SPL Transient Designer & TwinTube Processor with A to D

SPL Transient Designer & TwinTube Processor with A to D

SPL Transient Designer & TwinTube Processor with A to D

SPL Transient Designer & TwinTube Processor with A to D

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  • 1Description

The Transient Designer & TwinTube Processor with A to D from SPL is a combination of two processing systems that can cover a number of bases in a studio with its analog processing power. The combination of these two processors is actually more than the sum of its parts as each can act on the other for a greater and deeper affecting of the signals sent through it. It is effective on many types of percussive signals and can add a palette of sound-shaping possibilities.

The Transient Designer Module
The Transient Designer provides a different type of concept for level-independent dynamic processing. In this it differs in principle from common compressors that are based upon processing signals of a specific level. Working with the Transient Designer is very simple: attacks can be amplified or attenuated and sustain may be prolonged or shortened.

Technical foundation is SPL's Differential Envelope Technology (DET) which allows level-independent dynamic processing by calculating differences in generated envelopes. These envelopes are always tracking the curve of the original signal to provide positive results in the outcome of the sound.

Thanks to the level-independent processing DET, the setting of a threshold is unneccesary. Other common controls of dynamic processing, such as ratio or parameters for time-constants are automated and designed to be optimized adaptively in a musical manner according to the characteristics of the input signal.
So only two controls per channel are required to allow the user to completely reshape the attack and sustain characteristics of a sound: attack can be amplified or attenuated by up to 15 dB while sustain can be amplified or attenuated by up to 24 dB.

Thus, in a very obvious and simple way, the Transient Designer opens a worthwhile dimension in dynamic processing with many possibilities for dynamic manipulation and processing that would take many more pieces of gear to duplicate.

An additional feature of the Transient Designer module is the output-gain control that enables you to compensate changes in the level of the processed signal. This helps ensure a simple and safe adjustment of levels for additional devices - especially A/D converters.

The Transient Designer uses the THAT 2181-VCAs, which are particularly natural and transparent sounding and known for minimal distortion values. The 2181 processes highest amplitudes without damping of high frequencies or reducing bass.

Transient Designer - Applications
The Transient Designer is suited for use in professional recording, in project or home studios and sound-reinforcement applications.You can manipulate and control the attack and sustain characteristics of a signal regardless of level in an intuitive and more simple way. Usually equalizers are used to separate instruments in a mix - the tonal aspect of the signal is considered, but not the temporal aspect. The Transient Designer opens this further dimension in signal processing. By manipulating the attack and sustain curves of a sound event, the mix can be made to sound more transparent. Instruments can be mixed at lower levels while still maintaining their positions in the mix, but occupying less space.

During a remix, or in general after miking, you can arrange new positions of instruments. Reduce ATTACK and increase SUSTAIN to move signals back in the mix that are too present. Additionally, the FX parts of too-dry signals are strengthened. Applied to single instruments or loops, the Transient Designer allows you to create entirely new sounds and effects.

The TwinTube Module
The TwinTube module is the combination of two essential tube effects into a single processor; that is, saturation effects along with harmonics processing. Both stages work separately from each other and are based on an individual tube circuit; therefore, each module employs two tubes. The effects can therefore not only be applied both individually or separately, but also in common.

Saturation effects are generated through the tube being pushed to and beyond its normal operating limits. In contrast to semiconductors, a tube thus pushed to such levels does not clip from a certain level, approaching more gradually its level limits and thereby producing its typical tonal result, which in audio signal processing can have such often profitable aural effects­ - on one hand (and depending on the amount applied), from subtle to extensive harmonic distortion and on the other hand, a compaction of the sonic event, that is, a limiting effect that exhibits a pleasant, rounded or soft sound.

Acoustically and also in its range of applications, this can be compared with tape-saturation effects. Harmonic distortion and limiting are the generally known, "classic" tube effects, which are today cornerstones of sound processing. But other less known and potentially important effects are a tube's ability for improving presence and spacial qualities through its processing of specific regions of the overtone series.

A special circuit comes into play for overtone/harmonic processing that involves a combined coil/condenser system working in conjunction with the tube. The control reacts dynamically to the audio signal and thereby processes both overtones as well as a signal's phase structure.

The processing of the phase structure influences the moments of acoustic perception and occurs in microsecond time divisions; it has nothing to do with the cancellations one associates with 180-degree signal shifts. A decisive factor in resultant tonal quality is the alignment of level relationships in the overtone spectrum. Such overtone "enrichment" does not operate on the generator principle of exciters (wherein distortion is added to the original signal). In this case the TwinTube harmonics control effects rather in a more equalized overtone structure resulting in a sound which in effect appears much more in the foreground, but without doing so through extreme level changes. Thus, for example, a voice appears immediate apart from the overall mixture, "sitting" clearly outlined in the mix's foreground. This effect can work well with vocals and acoustical instruments, both of which are rich with tonal nuances.

24-Bit / 192 kHz AD Converter Module 1090
This Transient Designer & TwinTube Processor AD comes equipped with the 24-bit / 192 kHz A/D Converter Module 1090, and works with a plug-and-play design for easy installation and usage. It offers a S/P-DIF output with both coaxial and optical connectors in parallel. The heart of the module is a 24-bit converter with a variable sample rate of up to 192 kHz. Quartz oscillators help ensure a clean, low-jitter master clock. The internal sample rate can be switched between 44.1, 48, 88.2 and 96 kHz. Other sample rates (32, 176.4 and 192 kHz) are set by external syncronization.

