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DigiDesign 888/24 I/O User Manual

DigiDesign 888/24 I/O
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Digidesign Inc.
3401-A Hillview Avenue
Palo Alto, CA 94304 USA
tel: 650·842·7900
fax: 650·842·7999
Technical Support (USA)
650·842·6699
650·856·4275
Product Information
650·842·6602
800·333·2137
Fax on Demand
1-888-USE-DIGI (873-3444)
World Wide Web
www.digidesign.com
Digidesign FTP Site
ftp.digidesign.com
Digidesign
888|24 I/O Audio Interface
Installation Guide
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DigiDesign 888/24 I/O Specifications

General IconGeneral
Audio Channels8 in / 8 out
Bit Depth24-bit
Simultaneous I/O8 in / 8 out
Clock I/OWord Clock
Input TypeAnalog
Output TypeAnalog
Sample RateUp to 48 kHz
Converter TypeA/D and D/A
Analog I/O8 channels

Summary

Using the 888/24 I/O

The 888/24 I/O Interface

Explains the connectors and indicators on the 888/24 I/O.

888/24 I/O Front Panel

Details the indicators and controls on the front panel of the 888/24 I/O.

Sample Rate and 1–2 Format Indicators

Indicates the sample rate and digital format of audio inputs.

Level Meters

Monitors channel outputs and indicates clipping of Pro Tools output signals.

Input Level Trims

Allows adjustment of analog input levels to match external equipment.

Output Level Trims

Allows adjustment of analog output levels to match external equipment.

888/24 I/O Back Panel

Analog Audio Outputs

Balanced male XLR connectors for analog audio output connections.

Analog Audio Inputs

Balanced female XLR connectors for analog audio input connections.

AES/EBU Digital Outputs 1–8

Balanced XLR connectors outputting a 24-bit digital data stream.

AES/EBU Digital Inputs 1–8

Balanced XLR connectors accepting a 24-bit digital data stream.

50-pin Interface Connector

Connects the 888/24 I/O to MIX, d24, Disk I/O, or DSP Farm cards.

S/PDIF Digital Input/Output

Unbalanced RCA jacks for S/PDIF digital audio transfers.

Slave Clock In/Out

BNC connectors for slaving and synchronizing multiple Digidesign interfaces.

Power Input

Connector for standard AC power cable, auto power-selecting.

Changing Operating Levels of Individual 888/24 I/O Channels

Making Signal Connections to the 888/24 I/O

Choosing between +4 dBu and -10 dBV operation modes

Determining appropriate line level mode for studio compatibility.

Setting Up Your Studio

Using the 888/24 I/O Interface as Stand-Alone Audio Converter

Changing the Default Sample Rate of the 888/24 I/O in A/D Stand-Alone Mode

Changing the Default Word Clock Lock Port of the 888/24 I/O in D/A Stand-Alone Mode

Muting the DAC Outputs of the 888/24 I/O in A/D Stand-Alone Mode

Appendix A: Technical Specifications

General

Provides general details on analog and digital I/O, sample rates, and clock reference.

A/D Specifications

Details specifications for Analog-to-Digital conversion, including SNR and THD.

D/A Specifications

Details specifications for Digital-to-Analog conversion, including SNR and THD.

Physical Specifications

Covers power requirements, weight, and dimensions of the device.

Appendix B: Calibrating the 888/24 I/O (Pro Tools 5.0)

About Calibration

Explains the difference between analog and digital calibration.

Headroom

Discusses the concept of headroom for analog and digital devices.

The Calibration Process

Details the steps for calibrating input and output levels using Pro Tools.

Calibrating The 888/24 I/O

Provides step-by-step instructions for calibrating the 888/24 I/O.

Calibrating a System With Both 888/24 I/O and 882/20 I/O Audio Interfaces

Guidance for calibrating systems with mixed Digidesign interfaces.

Appendix C: Calibrating the 888/24 I/O (Pro Tools 4.x)

About Calibration

Explains the difference between analog and digital calibration.

Headroom

Discusses the concept of headroom for analog and digital devices.

The Calibration Process

Details the steps for calibrating input and output levels using Calibration Tool.

Calibrating The 888/24 I/O

Provides instructions for calibrating the 888/24 I/O with Calibration Tool.

Using an External Tone Generator

Procedure for calibrating using an external sine wave generator.

Using a VU meter

Procedure for calibrating using a VU meter.

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