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RADICAL DELTA CEP A Owner's Manual

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DELTA CEP A
Owner's Manual

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  • Page 1 DELTA CEP A Owner’s Manual...

  • Page 2: Table Of Contents

    MIDI - Music Instrument Digital Interface ----------------------------------- 2.1.2 CV/GATE ----------------------------------------------------------------------- 2.2. Audio connection and play --------------------------------------------------- 2.3 Troubleshooting --------------------------------------------------------------- 3.0 The sections of the DELTA CEP A in detail ---------------------------------- 3.1 LFO Section ------------------------------------------------------------------- 3.2 Swarm Oscillator Section ---------------------------------------------------- 3.2.1 Scale Quantizer --------------------------------------------------------------- 3.2.2...
  • Page 3 --------------------- 7.3 [TEMPO]-button and tempo LED when running with internal clock ------ 7.4 Clock-Output jack and Clock-Divider --------------------------------------- Tuning the Delta CEP A ------------------------------------------------------- Setting up LED brightness and color ---------------------------------------- 10. Auto Power-Down function (DESKTOP version only) ---------------------- 11.
  • Page 4 DELTA CEP A Owner’s manual Version 1.1 for firmware version 1.1. Jörg Schaaf, Radikal Technologies Deutschland GmbH, Copyright © 2019 For Radikal Technologies the highest quality standards are ectremely important, and as such our products are constantly evolving. Technical changes made to improve a product may be made at any time without notice.

  • Page 5: Aeu Declaration Of Conformity

    Deutschland
 hereby declares that the following product: Product name: Music synthesizer without keyboard
 Commercial: Eurorack Semimodular Synthesizer Module
 Device name: DELTA CEP A
 Type: DELTA CEP A Eurorack & DELTA CEP A desktop
 Serialnumber: ____________
 Productnumber: RT-01
 Chargenumber: 1/2019
 
...

  • Page 6: Bcompliance

    USA. FCC INFORMATION (CANADA) DELTA CEP A Version 1.0 FCC Information (CANADA) The digital section of this apparatus does not exceed the „Class B“ limits for radio noise emissions from digital apparatus set out in the radio interference regulation of the Canadian Department of Communications.

  • Page 7: Warranty And Safety Instructions

    WARRANTY and safety instructions Warranty service Radikal Technologies provides a warranty for 12 months following purchase for electronic and mechanical components of the product, subject to the conditions described herein. If defects occur within this warranty period that have not occurred due to improper handling of the device, these will be remedied by replacement or repair of the device.
  • Page 8 (heating, amplifier power amplifiers, etc.). The Eurorack housing with the DELTA CEP A module should be installed on firm, sufficiently stable ground. The Eurorack housing may only be operated with suitable mains voltage sources or power supply units specified by the manufacturer.

  • Page 9: Introduction

    
 Installation and first use Before we go into the detailed description of the DELTA CEP A features, we first need to install the unit into a Eurorack cabinet. DELTA CEP A Desktop customers can of course skip this chapter. Before you start to install the module, you should disconnect the mains plug of the Eurorack cabinet.
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  • Page 10 Now take a look at the power supply circuit board of the Eurorack cabinet and the supplied power cable of the DELTA CEP A. The power cable has 16 wires and a color marking on the first wire (usually blue or red). On the bus board in a Eurorack cabinet, the first two contacts carry -12V.

  • Page 11: Overview

    Delta LEDs should light up and flash. If this is not the case, stop the power immediately and look for the error. But as a rule, the DELTA CEP A will now work and we can concentrate on the operation.
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  • Page 12 filter. The signal of the oscillator can be overdriven. VCF
 The filter section of the DELTA CEP A offers three different filters - a digital 12 dB multimode filter, an analog 12dB multimode filterm, and a digital 24 db lowpass filter.

  • Page 13: Connection Required - Midi Or Cv/Gate

    2.1.1 MIDI - Music Instrument Digital Interface The DELTA CEP A has a MIDI input on the front panel. If you just want to play it over a MIDI keyboard, connect the MIDI output of the keyboard to the MIDI input of the DELTA CEP A and play it on the keys of the keyboard.

