Art USBMix4 Manuel utilisateur

USBMIX4

FOUR CHANNEL MIXER WITH USB INTERFACE

Project Series

User's Manual

IMPORTANT SAFETY INSTRUCTIONS - READ FIRST

This symbol, wherever it appears, This symbol, wherever it appears, alerts you

alerts you to the presence of uninsulated to important operating and maintenance

dangerous voltages inside the enclosure that instructions in the accompanying literature.

may be sufficient to constitute a risk of shock. Please read the manual.

Read instructions

Retain these safety and operating instructions for future reference. Heed all warnings printed here and on the

equipment. Follow the operating instructions printed in this user guide.

Do not open

There are no user serviceable parts inside. Refer any service work to qualified technical personnel only.

Power sources

Only connect the unit to mains power of the type described in this user guide or marked on the rear panel. The

power source must provide a good ground connection.

Power supply

Use the external power supply for your local mains supply as provided with the equipment. If the provided

external supply does not fit into you outlet consult your service agent. Route the external power cord so that it

is not likely to be walked on, stretched or pinched by items placed upon or against.

Grounding

Do not defeat the grounding and polarization means of the external power supply.

Moisture

To reduce the risk of fire or electrical shock, do not expose the unit to rain, moisture or use in damp or wet

conditions. Do not place container of liquid on it, which may spill into any openings

Heat

Do not locate the unit in a place close to excessive heat or direct sunlight, as this could be a fire hazard.

Locate the unit away from any equipment, which produces heat such as: power supplies, power amplifiers and

heaters.

Environment

Protect from excessive dirt, dust, heat, and vibration when operating and storing. Avoid tobacco ash, drink

spillage and smoke especially that associated with smoke machines.

Handling

Protect the controls from damage during transit. Use adequate padding if you need to ship the unit. To avoid

injury to yourself or damage to the equipment take care when lifting, moving or carrying the unit.

Servicing

Switch off the equipment and unplug the power cord immediately if it is exposed to moisture, spilled liquid or

the power cord or plug becomes damaged during a lightning storm or if smoke odor or noise is noted. Refer

servicing to qualified technical personnel only.

Installation

Install the unit in accordance with the instruction printed in the user manual.

INTRODUCTION

The ART USBMIX4 Microphone, Instrument, and Line Mixer/Computer Interface is a compact

versatile audio interface for your computer that converts analog signals from a variety of audio

sources to a digital signal that your computer recognizes. It can also be used as a stand-alone mixer

through the main mix outputs. The USBMIX4 provides a great starting point for personal home studio

recording or for anyone wants to do mobile location recording. Use the USBMIX4 to record pod casts,

capture your latest idea for a song, make voiceovers for your home movies, or record a jam with a

friend - whenever and wherever your creativity takes you!

Features

•

CH1 and 2 Microphone (balanced XLR) inputs or instrument (unbalanced ¼-inch TS) inputs with

switchable impedances

•

Switchable low noise +48V phantom power for microphones

•

Balanced ¼-inch TRS inputs for stereo or mono line-level sources on CH3

•

¼-inch TRS output jacks work with balanced or unbalanced lines

•

⅛-inch TRS stereo Aux/MP3 input

•

Stereo output, independent from the PC interface switch

•

Stereo ¼-inch TRS headphone jack with independent level control for output monitoring

•

Independent controls for both sets of inputs, main output, and headphone monitor

•

Red LED signal/clip indicator for Ch1-2

•

No special drivers are needed with most modern versions of Windows or Mac OS and Linux

•

USB cable, USB power adaptor and Audacity recording software included

•

Rugged steel chassis

INSTALLATION

Prior to power up or power down, the output controls PHONES MONITOR and MAIN MIX should be

turned back to “0”.

1. As audio sources, microphones and/or audio sources with line signal level (e.g. effect units,

musical instruments, players) can be connected to the four input channels.

2. Mono channels CH1 and CH2:

3. Combined XLR/¼-inch jack are available as inputs

4. Connect microphones to the balanced XLR jack.

5. For phantom-powered microphones, you must engage the 48V phantom power switch for channel

CH-1 XLR jack. When the switch is engaged, (switch position =on) the Phantom power -LED

is illuminated to indicate that Phantom power is being used.

Caution! Do not connect a microphone with unbalanced output via XLR plug; it may be damaged by

the phantom power function. To prevent switching noise, only activate or deactivate the phantom

power when the mixer is switched off or the output controls are set to “0”.

