Sonifex avn PC-AD2, Руководство пользователя

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PC-AD2 - Introduction 1
any sample rate can be played and recorded. Extended software bit depths
of 32 and 24 bits are supported as well as 16 and 8 bits for playback and
recording. For each AES-3 input, the received sampling rate, frame lock and
sampling rate converter status is shown.
The playback and recording topology is virtualised because Windows
treats each input source as its own ‘endpoint’. Endpoints are the physical
audio sources and destinations, such as microphones, speakers and line
connectors. Each of the PC-AD2 card’s physical line inputs is represented
by an endpoint device, and as the hardware has separate A/D converters
or AES-3 receivers for each one, they can be used simultaneously. A
Microphone endpoint is also created which is shared with analogue Line
Input 1 endpoint. The Windows mixer API is virtualised for each application,
providing just a mute and volume control for each endpoint and affecting
only the audio going to and from that application.
The PC-AD2 has two optically-isolated general purpose inputs and outputs
which are accessed through a programming API supplied with the driver
package. A demo program is included with the driver package to illustrate
the operation of the GPIO API and to quickly test the GPIO functionality.
All the standard Windows audio APIs are available including the Core Audio
API, Wave, DirectSound, DirectShow, MCI and MIDI playback, as are a
variety of audio compression modes via the Windows Audio Compression
Manager or other software compression systems.
Multiple cards may be installed in a
single PC.
A 44-pin high-density D-type connector to XLRs & 9 pin D-type breakout
lead is offered as an option, the PC-AD2BC.