Zoom U-44 Portable 4x4 USB Handy Audio/MIDI Interface User Manual

Copying or reprinting this manual in part or in whole without permission is prohibited.

Operation Manual

Introduction

Thank you for choosing the ZOOM Handy Audio Interface. To achieve the best results—and to protect your

investment—please read this manual carefully and retain it for future reference. Use this product only as directed.

4-in/4-out Audio Interface

The ZOOM

is a high quality audio interface that supports audio recording and playback at resolutions up to 24-

bit/96 kHz.

Featuring an asynchronous transfer system,

is not impacted by computer jitter, and reproduces audio with

complete accuracy.

can be used with computers running Windows and Mac OS X, as well as with an iOS device.

High-Performance Mic Preamps

is equipped with high-performance mic preamps that are based on the same design as our H-Series Handy

Recorders.

+48V phantom power can be supplied to each input. INPUT 1 also supports Hi-Z input.

Additionally, H-Series mic capsules can be connected to the

Designed with the DJ in Mind

The

features 2 RCA outputs that make it easy to connect DJ mixers or other devices. The balance between

computer playback signals 1-2 and 3-4 can be adjusted for the LINE OUT 2 and PHONES outputs.

For example, you can balance the PHONES output between click and MAIN OUT signals during a live performance. Or

you can balance between the cue and MAIN OUT signals during a DJ performance.

Plus, the PHONES jack delivers enough volume output for use in clubs and other small venues.

Standalone AD/DA Mode

In standalone mode, the

can be used as a high-quality mic preamp and AD/DA converter.

can convert digital output from a DVD or Blu-ray player to analog output, and also convert analog input to

digital output.

Contents

Introduction

Introduction ………………………………………… 2

Safety and Usage Precautions ………………… 3

Part Names ………………………………………… 4

Connecting with a Computer/iOS device ……… 6

Recording …………………………………………… 11

Playback …………………………………………… 14

Connecting MIDI Devices ………………………… 18

Using Digital Audio Equipment ………………… 19

Connecting ZOOM H-Series Mic Capsules ……22

Using as a Standalone AD/DA Converter and Mic

Preamp (Standalone Mode) ………………………24

Troubleshooting …………………………………… 25

Specications ……………………………………… 26

Signal Flow Diagrams …………………………… 27

Safety and Usage Precautions

Safety Precautions

In this operation manual, symbols are used to highlight

warnings and cautions that you must read to prevent

accidents. The meanings of these symbols are as follows.

Warning

Something that could cause serious injury or

death

Caution

Something that could cause injury or damage

to the equipment

Other symbols used

An action that is mandatory

An action that is prohibited

Warning

Alterations

Do not open the case or modify the product.

Operation using an AC adapter

Never use any AC adapter other than a ZOOM AD-17.

Always hold the AC adapter itself when disconnecting it from an outlet.

Operation with external DC power supply

Use a 5V external DC power supply.

Carefully study the warning indications of the external DC power supply

before use.

Operation using batteries

Use 2 ordinary 1.5-volt AA batteries (alkaline or nickel-metal hydride).

Read battery warning labels carefully.

Always close the battery compartment cover when using the unit.

Warning

Caution

Product handling

Do not drop, bump or apply excessive force to the unit.

Be careful not to allow foreign objects or liquids to enter the unit.

Battery handling

Install the batteries with the correct +/− orientation.

Use a specied battery type.

Do not mix new and old batteries or different brands or types at the same

time.

When not using the unit for an extended period of time, remove the

batteries.

If a battery leak should occur, wipe the battery compartment and the

battery terminals carefully to remove all residue.

Operating environment

Do not use in extremely high or low temperatures.

Do not use near heaters, stoves and other heat sources.

Do not use in very high humidity or where it could be splashed by water.

Do not use in places with frequent vibrations.

Do not use in places with much dust or sand.

Mic handling

Before connecting a mic, always turn the power off. Do not use excessive

force when connecting it.

Attach the protective cap when no mic is connected for extended periods.

Connection cables and input/output jacks

Always turn the power OFF for all equipment before connecting any cables.

Always disconnect all connection cables and the AC adapter before moving

the unit.

Volume

Do not use at a loud volume for a long time.

