Part Ix Configuring Aes3 Input Audio - Tieline Merlin PLUS User Manual

9 Configuring AES3 Input Audio
The codec has an IN1/AES3 input on the rear panel of the codec for AES3 (AES/EBU) format audio.
This balanced 110 ohm female XLR input can operate effectively over distances of up to 100 meters
and accepts both mono and stereo AES3 signals. If your codec supports multiple channels of AES
audio use the DB25 EXPANSION AUDIO I/O connection to send/receive up to 4 additional channels
of AES3 audio. Please note that expansion inputs/outputs 3, 4, 5 and 6 must be either all analog or
all digital AES. See
1. Press the SETTINGS
2. Navigate to Audio and press
3. Select Input Type and press the
4. Navigate to the inputs you want to configure and press the
Analog and AES3.
The 3 pin male XLR AES3 OUT connector is capable of sending both mono and stereo AES3
signals.
Important Notes:
·
There is a maximum of 6dB of additional gain available when adjusting a AES3 digital
input.
·
If you switch back to the analog input setting after selecting AES3, the previous analog
settings will be recovered.
AES3 Sample Rate Conversion
The codec contains two sample rate converters.
Input Sample Rate Converter
The codec implements an Asynchronous Sample Rate Converter (ASRC) to convert the sample
rate of an AES3 input to the sample rate set in the codec. The codec sample rate is determined
by the selected algorithm. For example, if you select the Music algorithm, the sample rate will
be set to 32kHz.
By default the codec will up-sample all channel 1 and 2 AES3 input sources to 96kHz sampling
unless your audio source uses a 44.1kHz sample rate.
Important Notes: If your codec supports up to six AES3 inputs, the three AES3 stereo
inputs are multiplexed onto analog inputs 1, 3 and 4. There are also three AES3 stereo
outputs via the AES3 Out XLR and two are multiplexed onto outputs 3 and 4 (see
Appendix B
The inputs have asynchronous sample rate converters to facilitate sources with different
sample rates being attached to the codec. For example, IN1-AES (Inputs 1 and 2) can be
48kHz AES-IN2 (IN3&4) can be 32kHz and AES-IN3 (IN5&6) can be 96kHz
Output Sample Rate Converter
The sample rate of the AES3 output is configured using the clock source setting via the
SETTINGS
rate frequency of all AES3 output signals and there are three possible settings.
© Tieline Pty. Ltd. 2017
Appendix B for the DB25 wiring pin-outs.
button.
.
for pin-outs of inputs 3 and 4 and outputs 3 and 4).
button and then Audio > Input Type > AES3 Out. This configures the sample
Merlin PLUS User Manual v2.0
button.
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button to toggle between