The converter can be synced to other digital devices via a S/P-DIF input. The internal oscillators are automatically disabled when an external clock signal is present to prevent interference. An extremely effective voltage-stabilizing circuit ensures that the converter continuously receives sufficient and stable voltage - an important prerequisite for clean, transparent audio. The compact design minimizes the signal path to the converter. Grounding surfaces on both sides of the circuit board effectively reduce interference and ensure optimal separation between analog and digital components.

Features of Transient Designer Module
Only two controls allow the reshaping of attack and sustain characteristics of the signal
Increases or decreases impact of percussive sources
Reduces or increases room sound or preexisting reverb on sound source
Can substitute for gate, minimizing bleed in seconds
Features of TwinTube
Saturation effects are sonically comparable to tape saturation
SATURATION for more warmth and loudness; subtle to clear effects
HARMONICS for more presence and clarity without adding appreciable levels (as with EQs)
Moves signals to the front of a mix
Extremely versatile for all kinds of signals, such as vocals, acoustic guitars, drums, strings, brass
A to D Converter
This processor comes equipped with a 24-bit/ 192 kHz AD Converter module
In the Box
SPL Transient Designer & TwinTube Processor with A to D
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description
    Power Supply Common Technical Specifications Analog Elemental Series
    Toroidal transformer

    120 VAC, 60 Hz: 630 mA
    230 VAC, 50 Hz: 315 mA

    Voltage Selector: 115 V / 230 V

    Power Consumption
    @ 115 V: 5.6 W/7.1 VA
    @ 230 V: 9.1 W/10.8 VA
    Dimensions and Weight Housing (W x H x D): 19.0 x 1.7 x 12.6" (482 x 44 x 320 mm)
    (depth includes knobs and sockets)

    Weight: 10.6 lb (4.8 kg)
    Technical Specifications Transient Designer Module
    Frequency Response: 10 Hz to 70 kHz
    CMR: -80 dBu
    (at 1 kHz with 0 dBu input level/unity gain)
    THD&N: 0.019%
    (0 dBu input level/unity gain)
    S/N Ratio: -89 dBu
    Dynamic Range: 111.0 dB

    2 x XLR connector, electronically balanced, optionally transformer balanced
    Impedance: ca. 20 kOhms
    Max. Input Level: +21 dBu

    2 x XLR connectors, electronically balanced, Output 1 optionally transformer balanced
    Impedance: ca. 150 Ohms
    Max. Output Level: +22 dBu

    TwinTube Module
    Harmonic Stage
    Frequency Range: 10 Hz to 80 kHz
    THD&N: 0.1 %
    (@ 1 kHz, 0 dBu input level, unity gain)
    S/N ratio, A-weighted: -87 dBu
    Dynamic Range: 103 dB
    Maximum Input Level: +18 dBu

    Harmonics Filter
    Filter 1
    Center Frequency: 9.8 kHz
    Bandwidth: 9.6 kHz
    Maximum Gain: +15 dB
    Filter 2
    Center Frequency: 6.6 kHz
    Bandwidth: 5 kHz
    Maximum Gain: +15 dB
    Filter 3
    Center Frequency: 2.8 kHz
    Bandwidth: 9 kHz
    Maximum Gain: +15 dB
    Filter 4
    Center Frequency: 1.9 kHz
    Bandwidth: 4.7 kHz
    Maximum Gain: +15 dB

    Saturation Stage
    Frequency Range: 10 Hz to 77 kHz
    THD & N: 0.02 %
    (@ 1 kHz, 0 dBu input level, unity gain)
    ca. 15 % @ 0 dBu input level and maximum saturation
    S/N ratio, A-weighted; -96 dBu
    Dynamic Range: 114 dB
    Maximum Input Level: +21 dBu

    AUDIO - CUMULATIVE (Harmonics and Saturation Stage)
    Frequency Range: 10 Hz to 77 kHz
    CMR: -74 dBu
    (@ 1 kHz, 0dBu input level, unity gain)
    Noise, A-weighted: -87 dBu
    Dynamic Range: 105 dB

    XLR connector, electronically balanced, opt. transformer balanced
    Max. Input Level: +20 dBu
    Impedance: ca. 20 kOhms

    XLR connector, electronically balanced, optionally transformer balanced
    Impedance: ca. 150 Ohms
    Maximum Output Level: +21 dBu

    Control Elements
    Signal-LED: -20 dBu
    Overload-LED: +18 dBu (peak hold 1.5 seconds)
    A/D Converter Internal sample rates: 44.1, 48, 88.2, 96 kHz
    External sample rates: 32 kHz, 176.4 kHz and 192 kHz
    Dynamic range: 112 dB (A-weighted)
    THD+N (@-1 dBFS/1 kHz): 0.0007%
    Frequency response (48 kHz): 10 Hz to 22kHz, ±0.2 dB
    Jitter (average; 700 Hz to 100 kHz): ‹ 300 ps
    Stop band attenuation: -105 dB @48  kHz; -102 dB @96 kHz
    0 dBFS: = +15 dBu
    Power consumption +15 V: max. 115 mA
    Power consumption -15 V: max. 17 mA
    Dimensions (W x H x D): 3.94 x 1.06 x 3" (100 x 27 x 76 mm)
    Weight: 2.39 oz. (68 g)
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