6. Connect mono sources with the line level to the unbalanced 1/4-inch jacks. It is also possible to

directly -connect musical instruments of high impedances (electric guitar, electric bass) to Stereo

channels CH3/4.

7. Stereo sources with a line level may be connected to the ¼-inch jack of channel CH3/4, (L=left

channel, R= right channel). The jacks of channel CH3/4 are balanced, however, it is also possible

to connect units with unbalanced output via two-pole plugs. For connecting a mono unit to channel

CH3/4, use Left jack only: Then the mono signal is internally sent to the left channel and the right

channel.

8. Connect stereo headphones (impedance ≥8 OHM) to the ¼-inch jack PHONES MONITOR or the

⅛-inch jack HEADSET headphone output jack.

9. The sum signal adjusted with the control MAIN MIX is present at the stereo output MAIN MIX OUT.

10.Here example, an amplifier or a second mixer may be connected. The ¼-inch jacks are

unbalanced.

11.To switch on the mixer, set the POWER switch to position

. The power indication POWER

lights up.

CONTROLS AND INDICATORS

USB jack (type B): For connecting to a computer using the included USB 2.0 cable. When connected

to a computer, the computer supplies power to the mixer and audio data can be sent between the

mixer and computer.

Note: Please do not connect any device to this USB jack other than a personal computer or

tablet devices.

5V DC IN jack (type micro B): For connecting to a USB power adapter or USB mobile battery.

Note:

1. Please read the safety precautions for the USB power adapter or USB mobile battery you are

using.

2. Use a USB power adapter or USB mobile battery that can supply power via a USB micro B plug

based the following USB standards:

Output voltage: 4.5 V to 5.2V

Output current: 500mA or greater

Combo input (combined jack XLR, balanced / ¼-inch jack) for channel CH 1, for the connection of a

microphone via an XLR plug or an audio source with line signal level via a 1/4-inch plug.

Mono input (combined jack XLR, balanced / ¼-inch jack unbalanced) for channel CH 2 for the

connection of a microphone via an XLR plug or an audio source with line signal level via a Phone

plug.

+48V phantom switch [+48V] Led: When this switch is turn on , the [+48V]lights and DC +48V

phantom power is supplied to the XLR plug connected to the channel 1, Turn this switch on when

using a phantom-powered condenser microphone.

Note: Be sure to leave this switch off if you do not need phantom power. Follow the important

precautions below, in order to prevent noise and possible damage to external devices as well as the

mixer if you turn this switch on

1. Be sure to leave this switch off when you connect a device that does not support phantom

power to channel 1.

2. Make sure to turn this switch off when connecting / disconnecting a cable to / from channel

3. Turn the level knob of the channel 1 to “0” (minimum) before turning this switch on / off

PAD switches: Turning the switch on will attenuate the sound input to the unit. If you hear

distortion or the [CLIP]Led lights frequently even if the [GAIN] pot is turned fully to the left, turn this

switch on.

Note: Turn the level pot to minimum before toggling the [PAD] switch on and off . Otherwise,

noise may be produced.

Impedance switch For channel CH 2: press the button when an electric guitar or an electric bass

with passive audio pick-up has been connected to the jack ¼-inch.

Stereo input (¼-inch jack, balanced) for channel CH 3 - Ch 4 for connection of an audio source with

line signal level; when connection a mono source, use the left jack only.

Gain switch Determines the basic volume for each channel 3/4. Turn this switch on if you hear

distortion.

Note: Turn the level knob to minimum before toggling the [GAIN] switch on and off

Otherwise, noise may be produced.

Stereo output (Phone jack, unbalanced) for connection of an amplifier or another unit, e.g. a second

mixer.

Stereo output: Used to connect to another mixer or recorder. The signal output from this jack is not

affected by the [TO PC] slide switch or the MAIN MIX [ ] knob.

Phone/Monitor Output (¼-inch jack) for connection of stereo headphones (minimum impedance 8Ω)

for monitoring the sum signal [independent of the PHONES/MONITOR control.

Gain Control To adjust the input amplification, for channel CH 1 and channel CH 2.

Equalizer To adjust the high frequencies "HIGH" and low frequencies "LOW", for each of the input

channels CH1 and CH2.

Pan Control For channels CH1 and CH2, to send the mono signal in, creating a stereo field.

Level Peak Indication, for channel CH1 and CH2.

Level Control For channels CH1 and CH2.

HEADSET Connection for the MIC and PHONES.

Headset microphone input jack: For connecting to the microphone for your headset. The

audio input here is sent to channel 1.