  • Page 14: Audio Connection And Play

    Connect the GATE output of the keyboard to the GATE input in the ADSR section. 2.2. Audio connection and play Now you have made a MIDI or CV / GATE connection and want to play the DELTA CEP A safe first extensively. There are basically two options: Exploring the DELTA CEP A.
  • Page 15 Before you start, you need to connect the DELTA CEP A to your mixer or powered speakers (Nerds have thrown the manual into the corner by now because they connected their Delta ages ago).
 
 The DELTA CEP A Desktop version has audio outputs with 6.3 mm jack outputs on the back - so you do not need an adapter or adapter module with large and small jacks to connect the Desktop DELTA CEP A to the mixer, soundcard or active speaker system.
...

  • Page 16: Troubleshooting

    Every controller and every button counts. No matter if with or without manual. Get to know the DELTA CEP A. Play, get familiar with the device. If something does not work anymore, troubleshooting in chapter 2.3 might help.
  • Page 17 The same state is reached when you turn the device off and on again, because the DELTA CEP A basically always starts in manual mode. You have selected the 24dB lowpass filter. Since BP and HP button in the filter section do not...

  • Page 18: The Sections Of The Delta Cep A In Detail

    The LFO (LOW FREQUENCY OSCILLATOR) section of a synthesizer is the most important and widely used modulation source. An LFO generates periodic modulation voltages. The LFO of the DELTA CEP A can be tuned far into the audio range and allows both MIDI and external clock synchronization.
  • Page 19 Knobs and buttons of the LFO-Section. Knobs and buttons of the LFO-Section. Button Knob/Button Description - - - WAVE You can use the [WAVE] button to select the waveform of the LFO. - - - WAVE In 'Patch Select' mode, you can use the [WAVE] button to access the 5 memory banks.

  • Page 20: Swarm Oscillator Section

    The Oscillator section is the heart of every subtractive synthesizer. The oscillator generates waveforms in the audible frequency range. Up to eight oscillators can be heard simultaneously. The oscillator section of the DELTA CEP A provides smooth waveform selection (see Chapter 12. Glossary), TLM modulation for pulse width modulation on rectangle waveforms and sound changes on other waveforms, FM modulation, waveform morphing, and more.

  • Page 21: Scale Quantizer

    Knobs and buttons of the Oscillator section. Knobs and buttons of the Oscillator section. Button Knob/Button Description - - - DENSITY With the Density control you can set the number of oscillator clones between 1 and 8. SHIFT FM-DEPTH The [SHIFT] key lets you use the DENSITY knob to control the amount of FM modulation FM input - - - DETUNE...
  • Page 22 For this purpose, the DELTA CEP A has a musical scale quantizer. The Oscillator section only outputs pitches that correspond to a selectable scale. The scales can be selected by holding down the [PARAPHONIC] button while selecting the scale with the OSC-LEVEL knob in the Mixer section.

  • Page 23: Paraphonic Operation

    This is basically also possible with the DELTA CEP A - but all voices share one filter, one envelope and one VCA. For better differentiation, a distinctive name has been introduced for synthesizers with these properties: ‘PARAPHONIC’.

  • Page 24: Mixer Section

    Mixer section In the Mixer section you can adjust the levels of the different sound sources to be send to the filter section. Sound sources include external signals, a noise source and the output of the Swarm oscillator. Why are there three sound sources but only two controls? Noise and the external signal can only be used alternatively.
  • Page 25 Buttons and knobs of the Mixer section. Buttons and knobs of the Mixer section. Button Knob Description PARA- SCALE-SEL. With the OSC-LEVEL knob of the mixer section you can select PHONIC the desired tone scale for the quantizer while holding down the [PARAPHONIC] key.

  • Page 26: Filter Section

    RESO 1V/OCT The filter section of the DELTA CEP A has three basic filter types that can be selected on the front panel. To do this, hold down the [SHIFT] button at the bottom left and tap the button of the desired filter. The selection options are labeled with blue labels:
...
  • Page 27 Filtertypes of the DELTA CEP A. Filtertypes of the DELTA CEP A. Filtertype Description Analogue 12 dB The analogue 12 dB multimode filter, like its digital counterpart, has multimode filter
 the three filter functions lowpass, bandpass and highpass. The filter...