Usage Precautions

Interference with other electrical equipment

For safety considerations,

is designed to minimize the emission

of electromagnetic waves and suppress interference from external

electromagnetic waves. However, interference could still occur if is

placed next to equipment that is very susceptible to interference or that

emits powerful electromagnetic waves. If this occurs, place the

and

the other device farther apart.

With any type of digital control device—including the —

electromagnetic interference can cause malfunction, corrupt or destroy

data, or cause other unexpected issues. Always exercise caution.

Cleaning

Use a soft cloth to clean the exterior of the unit if it becomes dirty. If

necessary, use a damp cloth that has been wrung out well to wipe it.

Never use abrasive cleansers, wax or solvents such as alcohol, benzene

or paint thinner.

Temperature considerations

The

may become warm after long periods of continuous use. This is

normal, as long as the unit does not become too hot to touch.

Breakdown and malfunction

If the

malfunctions or operates abnormally, disconnect it

immediately. Contact the store where you purchased the unit, or

contact ZOOM customer service with the following information: product

model, serial number, and the specic symptoms of the breakdown or

malfunction—along with your name, address, and telephone number.

Copyrights

• Windows

is a registered trademark of Microsoft

Corporation.

• Mac

, iPad

and Lightning™ are trademarks or registered trademarks

of Apple Inc.

• MIDI is a registered trademark of Association of Musical Electronics

Industry (AMEI).

• iOS is a trademark or registered trademark of Cisco Systems, Inc.

(USA).

• Other product names, registered trademarks and company names in

this document are the property of their respective companies.

Note: All trademarks and registered trademarks in this document are for

identication purposes only and are not intended to infringe on the

copyrights of their respective owners.

Recording for any purpose other than personal use from copyrighted

sources, including CDs, records, tapes, live performances, video works

and broadcasts, without permission of the copyright holder is prohibited

by law.

ZOOM Corporation will not assume any responsibility related to

infringements of copyrights.

Safety and Usage Precautions

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

•

Connect the equipment to an outlet on a circuit different from that to

which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

FCC regulation warning (for U.S.A.)

This equipment has been tested and found to comply with the limits

for a Class B digital device, pursuant to Part 15 of the FCC Rules. These

limits are designed to provide reasonable protection against harmful

interference in a residential installation. This equipment generates, uses,

and can radiate radio frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that interference will

not occur in a particular installation. If this equipment does cause harmful

interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct

the interference by one or more of the following measures:

Declaration of Conformity

For EU Countries

Part Names

INPUT 2 jack

Level indicators

GAIN knobs

Power indicator

MIC IN connector

PHONES jack

BALANCE knob

PHONES knob

PHANTOM switch

MAIN OUT knob

MAIN OUT jacks

LINE OUT 1 jacks

LINE OUT 2 jacks

DIRECT MONITOR knob

MUTE switches

Hi-Z switch

INPUT 1 jack

To p

XLR TRS

1: GND

2: HOT

3: COLD

TIP: HOT

RING: COLD

SLEEVE: GND

Part Names

POWER switch

OPERATION MODE switch

S/PDIF IN SELECT switch

SYNC indicator

DC 5V connectorMIDI IN jack

USB 2.0 portMIDI OUT jack

S/PDIF OUT jacks

S/PDIF IN jacks

Left side

Back

Part Names (continued)

Connecting with a Computer/iOS device

Do not connect the until installation completes.

Windows

1. Download the ZOOM U-44 Driver from http://www.zoom.co.jp/downloads/ to

your computer.

NOTE

• You can download the latest ZOOM U-44 driver from the above website.

• Download the driver for the operating system that you are using.

2. Launch the installer and install the driver.

Follow the instructions that appear on screen to install the ZOOM U-44 driver.

NOTE

• See the Installation Guide included in the driver package for detailed installation procedures.

Mac

Driver installation is not necessary when using a Mac.

Installing the Driver

Connecting with a Computer/iOS device

Using bus power

Use a USB cable to connect the

to the computer.

<Back>

Using batteries

1. Open the battery cover on the

bottom.

2. Install the batteries.

3. Replace the battery cover.

NOTE

• Use only alkaline alkaline batteries or rechargeable NiMH batteries.

• The power indicator will blink when the battery charge becomes low. Turn the power off immediately and install new

batteries.

Using an external power supply

Connect either the optional AD-17 adapter, a commercially available USB power adapter, or

a mobile USB battery to the DC 5V connector.

