External Connection Jacks; Software; Microsoft Windows Nt Workstation Operating System; Digital Unix Operating System - Digital Equipment AlphaStation 500 Series User Information

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Sound Card Overview

External Connection Jacks

The rear-panel jacks are standard 3.5-mm stereo jacks.

Plugging a headphone into the headphone jack disables the speaker. You can plug a pair

of speakers into the headphone jack. (Amplified speakers are recommended.)

The microphone jack is for an electret microphone (2.2 Kohm to 2.5V).

You may use line-in and line-out jacks to connect receivers, amplifiers, or other audio

equipment.

Before applications can use your sound card, the card must be known to your operating

system. Each operating system has a unique way of learning about the card. The

following section explain how to get this process underway for each operating system.

To make the sound card available to Windows NT application, you must install and set up

the driver, as the following steps describe:

1. From the Control Panel, select Drivers.

2. Click Add, and choose Windows Sound System from the list of drivers. Then

click OK. (If the driver is not present on the system disk, you may be prompted to

load Windows NT distribution media.)

3. The Windows Sound System Driver menu appears. Select Interrupt 7(IRQ7),

the default DMA channel, and the default I/O address.

The Digital UNIX operating system supports the sound card through Multimedia Services

for Digital UNIX, which is normally preloaded at the manufacturing site. The

manufacturing site also loads the sound card configuration information into the SRM

console configuration database. The information in the database is passed onto the

operating system.

G-4 AlphaStation 500 Series User Information

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