SPL TwinTube 2920 User Manual

SPL Analog Code ® Plug-in

Manual

TwinTube Processor

2

TwinTube Analog Code® Plug-in

Manual

TwinTube Processor
Analog Code Plug-in

Model Number 2920
Manual Version 2.0 – 12 /2011

This user‘s guide contains a description of the product. It in no
way represents a guarantee of particular characteristics or results
of use. The information in this document has been carefully com­piled and verified and, unless otherwise stated or agreed upon,
correctly describes the product at the time of packaging with this
document.

Sound Performance Lab (SPL) continuously strives to improve its
products and reserves the right to modify the product described in
this manual at any time without prior notice. This document is the
property of SPL and may not be copied or reproduced in any way, in
part or fully, without authorization by SPL electronics GmbH.

SPL electronics GmbH

Sohlweg 80, 41 372 Niederkruechten, Germany
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
Website: spl.info

© 2011 SPL electronics GmbH. All rights reserved.

The SPL logo, The Analog

Code

®

, Vitalizer® and Atmos® are trademarks of SPL electronics GmbH.

All

other logos and brand names are registered trademarks of their respective

owners.

3

TwinTube Analog Code

®

Plug-in

Content

Installation 4

Plugin Alliance Activation 4
System Requirements and Compatibility 4
MAC and Windows Installation 4

Introduction 5

The Analog Code

®

5

TwinTube 5

Control Elements 7

Mouse Wheel Control 7
Power LED 7
HAR. ON/SAT. ON 7
HARMONICS Control 7
HARMONICS Switches 8
SATURATION Control 8
Signal LED 9
Overload LED 9
Settings A, B, C, D 9

Applications 10

Vocals 10
Acoustic Guitars 10

Your Notes 11

4

TwinTube Analog Code® Plug-in

Plugin Alliance Activation

Your Analog Code plug-in must be activated in your Plugin Alliance
account. You can set it up and log into your account anytime at

http://www.plugin-alliance.com

For details about the activation process, read the Plugin Alliance
Activation Manual. The PDF file is stored in the same folder of your
computer like this product manual file.

Alternatively, the following web page provides the same informati­on: http://www.plugin-alliance.com/activation

System Requirements and Compatibility

For details about system requirements and supported platforms or
formats visit http://www.plugin-alliance.com/compatibility

MAC and Windows Installation

1. Check for the latest plug-in software version before installation:

http://software.spl.info/download

2. Execute the installer file and follow the instructions.

Installation

TwinTube Analog Code® Plug-in

5

Introduction

The Analog Code

®

While SPL hardware products have been fascinating audio pro­fessionals from home studio owners to mastering engineers in
the world’s most renowned facilities for years, the need for this
technology in the form of plug-ins has also been an ever-growing
demand. With the Analog Code® plug-ins we have finally accom­plished our much desired goal: to transfer to the digital domain the
high quality we have striven to achieve with our analog processors
throughout several decades.

The first time we ever heard a software that fulfilled our expecta­tions, one of our hardware developers said to the programmers:
“you have cracked the Analog Code” — thus was coined the name
of our digital products.

TwinTube

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

In the original analog design, the 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. >

6

TwinTube Analog Code® Plug-in

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 very well 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 spatial qualities through its
processing of specific regions of the overtone series. In the analog
original of the TwinTube Processor, 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 to do nothing 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). The TwinTube harmonics control effects a rather 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.

Introduction

TwinTube Analog Code® Plug-in

7

Control Elements

Mouse Wheel Control

All SPL Analog Code plug-ins support mouse wheel control for
rotary controls and faders. Place the mouse cursor over a rotary
control or fader and move the wheel or scroll ball of your mouse
to adjust the control or fader. Hold the CTRL (Windows) or APPLE/
COMM AND key while moving the wheel or scroll ball for fine adjust­ments with higher control resolution.

Power LED

With a click on the POWER LED you can turn the
TwinTube on or off. The switch settings of HAR. ON and
SAT. ON are stored so that the previous state is recalled when the
TwinTube is activated with the POWER LED switch function. The
POWER LED is illuminated when the plug-in is activated.

HAR. ON/SAT. ON

Activating HAR. ON engages the HARMONICS control.
Likewise you engage SATURATION with the switch SAT. ON. When
turned on, these switches illuminate. One of the both processing
stages can be applied therefore respectively separately. Similarly
you can process the signal with both stages at the same time.

