Sonifex avn PC-AD2, Руководство пользователя

Страница: 17 / 24

9
PC-AD2 - GPIO 4
9
PC-AD2 - Windows Audio Operation 3
Fig 3-4: PC-AD2 AES 3 Frequency Screen
Fig 3-5: PC-AD2 Recording Screen
sample timing differences. All aliasing products are attenuated by more
than 120dB. The converter’s passband frequency response is shown below,
normalised to the lower of the input and core sampling rates. The vertical
scale is 10dB per division.
Line Input 1 / Microphone Operation
The first analogue input channel on the PC-AD2 can be used either as a line
level, stereo microphone or dual mono microphone input. The recording
endpoints will change according to the mode selected. (see the earlier
section for an explanation of audio endpoints).
A shared endpoint is automatically activated when an application starts
recording from it, with the other endpoint made unavailable. The PC-AD2
uses this mechanism to switch the microphone preamplifier and optional
+48V phantom power on and off.
If only one or the other is ever going to be used, it’s recommended that the
unused endpoint be disabled so that the required one is always available.
To disable an endpoint, open the Sound applet by right-clicking on the
loudspeaker symbol in the bottom right hand corner of the screen and
selecting
Recording devices . Right-click on the endpoint in question and
select Disable .