Operation Manual © 2016 ZOOM CORPORATION Copying or reprinting this manual in part or in whole without permission is prohibited.
Contents Introduction Introduction…………………………………………… 2 Playback……………………………………………… 14 Safety and Usage Precautions…………………… 3 Connecting MIDI Devices…………………………… 18 Part Names…………………………………………… 4 Troubleshooting……………………………………… 19 Connecting with a Computer/iOS device………… 6 Specifications………………………………………… 20 Recording……………………………………………… 11 Signal Flow Diagrams……………………………… 21 Introduction Thank you for choosing the ZOOM Handy Audio Interface.
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.
Part Names Part Names Top MAIN OUT jacks LINE OUT 1 jacks INPUT 1 jack Hi-Z switch Level indicators LINE OUT 2 jacks PHANTOM switch PHONES jack GAIN knobs BALANCE knob INPUT 2 jack MAIN OUT knob PHONES knob DIRECT MONITOR knob MUTE switches Power indicator XLR 2 3 TRS 1 TIP: HOT 1: GND 2: HOT 3: COLD RING: COLD SLEEVE: GND 4
Part Names (continued) Part Names Left side POWER switch Back MIDI OUT jack USB 2.
Connecting with a Computer/iOS device Installing the Driver Do not connect the until installation completes. Windows 1. Download the ZOOM U-24 Driver from http://www.zoom.co.jp/downloads/ to your computer. NOTE Installing the Driver • You can download the latest ZOOM U-24 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-24 driver.
Using bus power Use a USB cable to connect the to the computer. 1. Open the battery cover on the 2. Install the batteries. 3. Replace the battery cover. bottom. NOTE • Use only 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.
Connecting with a Computer/iOS device Connecting with a Computer 1. Minimize the volume of any output devices that are currently connected to the . 2. Use a USB cable to connect the to the computer. Connecting with a Computer 3. Set to USB or BATTERY/DC IN to turn the power on. NOTE • When using batteries or an external power supply, set 4. Confirm that the power indicator is lit. 8 to BATTERY/DC IN.
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 . Install batteries or connect an external power supply. (→ P. 7) 3. Connect the and the iOS device using an Apple iPad Camera Connection Kit or Lightning to USB Camera Adapter. 4. Set to BATTERY/DC IN. After the turns on, it will connect to the iOS device.
Connecting with a Computer/iOS device Turning the Power Off 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 Turning the Power Off 3. Set . to OFF.
Connecting Instruments Guitar Bass guitar Keyboard (TRS cable) 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 on ( ). • When connecting a keyboard or other instrument, connect it to INPUT 1 and turn off ( ), or connect it to INPUT 2. 11 Connecting Instruments (mono instrument cable) and turn Recording Instruments can be connected to INPUTS 1/2 using TRS or mono instrument cables.
Connecting Mics Recording Mics can be connected to INPUTS 1/2 using XLR cables. Connecting Mics Dynamic mic (XLR cable) Condenser mic (XLR cable) Using Phantom Power • When using a condenser mic, turn on ( ). • When on, phantom power is supplied to both INPUTS 1 and 2.
Adjusting Input Gain Recording 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. Adjusting Input Gain 2. Adjust the input gain. Turn the . HINT • To avoid distorted audio, adjust the input gain so the level indicator doesn't light up red.
Connecting Headphones and Speakers Playback Connect headphones to the PHONES jack, speakers to the MAIN OUT jacks, and adjust the volume levels accordingly. 1. Connect headphones or speakers. Connecting Headphones and Speakers Speakers Headphones 2. 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.
Muting Outputs 1. Press Playback The outputs of channels A (MAIN OUT/LINE OUT 1) and B (PHONES/LINE OUT 2) can be muted/unmuted. for the channel you want to mute.
Using Direct Monitoring Playback 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.
Adjusting the Computer Playback Signal Balance 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.
Connecting MIDI Devices Connecting MIDI Devices Use MIDI cables to connect MIDI devices to the MIDI IN and MIDI OUT jacks. MIDI OUT jack MIDI IN jack Sound module MIDI IN jack MIDI keyboard or MIDI controller MIDI OUT jack 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-24 Driver. Do not use MIDI IN/OUT 2 (ZOOM U-24 Driver). Use ZOOM U-24 MIDI I/O Port.
Cannot select or use the • Confirm that the device Sound skips during playback or recording is connected to the • If you can adjust the audio buffer size of the computer correctly. software that you are using, increase the buffer • Quit all the software that is using the size. , and disconnect and reconnect the USB cable connected to the • Turn the automatic sleep function and other . computer power saving settings OFF. • Reinstall the driver.
Specifications Specifications ANALOG IN ANALOG OUT INPUT 1/2 MAIN OUT L/R LINE OUT 1/2 PNONES 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.
Signal Flow Diagrams Signal Flow Diagrams 48V DIRECT MONITOR LEVEL INDICATOR INPUT1 Hi-Z/ Lo-Z Gain INPUT 1 2 OUTPUT 1 2 3 4 OUTPUT 1 2 3 4 INPUT1 AD Gain INPUT2 INPUT2 INPUT1 -6dB INPUT2 -6dB MAIN OUT VOLUME MAIN OUT L DA From Computer A To Computer MAIN OUT R MUTE SWITCH A LINE OUT 1 L LINE OUT 1 R PHONES VOLUME DA 21 B MUTE SWITCH B BALANCE PHONES LINE OUT 2 L LINE OUT 2 R
MEMO
ZOOM CORPORATION 4-4-3 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062 Japan http://www.zoom.co.