<Back>

Choosing a Power Source

Connecting with a Computer/iOS device

1. Minimize the volume of any output devices that are currently connected to the

2. Set to AUDIO INTERFACE.

3. Use a USB cable to connect the

to the computer.

<Back>

4. Set to USB or BATTERY/DC IN to turn the power on.

NOTE

• If is set to AUDIO INTERFACE, the can only be used if it is connected to a computer.

• When using batteries or an external power supply, set to BATTERY/DC IN.

5. Conrm that the power indicator is lit.

Connecting with a Computer

Connecting with a Computer/iOS device

You can connect the to an iOS device when using either the optional AD-17 power

adapter, an external DC power supply, or AA batteries.

1. Minimize the volume of any output devices that are currently connected to the

2. Set to AUDIO INTERFACE.

3. Install batteries or connect an external power supply. (→ P. 7)

4. Connect the

to the iOS device using an Apple iPad Camera Connection Kit

or Lightning to USB Camera Adapter.

<Back>

5. Set to BATTERY/DC IN.

After the

turns on, it will connect to the iOS device.

NOTE

• cannot accept bus power from an iOS device.

6. Conrm that the power indicator is lit.

iOS device Connection

Connecting with a Computer/iOS device

1. Minimize the volume of any output devices that are currently connected to the

2. Turn off amps, monitor speakers, and any other output equipment that is

currently connected to the

3. Set to OFF.

Turning the Power Off

Recording

Instruments can be connected to INPUTS 1 and 2 using TRS or mono instrument cables.

Bass guitar

(TRS cable)

(mono instrument cable)

Keyboard

Guitar

Using the Hi-Z Function

• The Hi-Z function can only be used with INPUT 1.

• When connecting a guitar or bass with passive pickups, use INPUT 1

and turn on (

• When connecting a keyboard or other instrument, connect it to INPUT

1 and turn off (

), or connect it to INPUT 2.

Connecting Instruments

Recording

Connecting Mics

Using Phantom Power

• When using a condenser mic, turn on ( ).

• When on, phantom power is supplied to both INPUTS 1 and 2.

Mics can be connected to INPUTS 1/2 using XLR cables.

Dynamic mic

Condenser mic

(XLR cable)

Connecting Mics

Recording

Adjusting Input Gain

You can adjust the gain of each input.

1. Check the status of the input signal.

Green light: Input signal is present.

Red light: Input signal is clipping.

2. Adjust the input gain.

Turn the .

HINT

• To avoid distorted recordings, adjust the input gain so the level indicator doesn't light up red.

Adjusting Input Gain

Playback

Connecting Headphones and Speakers

Connect headphones to the PHONES jack, speakers to the MAIN OUT jacks, and adjust

the volume levels accordingly.

1. Connect headphones or speakers.

Speakers

Headphones

Adjust the headphones/speakers volume.

Headphones volume:

Turn .

Speakers volume: Turn .

NOTE

• The LINE OUT 1 jacks deliver the same signal output as the MAIN OUT jacks.

• The LINE OUT 2 jacks deliver the same signal output as the PHONES jack.

• The LINE OUT 1 and 2 volume levels can’t be changed.

• The MAIN OUT/LINE OUT 1 jacks deliver output from computer playback signals 1-2.

• The PHONES/LINE OUT 2 jacks deliver output from the adjusted balance of computer playback signals 1-2 and 3-4. (→ P. 17)

Connecting Headphones and Speakers

Playback

Muting Outputs

The outputs of channels A (MAIN OUT/LINE OUT 1) and B (PHONES/LINE OUT 2) can be

muted/unmuted.

1. Press for the channel you want to mute.

Lit: Muted

Unlit: Not muted

Muting Outputs

Playback

Using Direct Monitoring

Direct monitoring enables you to listen to input signals before they pass through the

computer. This allows you to hear the sound coming into the

without latency.

1. Turn to adjust the balance between the

audio input and the computer playback

signals.

Using Direct Monitoring

Playback

The balance between computer playback signals 1-2 and 3-4 can be adjusted for the LINE

OUT 2 and PHONES outputs.

For example, you can balance the PHONES output between click track and MAIN OUT

signals during a live performance. Or you can balance between the cue and MAIN OUT

signals during a DJ performance.