HARMONICS Control

With the HARMONICS Control you can adjust the over­tone processing intensity. The level range of a chosen
center frequency (see “HARMONICS Switches” on page

8) lies between 0 and 15 dB. Overtones are marked
also as “Harmonics”. The HARMONICS control results in an enrich­ment of the overtone range for a chosen fundamental tone (see
“Introduction” on page 5 and 6). The tonal result is an intensifica­tion of the presence that produces a fresher, silky and more brilliant
aural image. Similarly, the signal’s spatial qualities gain intensity.

8

TwinTube Analog Code® Plug-in

Control Elements

HARMONICS Switches

With the HARMONICS switches you choose the fre-

quency range of the fundamental tone area that should
be processed with the HARMONICS control. There are four avail­able frequency ranges. For reasons of space, we have rounded fre­quency values for the front lettering.

Filter 1:
Center Frequency: 9,8 kHz, Bandwidth: 9.6 kHz, Max. Gain: +15 dB

Filter 2:
Center Frequency: 6.6 kHz, Bandwidth: 5 kHz, Max. Gain: +15 dB

Filter 3:
Center Frequency: 2.8 kHz, Bandwidth: 9 kHz, Max. Gain: +15 dB

Filter 4:
Center Frequency: 1.9 kHz, Bandwidth: 4.7 kHz, Max Gain: +15 dB

The frequency ranges are based upon our experiences and test
series to offer ideal processing ranges for a wide variety of instru­ments (and vocals of course). You may find further information
under „Applications” on page 10.

SATURATION Control

As the name implies, the SATURATION control deter-

mines the degree of the tube saturation. At the most

extreme level this SATURATION control output level

may increase the overall output level by approximately

6 dB.

The SATURATION control offers a wide range of effects intensity
from most subtle to brutal harmonic distortion. Aside from har­monic tube distortion, the accompanying tube limiting effect
should also be considered. For further details on the saturation
effect refer to the “Introduction” on page 5 and 6.

TwinTube Analog Code® Plug-in

9

Signal LED

The SIG. LED indicates that an audio signal reaches the input. In
the analog world this LED helps the operator especially in complex
setups to determine immediately whether the TwinTube actually
receives any signal. In the digital domain it simply tells you that the
channel where you inserted the plug contains a signal that is loud
enough to ensure correct processing.

Overload LED

The OVL LED indicates internal clipping. Wether the clipping is
audible or not depends on the kind of audio material you are pro­cessing. Nevertheless it should be avoided that the OVL LED illumi­nates. Reduce the input level or processing values if the OVL-LEDs
keeps flashing.

Settings A, B, C, D

The settings feature allows to store four different sets
of adjustments (A, B, C, D). Much faster than with the
usual save and recall preset dialogs, the respective current setting
is stored automatically when you switch to another setting – to re­call previous settings by just one click.

For example, leaving setting A (by calling another setting) stores
the current parameter setting under A, calling B restores the last
adjustment made under B.

Settings A, B, C, D can also be included into the automation of
host applications to apply different sets of parameters to different
parts of a song.

Control Elements

10

TwinTube Analog Code® Plug-in

Applications

Here we refer to only two significant examples, of course with­out suggesting completeness. We would like to simplify starting
with the TwinTube by sharing some thoughts and experiences.
The effects and results described here can be applied to many
other instruments—nothing should keep you away from using the
TwinTube without restriction.

Vocals

Optimizing vocal tracks is a highlight among the processing appli­cations of the TwinTube. Often further EQing is not necessary
anymore in order to lift a voice from a mix and get it up front. A
recommendation for female voices: HARMONICS switch to 6,
HARMONICS control to about 2 o’clock, SATURATION to about 12
o’clock.

With these settings the described effect should be clearly audible
and from here individual tracks can be optimized. With female
voices we suggest trying HARMONICS switch settings 6 and 10
while switching between 2, 3, and 6 with male voices.

Acoustic Guitars

The success in treating e-guitars depends on previous recording
and processing gear and techniques—if tube amps and further
effects were already applied, it is hard to foresee how much the
TwinTube can contribute when optimizing or designing a sound.

In contrast to e-guitars, there is a huge potential in processing
acoustical guitar tracks. Picking sounds can be intensified, in gen­eral tube saturation and limiting can improve loudness and con­denses the sound. Presence is emphasized and the instrument
cuts through a mix much better without raising levels too much.
A well chosen amount of harmonic distortion always adds some
roughness which may often be a nice touch in several playing
styles.

TwinTube Analog Code® Plug-in

11

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Your Notes

SPL – Sound Performance Lab

Sohlweg 80, 41372 Niederkrüchten, Germany

Fon: [phone]
Fax: [phone]

E-Mail: [e-mail], Website: spl.info

TwinTube Processor

Analog Code

®

Plug-in

Manual