Note: If a microphone is connected to the [HEADSET] microphone input jack, the sound from the

microphone or instrument connected to the CH-1 input jack on channel 1 is cut off.

Headset headphones output jack: For connecting to the headphone for you headset. The same

sound as for the headphone output jack is output.

Note: If a headphone plug is connected to the [HEADSET] headphones output jack, the sound

output from the headphones output jack is cut off.

AUX/MP3 input Jack (⅛-inch jack): This is an auxiliary input jack. It supports a stereo plug. You can

connect a smart phone, MP3 player or other device and use applications to trigger sound effects or

background music. Use the controls on the connected device to adjust volume.

TO PC slide switch Select the audio to send to the computer

[DRY CH 1-2]: This switch enables the audio to be sent from channel 1 and 2 directly to the computer.

The audio levels sent to the computer from CH1 and CH2 can be adjusted by the Gain and Level pots

for those channels. The audio is routed to channels 1 and 2 (guitar and vocal, etc.) can be recorded

separately, as with an audio interface.

[INPUT MIX]: The audio input into the mixer and is mixed in stereo, is then sent to the computer.

The Audio input from the computer is not sent back to the computer.

[LOOPBACK]: The audio input is routed to the mixer and the audio played on the computer is mixed

in stereo and then sent to the computer. This setting is used primarily for web casting.

Note: To prevent feedback when using audio recording/playback software, use either [DRY CH 1-2]

or [INPUT MIX]

Level control for channel CH3-4

Level control for USB playback.

POWER switch of the mixer.

POWER ON indication.

USB recording level meter If the level of the audio sent to the computer exceeds -20dBV, the green

led light up; If the level reaches 3dB before clip level, the red led light up. To send an appropriate

audio level to the computer, adjust the audio level of each channel until the green led remains lit and

the red led flashes only momentarily when there is an extreme audio level present.

Monitor Mute switch When this switch is on , the audio input to channels 1 and 2 are muted from

the MAIN MIX [ ] output jack, the HEADSET output jack, and PHONES output jack (direct

monitoring is OFF).

Level control PHONES MONITOR For the headphone output PHONES MONITOR and [HEADSET]

headphones output jack.

MAIN MIX control Allows you to set the level of the output signal sent via the outputs MAIN MIX,

AUX out and the USB port.

OPERATION WITH A COMPUTER

1. When operating the mixer with a computer, either use the audio software supplied with the

operating system or audio software installed additionally. Various programs for audio

reproduction/ recording are available on the Internet free of charge.

2. Boot up the computer and connect the USB jack to a USB port at the computer via the USB cable

provided. The USB interface of the mixer is recognized by the computer as an external unit for

audio input and audio output, depending on the operating system e.g. as “USB Audio CODEC”.

The required drivers (standard drivers of the operating system) are available on the computer.

Note: If not all drivers required are available on the computer, install them, e.g. via the original CD of

the operating system. If necessary, restart the computer after installation.

3. Activate the audio program used and make the necessary adjustments for the audio reproduction

via the mixer or audio recording from the mixer.

4. If no audio recording or audio reproduction is possible, check in the system settings of the

computer if the USB interface has been selected for the audio input or audio output.

Hint: If the mixer is connected both to a computer and to any units, which are earth, grounded via

their mains cables (e.g. amplifiers), ground loops may occur due to hum interference. To eliminate

them, the mixer can be connected to the respective unit via a ground isolator.

MIXING AUDIO SOURCES

The following steps merely serve as an aid, for basic setup, other methods are also possible.

As a basic setting first:

1. Set all controls GAIN, EQ and PAN to mid-position.

2. Turn all control LEVEL back to the left stop.

3. To adjust a mono channel to an optimum level, feed an audio signal to the channel and turn up its

control LEVEL approximately to mid-position. Adjust the control GAIN of the channel so that the

clip light activates on peak levels. Then adjust the sound with the controls EQ: High for the high

frequencies, LOW for low the bass frequencies. As the sound adjustments affect the channel level,

readjust the gain adjustment, if necessary.

4. Then turn the control LEVEL back to the stop and make the same adjustments for the second

mono channel.

5. For the sound adjustment of a stereo channel turn the controls LEVEL of the remaining channels

back to the stop and turn up the control LEVEL of the stereo channel so that the sound can be

optimized.

6. For the mono channels place the mono signals in the stereo sound with the PAN controls.

7. Adjust the desired overall volume with the control MAIN MIX. However, if the output level of the

mixer is too high for the following unit, the sum signal must be adjusted to a correspondingly lower

level.

Ce manuel convient aux modèles suivants

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