Live performance

Speakers

Headphones

DAW software

MAIN OUT

［1-2］

30％

70％

Click track

［3-4］

DJ performance

DAW software

MAIN OUT

［1-2］

50％

Cue audio

［3-4］

Speakers

Headphones

Turn to adjust the balance between

computer playback signals 1-2 and 3-4.

NOTE

• Computer playback signals 1-2 are output from the MAIN OUT/LINE

OUT 1 jacks.

Adjusting the Computer Playback Signal Balance

Connecting MIDI Devices

Use MIDI cables to connect MIDI devices to the MIDI IN and MIDI OUT jacks.

Sound module

MIDI OUT jack

MIDI IN jack

MIDI keyboard or

MIDI controller

<Back>

NOTE

• When you connect the to a DAW using a MIDI port, follow the instructions below to ensure proper connectivity

and functionality.

Use ZOOM U-44 Driver. Do not use MIDI IN/OUT 2 (ZOOM U-44 Driver).

<Mac>

Use ZOOM U-44 MIDI I/O Port. Do not use ZOOM U-44 Reserved Port.

Connecting MIDI Devices

Using Digital Audio Equipment

About the Digital Audio Clock

When the is connected to other digital audio equipment, the audio clock must be synchronized in order to

accurately transfer audio data. If the devices are not synchronized, unwanted noise and other problems will occur.

To synchronize the audio clock, one device must operate as the master—which sets the reference clock—and the

other must operate as a slave.

Audio clock

Reference

clock

Synchronized

clock

Master

Slave

Digital device

The is operating as the master, and the audio clock of the and the other digital device are

synchronized.

Connecting S/PDIF Devices

1. Minimize the volume of any output devices that are currently connected to the

HINT

• After you connect the device, noise may occur until the audio clock is synchronized.

2. Set the same sampling rates for the

and the connected device.

Follow the procedures below to change the sampling rate.

Open the Control Panel on your computer. Select "Hardware and Sound" and select the desired sample rate

on the ZOOM

Control Panel.

<Mac>

Open the Utilities folder in the Applications folder, double-click the Audio MIDI Setup application, and then

select the

Using Digital Audio Equipment

Inputting an S/PDIF signal

Switch to OPTICAL or COAXIAL to select

the input you want to use.

2. Connect the S/PDIF device to the S/PDIF IN jack set in step 1.

S/PDIF OUT jack

S/PDIF IN jack S/PDIF IN jack

S/PDIF device

(output)

(input)

NOTE

• When a mic capsule is connected to the MIC IN connector, the S/PDIF inputs are disabled.

• The S/PDIF inputs are assigned to INPUT 3/4.

3. Confirm synchronization has occurred by

checking that the SYNC indicator is lit.

NOTE

• To synchronize audio clock, the and the connected device must have the same sampling rate settings.

• The SYNC indicator will blink when a digital audio device is connected to a S/PDIF IN (OPTICAL or COAXIAL) but

synchronization with the digital audio device is not possible. In this case, the will operate using its internal clock.

Check the S/PDIF IN SELECT switch setting.

Using Digital Audio Equipment (continued)

Using Digital Audio Equipment

Outputting a S/PDIF signal

1. Connect the S/PDIF device to the S/PDIF OUT jack.

S/PDIF IN jack

S/PDIF OUT jack

S/PDIF device

(input)

(output)

NOTE

• S/PDIF outputs the same signals as the MAIN OUT and LINE OUT 1 jacks.

HINT

• The S/PDIF IN SELECT switch only affects S/PDIF input. S/PDIF output signals are always delivered from both the

OPTICAL OUT and COAXIAL OUT jacks.

Using Digital Audio Equipment (continued)

Connecting ZOOM H-Series Mic Capsules

A ZOOM H-Series mic capsule can be connected to the MIC IN connector on the front of

the

NOTE

• The mic capsule input is assigned to INPUT 3/4.

• When a mic capsule is connected, the S/PDIF IN (OPTICAL and COAXIAL) jacks cannot be used.

1. Turn the power OFF.

NOTE

• Always turn the power off before connecting a mic capsule. If you connect a mic capsule while the power is on, it will not

be usable.

2. Remove the protective caps from the

and the mic capsule or extension

cable.

Connecting ZOOM H-Series Mic Capsules

Connecting ZOOM H-Series Mic Capsules (continued)

3. Press the buttons on the sides of the mic capsule or extension cable, connect it

to the

MIC IN connector, and insert it completely.

