Specifications

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The ART

DI/O

TABLE OF CONTENTS

Introduction ......................................................................................... 2

Installation ........................................................................................... 3

AC Power Hookup ............................................................................. 3

Audio Connections ............................................................................ 3

Safety Precautions ............................................................................ 3

Controls and Indicators .......................................................................4

Input Gain Control ............................................................................. 4

Sample Rate Switch .......................................................................... 4

Sample Rate LED Indicators ............................................................. 5

Signal Level LED Indicators ............................................................... 5

Tube Warmth Control ........................................................................ 6

Power LED Indicator ......................................................................... 6

Connections ........................................................................................ 7

¼” Input Jacks.................................................................................... 8

¼” Output Jacks ................................................................................ 8

S/PDIF Output Jack ........................................................................... 8

S/PDIF Input Jack ............................................................................. 8

Power Jack ....................................................................................... 9

Operation ........................................................................................... 10

Warranty Information ........................................................................ 14

Service ............................................................................................... 15

DI/O Specifications ............................................................................ 16

Summary of content (16 pages)

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The ART DI/O TABLE OF CONTENTS Introduction ......................................................................................... 2 Installation ........................................................................................... AC Power Hookup ............................................................................. Audio Connections ............................................................................ Safety Precautions ...............................................................
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INTRODUCTION Designed to help ease the high-resolution stereo 24-bit from 44.1 to 96kHz. In synchronization allows for 22kHz to 100kHz. transition to the digital world, the DI/O offers A/D-D/A conversion at switchable sample rates external sync mode, the DI/O’s intelligent automatic sync to outboard equipment from The DI/O can be used in a wide variety of applications including recording, project, and home studios.
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INSTALLATION The DI/O may be used in a wide variety of applications and environments. Self-contained in an all-steel enclosure, the DI/O is designed for continuous professional use. Because the unit is compact and lightweight, mounting location is not critical. However, for greater reliability we recommend that you not place the DI/O on top of power amps or other sources of heat. The tube circuitry needs about a minute to “warm up” from a cold power up.
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CONTROLS & INDICATORS INPUT GAIN CONTROL The Input Gain control allows you to add gain to the input signal before the tube and A/D converter. Turn the control clockwise to increase gain and counterclockwise to decrease gain. At the fully counterclockwise position (0dB), incoming signals are passed at unity gain to the A/D converter. At this setting the inputs can handle “hot” signals, up to +20dBu, before clipping the A/D.
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SAMPLE RATE LED INDICATORS The Sample Rate LED Indicators show the current sample rate that the DI/O’s A/D and D/A are operating at. When set to one of the internally generated sample rates (44.1, 48, 88.2, or 96kHz), the DI/O provides the Master clock source from its internal crystal clock. When set to the External Sync position, the DI/O will use the S/PDIF In jack as the source of its Master clock. It will synchronize to, and track, sample rates from 22kHz to 100kHz. The green (Ext.
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TUBE WARMTH CONTROL This control allows you to vary the tube circuits warmth contribution to the audio signal chain. At the Clean end, there is essentially no tube processing and the yellow Warm LED should not light. As you turn up the control, the drive to the tube is increased while its output is adjusted, to maintain a fairly constant output signal to the A/D. At higher signal levels you will see the yellow (Warm) LED start to come on, indicating that the tube circuit is doing some of the processing.
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CONNECTIONS variety of equipment. All inputs and outputs are located on the rear panel. Standard ¼” audio inputs and outputs make patching simple.
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¼” INPUT JACKS The ¼” Input jacks are for instrument and line level signals. They have a high input impedance to minimize any loading effects on instrument pickups. They can also handle up to +20 dBu signals for line level signal sources. If nothing is plugged into the Input jacks, they automatically switch to get their signal from the ¼” Output jacks. This allows you to loop the digital signal thru the DI/O. In this configuration you only need S/PDIF in and out connections.
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POWER JACK An external 9 Volt AC adapter powers the DI/O. Plug the adapter into the PWR jack and then into a power outlet. Only use the adapter that comes with the DI/O. If the adapter ever becomes damaged, immediately discontinue use. They can be purchased locally or directly from ART. Just make sure that you specify 9 Volt AC output (not DC), at 800 ma.
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OPERATION The main function of the DI/O is to provide a high-quality alternative to the digital audio converters of your computer’s soundcard. Simply plug the analog output from your instrument, mixer, or preamp into the DI/O’s 1/4” Inputs and connect the DI/O’s S/PDIF Output to your soundcard. Next, decide whether your DI/O or soundcard will provide the digital clock source.
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The DI/O contains tube circuitry that can be used to warm-up digital recordings. The amount of tube warmth is increased by turning the DI/O’s Tube Warmth knob clockwise. This control lets you increase the amount of tube drive without increasing the DI/O’s output level. You can add warmth to any sound without having to readjust the levels going through the DI/O.
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USING BOTH ANALOG INS AND OUTS The DI/O also can be used on completely analog signal paths. For example, during a live performance, the DI/O can sweeten up the harsh sound of some keyboards and synthesizers. Simply use the 1/4” Input and Output jacks to insert the DI/O between your keyboards and amplifiers. Use a single RCA cable to loop the DI/O’s S/PDIF In to its S/PDIF Out.
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They may sound better, they may sound worse. The choice is yours. Please realize that unauthorized alterations to the DI/O will result in voiding the warranty. For more application ideas, information, and suggestions on complementary equipment that can be used with the DI/O, visit our website at: http://www.artproaudio.
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WARRANTY INFORMATION Limited Warranty Applied Research and Technology will provide warranty and service for this unit in accordance with the following warrants: Applied Research and Technology, (A R T) warrants to the original purchaser that this product and the components thereof will be free from defects in workmanship and materials for a period of three years from the date of purchase.
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SERVICE The following information is provided in the unlikely event that your unit requires service. 1) Be sure that the unit is the cause of the problem. Check to make sure the unit has power supplied, all cables are connected correctly, and the cables themselves are in working condition. 2) If you find the unit to be at fault, write down a complete description of the problem, including how and when the problem occurs. Please write down a description of your complete setup before calling Customer Service.
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DI/O SPECIFICATIONS A/D – D/A Converter Sample Rate External Sync Range Digital Interface Dimensions Weight Frequency Response Dynamic Range (D/A) Maximum Input Gain Maximum Input Level Maximum Output Level Input Impedance Output Impedance Tube Type Power Requirements 24-Bit, 96kHz, 128x oversampling 44.1, 48, 88.2, 96kHz switch selectable 22kHz to 100kHz S/PDIF Coaxial, In and Out, RCA jacks 5.25”D x 5.375” W x 2.0”H 1.5 lbs. 10Hz to 30kHz, +/-.5dB 108 dB (A-wtd.