come with independent LFOs and Envelope generators.

The Filterbank of the Spectralis

The Fixed Filter Bank has 8 band passes, plus a High-Pass and Low-Pass Filter. As the level of the individual filter frequencies can be controlled dynamically, you can generate completely unusual sounds.

Many real instruments, due to the construction of their resonance body – don’t have a consistent volume level or sound color across their whole playable range. The body usually emphasizes one or more frequency ranges of the generated overtone structure and suppresses others. This is what gives instruments their particular sound, which changes depending in what range the instrument is being played. The emphasized sections of the spectrum are being called formants. Using the Filterbank you can create such formants.

A very special ”natural” instrument is the human voice, as it’s ”body” can be adjusted in size and shape. With the help of this capability, it is possible to form the various vowels (a,e,i,o,u) with your throat using the resonance of the vocal chords. Due due its dynamic control the Filterbank of the Spectralis has the ability to vary the emphasis of the different frequency ranges. In principle the signal routed through the filterbank becomes the ”vocal chord” and the filterbank itself is the resonance ”body”.

In this graph you can see the basic set-up of the Filterbank with the according gain-stages. The Input Signal is being sliced into individual filterportions. If all gain-stages are set to a 0 Volume no sound reaches the output. If an individual amp is being opened, only the frequencyband, which passes the according filter reaches the output. If the filterbank is being used parallel to the original signal flow, you can add formants to the original sound.

Technical Specifications
Type: Analog, Digital
Synthesis: Frequency Modulation, Phase Distorion, Sampling, Subtractive
Oscillators: 4
Waveforms: Pulse Variable, Saw Down, Sine, Triangle
ROM Size: 4 GB
Osc Modulation: After Touch, Breath Controller, Continuous Controller, Envelope, Input, Keyboard, Knob, LFO, Pitch Wheel, Glide / Portamento, Ring Modulation, Sequencer, Sync Hard, Velocity
Sampling: 16 bit, 44.1 kHz
Sampling Notes:
128 MB RAM
Envelopes: 2
Evelope Paramerters: Attack, Decay, Sustain, Release, Freerun, Triggered
Filters: 3
Types: 12dB Slope (2-pole), 24dB Slope (4-pole), Band Pass, High Pass, Low Pass, Resonance
Filter Modulation: After Touch, Breath Controller, Envelope, Keyboard, Knob, LFO, Mod Wheel, Portamento, Sequencer, Velocity
Filter Notes:
Fixed Filter Bank has 8 bandpasses, plus a High-Pass and Low-Pass Filters.
LFO: 10
LFO Parameters: Envelope, Sample & Hold, Saw Down, Sine, Square, Triangle, Clocked, Delay
Polyphony & Tuning
Polyphony: 32
Timbrality: 17
Tuning: Standard
Modes: Polyphonic
Patches RAM: 1
Storage: Internal, SD Card, USB
Editing: MIDI, USB
6 arpeggiators
15 pattern modes
DSP based effects
Digital Delay
Tempo clocked
Drum Grid Programmer<br />11 parts
17 Track sequencer
24 Step sequencer
Chips and Operating System
Firmware 1.71
Case: Desktop
Case Details: 16 Keys
Keyboard: Buttons, Non-weighted, Plastic
Controls: Buttons, Knobs, Sequencer, Switches, Tempo Knob
Display Type: LCD, LED, Backlit
Display Count H: 48
Display Count V: 2
Audio Output Connections: 1/4" Phone Jack, Mono Out, Stereo Headphone
Audio Output Count: 8
Audio Output Notes: 1 - 4 1/4" Direct Outs
Inputs: 1 - 2 1/4" External Inputs
DAC Bits: 16
DAC Frequency Rate: 44.1
Power: 120 / 220 V AC IEC Connector
Year Released: 2004
Manuals & Documents
MSRP List Price: $2,500 - convert

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