Darkglass Electronics Microtubes Infinity Preamp Distortion Audio Interface User Guide
- July 4, 2024
- Darkglass Electronics
Table of Contents
- Quick Start Guide
- Connections
- Signal Chain
- Controls
- Touch Sensitive Slider
- Rotary Footswitch Encoders
- Basic Operation
- Bypass
- Performance Lock
- Bluetooth Pairing
- USB Audio Interface
- Setting up the drivers
- USB Routing
- Audio Routing
- Darkglass IR Library
- Technical Specifications
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Darkglass Electronics Microtubes Infinity Preamp Distortion Audio Interface
User Guide
Quick Start Guide
Connect your instrumentinto the 1/4” INPUT.
Connect a compatible power supply (9V center negative, min. 500 mA)to the power connector.
- Connect atleast one ofthe following:
- Headphones into the headphone jack
- USB-C cable between the USBconnector and your computer*
- Instrument cable between one ofthe balanced 1/4” outputs and your amplifier’s input
- XLR cable between DIRECT OUTPUT and your mixing desk or audio interface
The Microtubes Infinity is pre-programmed with three presets, A,B, and C that
are selectable via the dedicated footswitches. Press and hold one ofthe
footswitches for two seconds to save your changes into a preset. Three
additional presets can also be accessed via MIDI orthe Darkglass Suite.
Adjustthe level (and headphone volume, if applicable)to your liking and start
playing!
Using the Microtubes Infinity as an audio interface may require some extra
steps depending on your operating system
Connections
Input: This is the primary instrumentinput on the Microtubes Infinity.
Connect your instrument or outputfrom your pedal board to the 1/4” mono jack.
Aux In : The stereo input ofthe Microtubes Infinity enables the playback
of backing tracks while practicing or recording. Connect your mobile phone,
laptop etc.to the 1/8” stereo jack.
Headphone Output: The headphone output can handle headphones with an
impedance of16 – 600 ohms. Connect your headphones to the 1/8” stereo jack and
setthe desired levelfrom the dedicated potentiometer nextto the jack.
Balanced Outputs: The two balanced outputs add routing versatility and
the option of using the Microtubes Infinity as a fully equipped audio
interface. Connect your studio monitors, amplifier or other effects to the
1/4” balanced jacks using a TRS connector (Tip +, Ring -, Sleeve GND).
If you feed an unbalanced inputfrom these outputs, use an instrument cable
with a mono 1/4” plug.
Direct Output: An XLR output with a ground lift switch provides a
reliable standard connection to a mixing desk or an external audio interface
for a guaranteed low-noise signal.
MIDI In : A standard 1/8” TRS (TypeB) jack allows connecting an external
MIDI controllerto the Microtubes Infinity for even more flexibility. Read more
aboutthe MIDI capabilities at
https://[www.darkglass.com](http://www.darkglass.com)/creations/microtubes-
infinity/
USB: The USB-C port unlocks the Microtubes Infinity USB audio interface
capabilities and enables interaction with the Darkglass Suite desktop app,
allowing for software updates and access to the Darkglass IR library,
containing hundreds of cabinet simulations. USB MIDI is also supported.
Signal Chain
The position ofthe Cabsim block in the signal chain can be changed from the Suite
Block Diagram
MODES 1, 4 AND 5
MODES 2 AND 3
Compressor: This control allows setting the input gain of the compressor
that will translate into how much the signal is compressed while our
intelligent make-up gain algorithm keeps the output of the compressor at
usable levels. The compressor has 5 ratios available: 4:1, 8:1,12:1, 20:1 and
ALL IN. Distortion: The Microtubes Infinity has 5 different preamp modes;
a clean multi-band tube preamp, MicrotubesB3K and Vintage Microtubes
distortions in both normal and multi-band modes.
Cabinet Simulation: The Microtubes Infinity supports Impulse Response
(IR) cabinet simulations and has 5 cabinet slots on board. The defaultIRs have
been selected by the Darkglass Team. New IRs can be assigned to the 5 slots
using the Darkglass Suite (desktop or mobile).
Blend: The blend control allows you to mix the distorted/preamp signal
with the clean sidechain signal. Depending on the distortion/preamp setting
the clean sidechain is eitherfull-band or low-band signal.
EQ: Lastin the signal chain is a programmable 6-band graphic
equalizerthat allows you to tailor your sound even further. The full
description ofthis functionality can be found in the “Controls” section ofthe
manual.
Controls
Smart Potentiometers
On the Microtubes Infinity, you will find five smart potentiometers:
Compression, Drive, Mod,Blend, and Level. These potentiometers are the main
interface for sculpting the signal chain and your overall sound on the
Microtubes Infinity.
The Compression potentiometer is the one-knob solution for compression on
the Microtubes Infinity. This controls the amount ofinput gain to the
compressor and intelligently applies the correct amount of makeup gain so that
your signal is always driven atthe appropriate level, no matter how much
compression is applied.
