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These settings adjust the audio input and output.
Input source
Choose the desired input source.
All input sources except "Line stereo" are mono.
If you are using an Annuncicom 200 a further option is available to select the SUB connector for Aiphone use.
If this is selected the audio output will also be directed to the SUB interface.
NOTE: Aiphone panels have a "ring" button which when pressed produces a signal on the SUB interface.
This signal is used to trigger digital input 0 on the Annuncicom.
However, this signal may also be triggered by audio input and is, therefore, filtered out by the FW.
For this filter to be effective, Aiphone panels should only be connected to the SUB interface
if the SUB interface is selected as an input source.
Default setting is "Mic".
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Microphone gain
Choose the desired gain ("21" - "43.5" dB) for the microphone.
Default setting is "21" dB.
A/D amplifier gain
Choose the desired gain ("-3" - "19.5" dB) for the A/D amplifier.
Default setting is "-3" dB.
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Encoding
Choose between different encoding types (audio compression) and sampling frequencies.
From "MPEG1 / 48 kHz" down to "MPEG2 / 16 kHz" and "uLaw", "aLaw" or "PCM" at 8 or 24 kHz.
Default setting is "MPEG2 / 22.5 kHz".
MPEG Encoding Quality (MP3 only)
Choose between "0 lowest" and "7 highest" in steps of 1.
The Encoder Quality table below shows the average bit rate in kbit/s for the quality settings and sampling frequencies in kHz.
Default setting is "0 lowest".
Qual. | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
44.1 | 65 | 68 | 73 | 80 | 90 | 105 | 125 | 140 |
22.05 | 35 | 38 | 40 | 45 | 50 | 60 | 75 | 90 |