  • Page 28: Adsr Section

    Buttons and knobs of the Filter section. Buttons and knobs of the Filter section. Button Knob/Button Description SHIFT DIG24dB Select the digital, 24 dB lowpass filter with [SHIFT] & [DIG24dB]. - - - Use the HP button to activate or mute the highpass filter output of the active filter.
  • Page 29 The release time indicates how much time the envelope takes after the sustain phase to drop its level to zero. By default, the envelope of the DELTA CEP A controls the filter frequency and the VCA volume. If you press the [EG/GATE]-button of the VCA section, the VCA will be disconnected from the envelope.

  • Page 30: Vca Section

    VCA Section In the VCA section of the DELTA CEP A, you will find the dry audio output of the synthesizer as well as the external inputs of the stereo effects processor. Additionally this section serves as a classic voltage controlled amplifier. The Desktop version of the DELTA CEP A wires the FX Inputs additionally to regular 6.3 mm jacks at the backpanel of the desktop...

  • Page 31: Fx Section

    Input FX Section The FX section of the DELTA CEP A can be used for both - an external and an internal sound source. It provides tape delay, tempo delay, chorus, flanging and phaser effects.
 The controller assignment depends on the selected FX algorithm. Up to four effect parameters can be controlled in the algorithms.

  • Page 32: Tape Delay

    TIME MOD-RATE FEEDBACK MOD-DEPTH DRY/WET FX-SELECT 
 3.7.1 Tape Delay
 
 Knobs of the FX section after selecting the Tape Delay mode. Button Knob/Button Description SHIFT FX-SELECT Hold the [SHIFT] button and select the tape delay algorithm with the FX SELECT knob. Make sure that LED 1 on the left side lights up while dialing.

  • Page 33: Tempo Delay

    3.7.2 Tempo Delay
 
 Knobs of the FX section after selecting the Tempo Delay mode. Button Knob/Button Description SHIFT FX-SELECT While holding down the [SHIFT] button, use the FX SELECT knob to select the tempo delay algorithm. Make sure that LED 2 on the left side lights up when dialing.

  • Page 34: Phaser

    
 3.7.4 Phaser 
 
 Knobs of the FX section after selecting the Phaser mode. Button Knob/Button Description SHIFT FX-SELECT Hold the [SHIFT] button and select the phaser algorithm with the FX Select knob. Make sure that LED 4 on the left side lights up while dialing the algorithm.

  • Page 35: Fx-Section In- And Outputs

    6.3 mm jacks. Patches & Snapshots The DELTA CEP A allows for the storage of 40 sound programs (patches), each with up to 8 snapshots. Snapshots are variations of a sound program. Snapshots can be slight variations in the sound program or completely different sounds. Snapshots can be accessed in a variety of ways.

  • Page 36: Recalling Patches

    Button Knob/Button Description PATCH - - - Switch the DELTA CEP A into patch mode to save your sound creations. BIG KNOB - - - Point to the desired patch memory target for your patch with the Big Knob. As you make your selection, you can play the sound you are going to overwrite so you won’t accidentally...

  • Page 37: Snapshot Morphing

    The same is true for patches (sound programs). If you save a patch without first taking a snapshot, the DELTA CEP A automatically saves the first snapshot and loads it when you call up the patch. Even if you want to revise a patch, you should choose the Snapshot editing feature.

  • Page 38: Button Knob/Button

    INTERPOLATOR PATCH MORPH MUTE SNAP TEMPO SHIFT MANUAL Switching off the tempo clock. Button Knob/Button Description TEMPO SHIFT Hold down the [SHIFT] button and tap the [TEMPO] button. If the tempo LED flashes yellow, the MORH-LFO is stopped, it is green, it is running.