The Drive potentiometer adds distortion and drive to our signal (modes
2-4) or blends in the tube preamp emulation (mode 1). Crank this knob to add
more saturation or characterto your distortion/preamp part of the signal
chain.
The Tone/Era potentiometer allows you to go from dullto crisp and anything
in between. On the Vintage Microtubes (modes 2 & 4) you getthe coveted ERA
control which covers different decades of classic bass tones.
The Blend potentiometer mixes between the distortion signal and the clean
sidechain signal.
The Level potentiometer controls the master volume of the Microtubes
Infinity.
The smart potentiometers allow fortheir positions to be stored in each preset,
with the stored position indicated by the ring of LEDs surrounding each
potentiometer.
With this, you can get a glance at your signal chain settings when changing
presets, regardless ofthe physical potentiometer setting.
Touch Sensitive Slider
Atthe center ofthe Microtubes Infinity are the touchsensitive sliders that
controlthe 6-band graphic EQ at the end ofthe signal chain.
Each slider has a -12 dBto 12 dBrange. From leftto right, the frequency bands
for each slider correspond to a low shelf, 250 Hz, 500 Hz,1.5 kHz, 3 kHz, and
a high shelf. You can also change the frequency bands to 100 Hz, 200 Hz, 400
Hz, 800 Hz,1.6 kHz, 3.2 kHz in the Darkglass Suite.
Controlling the touch sliders is easy – swipe upwards to boost a frequency
band or swipe downwards to cut a frequency band.
When swiping,the position ofthe slider is also reflected on the potentiometer
LEDs. Double-tap the sliderto resetthe band back to 0 dB.
Hint: The sliders respond to thedirection of your swipe on anypart ofthe
slider, so you can make small adjustments without your finger covering the
actualposition ofthe slider.
Rotary Footswitch Encoders
Below the touch sliders are three rotary footswitch encoders -∞, ?, and +∞,
which can be pressed or rotated. These footswitch encoders enable many ofthe
Microtubes Infinity’s functions. Simply press A, B, or C to switch to the
preset stored in thatfootswitch.
The rotational position of each encoder is displayed on the five LEDs under
each encoder. Additionally, when rotating,the position is shown on the
potentiometer LEDs – this is a visual aid that does not affectthe
potentiometer configuration.
- Rotating -∞ allows you to change the compressor ratio or bypass the compressor.
- Rotating ? allows you to change the distortion mode or bypass the distortion.
- Rotating +∞ allows you to change the active IR in the signal chain or bypass the IR.
- When none ofthe five LEDs are lit,the respective compressor/distortion/IR is bypassed.
Rotating 0 allows you to bypass or change the distortion mode. The modes are:
- Clean tube preamp
- Vintage Microtubes
- MicrotubesB3K*
- Vintage Microtubes multi-band*
- MicrotubesB3K multi-band*
Bluetooth/USB connection and Dark glass Suite application are required to access the extra controls, like GRUNT, MIDBOOST, high-pass and low-pass filter .
Basic Operation
Editing and saving presets
Editing and saving presets on the Microtubes Infinity is remarkably easy. If
any ofthe parameters are changed (i.e. potentiometers, sliders, encoder
rotation),the color LED of your current preset will gently breathe, indicating
thatthe edit or audition mode is active.
Auditions are an easy way to try new sounds and settings, which can be either
saved or discarded. When you find a sound that you would like to save,the
audition can be saved into any ofthe three presets by pressing and holding one
ofthe presetfootswitches fortwo seconds. All LEDs on the Microtubes Infinity
will flash rapidly a few times indicating that your edits have been saved into
a preset.
A new audition is always entered when changing any parameter from an
unedited/saved preset. This will overwrite any previous unsaved
auditions/edits.
During an edit/audition, you can change to any of the three saved presets by
pressing the footswitch associated with that preset. After changing to a
preset, pressing the footswitch again will swap between that preset and your
active editing session.
Presets can also be saved, edited, shared, loaded, and managed in the Darkles
Suite.
For instructional videos on editing and saving the presets, please visit
https://[www.darkglass.](http://www.darkglass.) com/creations/microtubes-
infinity/
Tuner
To enterthe tuner, press 0 and +∞ simultaneously. To exit the tuner, press 0
and +∞ simultaneously or one of the footswitch presets. The Microtubes
Infinity will always return to the last active preset. The Microtubes Infinity
will not output any audio when tuning.
The Microtubes Infinity features a five-octave chromatic tuner, which can tune
any note between A0 and A#5, allowing you to dial in any guitar or bass tuning
that you desire. The tuning is derived from A4 = 440 Hz. Only one note can be
tuned at a time.
When the tuner mode is entered and there is no input signal,two red LEDs on
the two rightmost sliders are shown by default. When an input signal is
received, the left section of sliders will update to show the note that you
are tuning.
A small indicator is displayed to the top right ofthe note if itis a sharp
note.
