KORG microAUDIO 22 Audio Interface Owner's Manual

micro AUDIO 22
AUDIO INTERFACE
Owner’s Manual

Contents hide

1 Introduction

2 Parts of the micro AUDIO 22

9 Documents / Resources

9.1 References

Introduction

Thank you for purchasing the Korg micro AUDIO 22 audio interface.

Conventions in this manual

Specifications and appearance of this product are subject to change without notice.
The product shapes and display content illustrated in this manual may differ somewhat from the actual product.
Symbols used in this manual

Indicates an explanation you should heed to ensure that you can correctly utilize the capabilities or functionality of this unit.
Note Indicates an explanation that requires your attention.
Tip Indicates supplementary information that is useful to know.

* All product names and company names are the trademarks or registered trademarks of their respective owners.

Main features

Rigorously selected high-quality parts
Both the mic and line inputs use a high-quality operational amplifier for audio use in the preamp circuit, offering a Fully Balanced Configuration. The line inputs feature a buffer circuit driven by a J-FET input operational amplifier, which features low noise and distortion for the input of accurate sound.
High-precision thin-film metal resistors are used to deliver even clearer sound.
Supports audio formats of a maximum of 24-bit/192 kHz
The unit works via USB bus power—just plug it into your computer to operate.
Mic/Line (Hi-Z) can be used for channel input
The unit features combo input jacks that accept XLR or phone plugs, and support balanced input. The XLR jacks provide +48 V phantom power.
A stereo link function lets you use both input jacks for stereo input and control the input gain using a single knob. The output jacks feature TRS phone jacks for balanced output.
Loopback feature
You can use music that’s played back from your computer in a live stream or video chat, or as a source for sampling into your DAW.
Monitor mix functionality
This unit can be used for latency-free direct monitoring, to which you can mix the output audio from your computer.
DSP effects for dynamics control
A noise gate and compressor/limiter is available for each channel. Carefully selected parameters let you make quick adjustments to the input sound.

Parts of the micro AUDIO 22

Top panel

INPUT GAIN section
IN 1, 2 knobs: These adjust the input gain of signal from the IN 1 and 2 jacks.
IN 1, 2 LED: Lights up when the input signal level reaches the limit.
Tip: The input signal is clipped when the LED is lit. In this case, adjust the input gain or lower the output level on the connected instrument.
LINK switch: Switches the stereo link on/off. This sets whether the signal input from the IN 1 and IN 2 jacks is treated as monaural signals or as a stereo signal. When this is ON, the IN 1 knob controls both the IN 1 and IN 2 signals, and the IN 2 knob is disabled.
Tip: For inputting stereo audio, use the IN 1 jack for the L channel and the IN 2 jack for the R channel, and turn the LINK switch ON.
+48V switch/LED: When this is set to +48V, +48 V of phantom power is supplied to all XLR jacks (both IN 1 and IN 2). When this is ON, the LED lights up.
Tip: If a cable is not plugged into the XLR jacks, the LED will not light up even when the switch is on.
Do not turn this switch on before you connect a condenser mic. Also, do not pull out the mic or the XLR plug while the switch is on.
Do not turn this ON for devices connected to the XLR jacks that don’t require phantom power supply. Doing so may cause a malfunction.
When this switch is on, phantom power is switched on for both XLR jacks of IN 1 and IN 2. You can’t switch phantom power on/off for just one of the jacks.
Envelope Follower MONITOR MIX knob
Adjusts the volume balance between the signal input to the IN 1, 2 jacks and the signal output from the computer (such as a DAW).
Tip: The input signal from the IN jacks is output without passing through the computer connected via USB (such as a DAW: direct monitoring).
Tip: When you turn the knob all the way to the IN side, you only hear the sound from the IN 1/2 jacks; and when you turn the knob all the way to the USB side, you can only monitor the sound from the computer (such as from a DAW) that’s connected to the USB port.
MONO/ST switch
This sets whether the signal input from the IN 1, 2 jacks is treated as monaural (MONO) or stereo (ST).
When set to MONO, the sound from IN 1 and IN 2 is mixed together and output.
When set to ST, the sound input to IN 1 is output to the OUT 1 and to headphone out L, and the sound input to IN 2 is output to OUT 2 and to headphone out R.
Note: Set this to MONO if you only want to use one channel.
MAIN VOLUME knob
Adjusts the volume of OUT 1, 2.
Level meter
Displays the output level.
The topmost LED (red) lights up when the output signal is clipped.
In this case, use the IN 1, 2 knobs to adjust the input signal level, or adjust the output level from your computer.
Tip: If the LED lights up, the digital data region is close to the clipping level. Adjust the analog input or computer output level.
(headphones) knob
Adjusts the headphones volume.
Other indicators
USB LED: Lights up when power is being normally supplied via the USB cable to the micro AUDIO 22.
FX LED: Lights up when the FX (effect) function is in use. You can use the editor or plug-in to configure the FX functions.
See the Owner’s Manual of the editor/plug-in for details.

