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Barix Instreamer User Manual Version 01.03

Page 8

7.3 Audio settings

These settings adjust the audio input and output.

Input source

Choose the desired input source.

Channel Mode

Select between

"stereo"

and

"mono"

input mode.

Encoding Quality

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.

Qual.

0 1 2 3 4 5 6 7

44.1

68 73 80 90 105 125 140

22.05

35 38 40 45 50 60 75 90

Sampling Frequency

Choose between 6 different settings. From

"MPEG1 / 48

kHz"

down to

"MPEG2 / 16 kHz"

. In case of S/PDIF audio

input, MPEG1 is used and the sampling frequency is auto

detected.

Advanced Encoder Settings

These Settings are for advanced users only. Detailed

information about the Encoder Settings can be found in the

datasheet of the Micronas MAS3587 MP3 encoder.

A/D amplifier gain

Choose the desired gain (

"-3"

"19.5"

dB) for the A/D

amplifier (only for the line input).

MP3 Frame CRC

If set to

"enable"

, the encoder will include the CRC-16 to

each MP3 frame.

MP3 Bitreservoir Mode

The Bitreservoir is used to compensate the differences

between the predefined frame sizes. If set to

"used"

, the

encoder will use the bitreservoir.

MP3 Channel Mode Extension

"Enable"

"disable"

the MS-Stereo encoding (for stereo

only).

MP3 Copyright Protection

"Enable"

"disable"

the copyright protection bit in the

MP3 bitstream.

MP3 Stream Type

Select between a

"copy"

or an

"original"

bitstream in order

to set the appropriate bit in the MP3 bitstream.

MP3 Emphasis

Select emphasis

"none"

"50/15 us"

"CCITT J.17"

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 22 23

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