When tuning,the two rightmost sliders will update to show how close yourtuning
is from the note’s perfect pitch. Distance below the center line indicates
thatthe note is tuned flat, and distance above the center line indicates
thatthe note is tuned sharp. The red LEDs will transition to green as you
approach the perfect pitch, and the slider and preset LEDs willfully
illuminate in green when you are on perfect pitch.
Bypass
To enterthe bypass mode, press -∞ and ? simultaneously.
To exitthe bypass mode, press -∞ and ? simultaneously or one ofthe footswitch
presets.
In this mode,the Microtubes Infinity does not perform any processing on the
input signal, and passes theunprocessed input signalthrough to the outputs.
All LEDs are turned off during bypass mode
Performance Lock
To enter or exitthe performance lock, press A and C simultaneously.
In this mode, all LEDs will gently breathe on the Microtubes Infinity to
indicate thatit has been locked. This mode prevents any accidental parameter
changes or edits to your presets. You can still change between the saved
presets A,B, and C, and enterthe tuner or bypass modes, but potentiometer
updates, slidertouches, or encoder rotations will notrespond to any changes.
Tip: Entertheperformance mode after the soundcheck while laying live
gigs.
Bluetooth Pairing
To begin Bluetooth pairing with the Microtubes Infinity, press and hold an encoder while simultaneously rotating the encoder. The five LEDs under each encoder will illuminate one-by-one, and pairing will begin when all five are lit. Look for “Microtubes Infinity” on your list of available Bluetooth devices.
USB Audio Interface
Whatever your DAW of choice is, it’s compatible with the Microtubes Infinity.
You can record your processed signalto one track and simultaneously record an
unprocessed copy to anothertrack. Recording a stereo track atthe same time
from the Aux inputis also possible.
The Microtubes Infinity supports 48 kHz and 44.1 kHz sampling rates.
Setting up the drivers
If you are using a Mac, no additional drivers are required to use the Microtubes Infinity as an audio interface. If you are using Windows, please download the latest USB audio drivers from https://[www.darkglass.com](http://www.darkglass.com)/ suite/. Please referto the Darkglass website for more details regarding USBaudio.
USB Routing
USBoutput(to Microtubes Infinity)
- Output1: Balanced left + Headphone left
- Output 2: Balanced right + Headphone right
- Output 3: Balanced left
- Output 4: Balanced right
- Output 5: XLR DI (mono)
Both Mac and PC send system audio to outputs 1 and 2 by default, so you can
always use the Microtubes Infinity’s stereo output of choice without having to
set up any extra routing.
The level ofthese outputs is controlled by the small volume potentiometer
atthe top ofthe Microtubes Infinity. The other outputs have no volume control
on the Microtubes Infinity.
USBinput(from the Microtubes Infinity)
- Input1: Processed signal
- Input 2 : Unprocessed raw signal
- Input 3 : Aux left +Bluetooth left
- Input 4 : Aux right +Bluetooth right
Audio Routing
When the Microtubes Infinity is not bypassed, the Level potentiometer always
controls the volume of your instrument input at alloform outputs, and has no
effect on the USB/Aux/Bluetooth audio.
When the Microtubes Infinity is bypassed, the Level potentiometer has no
effect.
Your instrument, Aux input, and Bluetooth audio is routed to the headphone and
balanced outputs. The media volume at these outputs can be controlled with the
small potentiometer at the top of the Microtubes Infinity
- When using the balanced outputs,the media volume and instrument volume level are separately controlled (small volume potentiometer atthe top ofthe Microtubes Infinity and the Level potentiometer, respectively).
- When using headphones,the volume is controlled in the same way, with one exception:the headphone volume potentiometer acts as an overall master volume for both media and your instrumentinput.
- The XLR DI outputis routed only with your instrument output and USBoutput 5.
The media playback volume level on the Microtubes Infinity is not applied to USBinputs 3 and 4.
Darkglass IR Library
The Darkglass Suite software currently comes with an extensive library ofIR files and hundreds more will be added in the nearfuture. The library consists of both bass and guitar cabinets. Captures of Darkglass Elite Series and Neodymium Series cabinets are available, among others.
Technical Specifications
Input impedance :1 MΩ
Output impedance: 220 Ω
Current consumption: ~500mA
Voltage: 9VDC (center negative)
DARKGLASS is a registered trademark in the U.S., number 4,616,801, owned by
Darkglass Electronics Oy. Designed by Revolve Studio
https://[www.darkglass.com/](http://www.darkglass.com/)
References
- Microtubes 200 – Darkglass Electronics
- Darkglass Electronics
- Suite – Darkglass Electronics
- Careers – Darkglass Electronics
- Creations – Darkglass Electronics
- Dealers – Darkglass Electronics
- Microtubes Infinity Manual – Darkglass Electronics
- Privacy Policy – Darkglass Electronics
- Suite – Darkglass Electronics
- Login • Instagram
- Revolve Studio • Custom Web Design Services in Helsinki
Read User Manual Online (PDF format)
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