4. To disconnect a mic capsule or extension cable, turn the off. Press the

sides of the capsule or cable and pull it away.

NOTE

• Be careful not to use too much force when disconnecting. You could damage the mic capsule, extension cable, or main

unit.

• Attach the protective cap when a mic capsule or extension cable is not in use.

• With the MSH-6 and SSH-6, audio data is recorded in RAW format. Since the RAW data format is different from that used

by ordinary stereo les, the stereo width must be adjusted and the data must be converted to an ordinary stereo le after

recording by using ZOOM MS Decoder or other plug-in software.

• The SGH-6 is a mono mic.

HINT

• ZOOM H-Series Mic Capsules and Extension Cables

XYH-6 Adjustable Stereo X/Y Microphone Capsule

XYH-5 Shock Mounted Stereo X/Y Microphone Capsule

MSH-6 Mid-Side Microphone Capsule

SGH-6 Shotgun Microphone Capsule

SSH-6 Mid-Side Stereo Shotgun Microphone Capsule

EXH-6 Dual XLR/TRS Input Capsule

ECM-3 The three-meter-long extension cable for ZOOM's Mic Capsule options.

ECM-6 The six-meter-long extension cable for ZOOM's Mic Capsule options.

Using as a Standalone AD/DA Converter and Mic Preamp

1. Minimize the volume of output devices connected to the .

2. Supply power. (

→

P. 7)

3. Use to set the sampling rate.

INTERNAL: Function using 44.1 or 48 kHz sampling rate.

(Master)

S/PDIF: Use the sampling rate of the signal input through the

OPTICAL IN or COAXIAL IN.

(Slave)

4. Turn the

on using the power supplied in

step

5. Conrm that the power indicator is lit.

NOTE

• See P. 27 for the signal ow diagram when using standalone AD/DA mode.

• The sampling rate cannot be changed using after start up.

Using as a Standalone AD/DA Converter and Mic Preamp

(Standalone Mode)

Troubleshooting

Cannot select or use the device

• Confirm that the

is connected to the

computer correctly.

• Quit all the software that is using the

and disconnect and reconnect the USB cable

connected to the

• Reinstall the driver.

• Connect the

directly to a USB port on the

computer. Do not connect it to a USB hub.

• Set OPERATION MODE to AUDIO INTERFACE.

(

→

P. 8)

Playback sound cannot be heard or is quiet

• Check the speaker connections and volume

settings on the speakers.

• Adjust the OUTPUT and PHONES volume

controls.

• Conrm that the Sound setting of the computer

that you are using is set to "ZOOM U-44".

• Adjust the DIRECT MONITOR knob.

• If no sound can be heard or the volume is low

from the PHONES/LINE OUT 2 outputs, adjust

the BALANCE knob.

Recorded audio is too loud, too quiet or silent

• Adjust the input gain of the .

• When using a condenser mic, turn phantom

power on.

• Confirm that the Sound setting of the

computer that you are using is set to "ZOOM

U-44".

The sound of the device connected to the

input jack is distorted

• Conrm that the level indicators are not lighting

red. If they are, lower the input levels.

Sound skips during playback or recording

• If you can adjust the audio buffer size of the

software that you are using, increase the buffer

size.

• Turn the automatic sleep function and other

computer power saving settings OFF.

• Connect the directly to a USB port on the

computer. Do not connect it to a USB hub.

Cannot play or record

• Conrm that the Sound setting of the computer

that you are using is set to "ZOOM U-44".

• Confirm that

is set for input and output

in the software you are using.

• Confirm that

is connected to the

computer correctly.

• Quit all software that is using the

, then

disconnect and reconnect the

’s USB

cable.

Cannot use with an iOS device

• Set OPERATION MODE to AUDIO INTERFACE.

(

→

P. 8)

• Confirm that the batteries are loaded or the

external power supply is connected correctly.

(

→

P. 7)

• Set the POWER switch to BATTERY/DC IN to

turn the power on.

Sound skips during digital input or output

• Confirm that the device used for audio clock

synchronization is connected correctly.

• If the

is the master, confirm that audio

clock is synchronized on the connected device.

• If the

is a slave, conrm that the correct

clock source and sampling rate are selected

and that the SYNC indicator is lit.