Rear panel

IN 1, IN 2 jacks
You can connect a mic via the XLR connector, and instruments such as guitars and other line-level signals can be connected via the 6.3 mm (1/4˝) TRS phone jack.
The IN 1 and IN 2 jacks support balanced input.
Note: The XLR jacks are dedicated mic-level inputs. Use the TRS phone jacks if you want to input line level signals with a balanced connection.
OUT 1, OUT 2 jacks
Connect these jacks to a powered monitor speaker or similar equipment. The volume is adjusted using the MAIN VOLUME knob.
The outputs on this device are DC-coupled. Be careful not to overload the voltage.
(headphones) jack
Connect your headphones here. The volume is controlled by the (headphones) knob.
To avoid malfunctions and other problems, use a headphone with a cable that’s no more than 3 m long.
The outputs on this device are DC-coupled. Be careful not to overload the voltage.
(USB) port
Use the included USB cable to connect the micro AUDIO 22 to the USB (Type-C) port on your computer.

Getting ready

Installing the driver
To use this device with a Windows PC, install the KORG micro AUDIO Audio Driver.
For details, download the driver and related documentation from the Korg website (www.korg.com).

Connections
Listening to the computer’s audio

Use the micro AUDIO 22 to listen to the sound of the audio or the video that’s playing back on your computer.
Use the included USB cable to connect the micro AUDIO 22 to the USB (Type-C) port on your computer.
Once you connect the USB cable, the micro AUDIO 22 turns on, and the (USB) LED lights up.

Connect this device directly to the USB port on your computer without using a USB hub.
To avoid malfunctions or other problems, use a USB cable that’s no more than 3 m long.

When using a DAW application

Use a DAW application that’s installed on your computer to record the audio from your guitar, mic or other instrument.
You can use the loopback feature to record your computer’s audio into your DAW application.
Visit the KORG App help center for the settings you need to make in your DAW application.
Note: When using the loopback function, select Input 3–4 ch, which are assigned on your DAW or other software for loopback.

Turn off the power of all devices before you make any connections to avoid damaging your equipment. Before making any connections, turn the INPUT/OUTPUT knobs for all channels all the way down.

Basic operations

Installing the software and making connections

Before connecting this unit to your computer, install the micro AUDIO EDITOR and KORG micro AUDIO Audio Driver that are supported by your computer’s operating system, available at the Korg website.
connect monitor speakers or similar equipment to these jacks to the OUT 1 and OUT 2 jacks.
Use the included USB cable to connect this unit to your computer. This turns on the unit.

Basic DAW settings

Launch the DAW that’s installed on your computer, and open the audio settings.
Set this unit to be the input and output interface for the DAW.

Editor

Use the micro AUDIO EDITOR (for Windows and macOS) to configure the insert effects.
Download the software from the Korg website, and follow the instructions in the supplied document to set up the software.
See the Owner’s Manual of the micro AUDIO EDITOR for the parameters and how to use the micro AUDIO EDITOR.

Specifications

Audio format
Sampling rate: 44.1 kHz/48 kHz/88.2 kHz/96 kHz/176.4 kHz/192 kHz
Bit rate: 24-bit
Mic input
Dynamic range: 109 dB (A characteristic)
THD+N: less than 0.015% (minimum gain, -1 dBFS input)
Maximum input level: -2 dBu (minimum gain)
Gain range: 56 dB
Impedance: 1.5 kΩ
Line input
Dynamic range: 109 dB (A characteristic)
THD+N: less than 0.004% (minimum gain, -1 dBFS input, 22 Hz/22 kHz bandpass filter)
Maximum input level: 12 dBu/18 dBu (SE/ DIF) (minimum gain)
Gain range: 56 dB
Impedance: 1 MΩ/2 MΩ (SE/DIF)
Line output
Dynamic range: 109 dB (A characteristic)
THD+N: less than 0.0015% (minimum gain, -1 dBFS input)
Maximum output level: 10 dBu/16 dBu (minimum gain)
Impedance: 330 Ω/660 Ω (SE/DIF)
Headphone output
Dynamic range: 107 dB (A characteristic)
THD+N: less than 0.0015% (minimum gain, -1 dBFS input, 22 Hz/22 kHz bandpass filter)
Maximum output level: 10 dBu (minimum gain)
Impedance: 20 Ω
Jacks and ports
IN 1, 2 jacks (XLR/6.3 mm TRS monaural phone jack), OUT 1, 2 jacks (6.3 mm TRS monaural phone jacks), (USB) port (Type-C), (headphones) jack (6.3 mm stereo phone jack)
Power supply
USB bus power
Current consumption
800 mA or less
Dimensions
150 mm (W) x 128 mm (D) x 68 mm (H)/5.91˝ x 5.04˝ x 2.68˝
Weight
407 g/0.90 lb
Included items
USB cable, Quick Start Guide
* Specifications and appearance are subject to change without notice for improvement.

Block diagram

Documents / Resources

KORG microAUDIO 22 Audio Interface [pdf] Owner's Manual
microAUDIO 22 Audio Interface, microAUDIO 22, Audio Interface

References

User Manual