  • Page 39: Shift

    
 Switching on the tempo clock. Button Knob/Button Description TEMPO SHIFT Hold down the [SHIFT] button and tap the [TEMPO] button. If the tempo LED flashes yellow, the MORH-LFO is stopped, it is green, it is running. So you can always switch between running and stopped.

  • Page 40: Snapshot Morphing

    4.5.2 Snapshot morphing The snapshot morphing actually works just like the snapshot sequencer mode in the chapter before. The only difference is that the values do not jump, but are blended and morphed. We start again without the clock to control the morphing with the 'Big Knob'. Switching off the tempo clock.

  • Page 41: Modulation Wheel-Dependent Morphing

    Applications: Expressive performing with the modulation wheel. 4.5.4 Velocity-dependent morphing Actually, morphing is not an optimal term here. Just imagine that the DELTA CEP A calculates 128 (0-127) dynamic levels based on the snapshots (snapshots and intermediate levels) and then selects the sound variation corresponding to the dynamic level, depending on the velocity of each keystroke.

  • Page 42: Aftertouch-Dependent Morphing

    4.5.5 Aftertouch-dependent morphing If you don’t have any hands free to use any controllers, Aftertouch is a good alternative for breathing life into your keyboard performance: Selection of the fifth mode - morphing snapshots via aftertouch. Button Knob/Button Description MORPH BIG KNOB While holding down the [MORPH] button, select No.

  • Page 43: Notes On The Number Of Snapshots

    
 Muting of snapshots The DELTA CEP A Snapshot Interpolator basically does not care if it morphs from Snapshot 1 to Snapshot 8 through Snapshot 5, or from No. 1 directly to No. 8. The tonal result will be very different depending on the differences between these snapshots. For that reason, it can be very appealing to just mute a snapshot.

  • Page 44: In The Beginning There Was The Init Sound

    For this reason, the DELTA CEP A provides an INIT SOUND function to reset all parameters to default values.

  • Page 45: Deleting All Snapshots

    Only when you overwrite the original program will the changes become permanent. Patch dump functions You can exchange sounds with other DELTA CEP A users or archive your own sound banks. The DELTA CEP A has three different memory dump functions: 
...

  • Page 46: Patch

    DAW project. When playing the song back, the DELTA CEP A is automatically loaded with the sound settings that were used during the production of the song.

  • Page 47: Note-Trigger And Note Priority Settings

    TIP: Of course, you can also use all three methods to transfer from one device to the other device.
 TIP2: The DELTA CEP A will receive the dump as long as you are the fourth utility menu. Note-trigger and note priority settings Different generations of synthesizers had developed different electronic circuit technology to interrogate keyboards of synthesizers.

  • Page 48: Midi To Cv Interface

    
 MIDI to CV Interface The DELTA CEP A has a MIDI input and a dedicated MIDI to CV interface to convert the incoming MIDI signals into control voltages for external modules. Wiring of these control voltage outputs to inputs of the DELTA CEP A sections is not required as such connections are already internally wired.

  • Page 49: Midi Clock Synchronization

    
 MIDI clock synchronization The DELTA CEP A allows for synchronizing the LFOs, the timing of the effects (delay times and modulation speeds) and the speed of the interpolator to a MIDI clock. The internal clock, over the 'tapping' adjustable clock, is turned off as long as the unit receives a MIDI clock and as soon as MIDI clock synchronization is enabled.
  • Page 50 Press the [SNAP] button to turn MIDI synchronisation on or off. - - - SHIFT Press the [SHIFT] button to exit the utility menu. Enable MIDI Clock Transmission (DELTA CEP A Desktop Only) Button Knob/Button Description - - - SHIFT Hold down the [SHIFT] button to enter the utility menu.

  • Page 51: Tempo]-Button And Tempo Led At Midi-Sync Mode

    [TEMPO]-button and tempo LED at MIDI-sync mode If you synchronize the DELTA CEP A via MIDI, you can read the current status on the Tempo LED: [TEMPO]-button and tempo LED at MIDI-sync mode Button Button Tempo
 Description - - -...