Cannot use in standalone AD/DA mode

• Set the OPERATION MODE to STAND ALONE

and select the correct clock source before

turning the power on.

Troubleshooting

Specications

ANALOG IN INPUT 1/2 Connector TRS/XLR combo jacks

(XLR: 2 hot, TRS: TIP hot)

Input gain 0 – 43 dB

Input impedance 2.6 kΩ (MIC IN)

1.1 MΩ (when Hi-Z ON)

Maximum input level +2.7 dBu (MIC IN) /+20.7 dBu (TRS IN)

Phantom power +48 V

MIC IN Supported mics XYH-6, MSH-6, SGH-6, EXH-6, SSH-6, XYH-5

ANALOG OUT MAIN OUT L/R Connector TRS phone jacks (unbalanced)

Maximum output level +10 dBu (at 0 dBFS)

Output impedance 330 Ω

LINE OUT 1/2 Connector RCA (coaxial)

Maximum output level +8 dBu (at 0 dBFS)

Output impedance 1 kΩ

PNONES Connector Standard stereo phone jack

30 mW x 2 (into 32 Ω load)

Maximum output level +10 dBu (at 0 dBFS)

Output impedance 33 Ω

DIGITAL IN/

OUT

S/PDIF

OPTICAL

Connector TOSLINK

Supported sampling

frequencies

96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz

S/PDIF

COAXIAL

Connector RCA (coaxial)

Supported sampling

frequencies

96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz

Frequency characteristics At 44.1 kHz: ±1.5 dB: 20 Hz - 20 kHz

At 96 kHz: ±2 dB: 20 Hz - 40 kHz

Input conversion noise Measured EIN: -119.5 dB (IHF-A)

(with 43 dB, 150 Ω input)

Number of audio recording and playback channels Recording: 4 channels

Playback: 4 channels

Sampling frequencies 96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz

Bit depth 24-bit

Interface USB2.0

MIDI IN/OUT 5 pin DIN jack

Power Source USB bus power (Type B)/ZOOM AD-17 (Micro-B)/DC 5 V power supply

(Micro-B)/2 AA batteries (about 4 hours continuous operation with

phantom power off)

Power consumption 5 W maximum

Dimensions 198.8 mm (D) × 92.3 mm (W) × 42.7 mm (H)

Weight (main unit only) 310 g

* 0 dBu = 0.775 Vrms

Note: The continuous operation time with batteries is just an estimate. This result is from in-house testing methods. The actual time will vary greatly

according to operating conditions.

Specications

Signal Flow Diagrams

AUDIO INTERFACE mode signal ow diagram

Standalone AD/DA mode signal ow diagram

A B

Hi-Z/

Lo-Z

Gain

To Computer

From Computer

48V

INPUT2

INPUT1

LEVEL

INDICATOR

OPTICAL OUT

LINE OUT 1 L

LINE OUT 1 R

PHONES

LINE OUT 2 L

LINE OUT 2 R

COAXIAL OUT

MAIN OUT L

MAIN OUT R

MUTE

SWITCH A

MUTE

SWITCH B

BALANCE

MAIN OUT

VOLUME

PHONES

VOLUME

INPUT1

INPUT2

INPUT3

INPUT4

INPUT OUTPUT OUTPUT

DIRECT

MONITOR

1 2 3 4

S/PDIF IN

SELECT SWITCH

COAXIAL IN

OPTICAL IN

MIC IN

INPUT1

-6dB -6dB

-6dB

INPUT2

INPUT3

INPUT4

OPTICAL OUT

LINE OUT 1 L

LINE OUT 1 R

PHONES

LINE OUT 2 L

LINE OUT 2 R

COAXIAL OUT

MAIN OUT L

MAIN OUT R

COAXIAL IN

OPTICAL IN

MIC IN

S/PDIF IN

SELECT SWITCH

Hi-Z/

Lo-Z

Gain

48V

LEVEL

INDICATOR

OUTPUT

1 2 3 4

MAIN OUT

VOLUME

PHONES

VOLUME

A B

MUTE

SWITCH A

MUTE

SWITCH B

Z2I-2572-04

ZOOM CORPORATION

4-4-3 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062 Japan

http://www.zoom.co.jp

Zoom U-44 Portable 4x4 USB Handy Audio/MIDI Interface

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User Manual

Specifications

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