  • Page 52: Tempo]-Button And Tempo Led When Running With Internal Clock

    [TEMPO]-button and tempo LED when running with internal clock The speed of the DELTA CEP A’s internal clock is dependent on the speed one taps quarter notes on the [TEMPO] button:
 
 [TEMPO]-button and tempo LED when running the internal clock Button Knob/ Tempo
...

  • Page 53: Clock-Output Jack And Clock-Divider

    In order to get the octave switching of the oscillator working correctly even at different tunings, we need a way to set the basic tuning of the module. This can be done in the tuning menu: Mastertuning of the DELTA CEP A Button Knob/Button...

  • Page 54: Setting Up Led Brightness And Color

    
 Auto Power-Down function (DESKTOP version only) The DELTA CEP A has a Power-Down function that turns the unit off after 30 minutes of inactivity. Before that happens, the DELTA CEP A starts flashing red. The 30 minutes timer will restart as soon as the unit receives a MIDI note message or you hit any button while it is flashing.

  • Page 55: Rt-311 Bridge

    The Swarm Oscillator should be installed in the same cabinet as close to the DELTA CEP A as possible. If you want to make this connection, you should definitely disconnect the power supply and unplug the power cord or power supply beforehand! Further information can be found in the V2.0 Update description of the Swarm...

  • Page 56: Technical Information

    Technical Information Eurorack sound module with semi-modular, paraphonic sound engine.
 Playmodes: Monophonic or 4 voices in paraphonic mode.
 
 Dimensions:
 68 TE Eurorack Module (345,1 mm x 129 mm x 30 mm)
 68 TE Desktop Cabinet (350 mm x 140 mm x 90mm)
 
...

  • Page 57: Glossary

    Glossary 13.1 Filter (lowpass, bandpass, highpass) You certainly know about filters from optics. If you bring a transparent, red disc into a ray of light, only red light passes thru the optical filter. Sound filters are quite similar. While a red filter in the optics only passes red light, a lowpass filter in audio circuits only passes frequencies below the cutoff frequency.

  • Page 58: Interpolation

    Its measurement points are its snapshots in this case. For each of the parameters that have changed between the snapshots, the DELTA CEP A calculates the necessary intermediate values to produce a smooth sound transition and no sudden changes. This...

  • Page 59: Midi

    13.3 MIDI It's hard to imagine today - but before 1983, there was no consistent protocol that could have been used to combine synthesizers from different manufacturers. Dave Smith (Sequential Circuits), in collaboration with Ikutaro Kakehashi (Roland Corporation), created a hardware interface and associated protocol that was technically appropriate, easy to implement, and easy to control.

  • Page 60: Waveforms

    13.4 Waveforms Oscillators and LFOs generate periodic, varying output voltages. If one plots these output voltages into a graph, one sees the resulting oscillation forms. In subtractive synthesizers, the following modes of vibration play a special role: SINE TRIANGLE Sawtooth Rectangle The sine waveform is a fundamental without overtones.

  • Page 61: The Difference Between A Gate And A Trigger Signal

    13.6 The difference between a gate and a trigger signal In my conversations with Modular Synthesizer newbies, the question arises every now and then about what the difference is between a gate signal and a trigger signal. The subject can be a bit confusing, because you usually give a gate signal to an ADSR envelope and still talk about trigging the envelope.

  • Page 62: Preset Patches

    Preset Patches Patches Patches Patch Categ Bemerkungen Verbindungen 1 Bombast Rectangle Lead Fat Rectangle Solo Sound. 2 Brassy Lead Keyboard Velocity is assigned to the Cutoff-frequency. 3 Fusion Lead Percussive lead sound. 4 Distorted Lead Saturated Melody sound. 5 Mystic Ground Mystical FX sound.
  • Page 63 Patches Patches 8 PhaserPad Two Phaser modulation speeds in LFO OUT->FILTER one Pad sound. CUTOFF 1 Chamäleon Lead 8 Snapshots for eight different sounds. 2 Moog Intervall Sequencer sound. 3 Basic Sequence Chord Memory preset. 4 Klangsequenz Sequence over 8 snapshot. 5 ResoShimmer Filter Resonance FX.

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