User Manual AX32
Doc no. AX32-8002-A-4 Rev. date 140124 Page 18 of 31
any of the digital inputs. For
example, if it is set to Pro Tools 1,
the sample rate will automatically
follow the sample rate in your Pro
Tools project.
Out Word clock
Word clock, base
This parameter sets whether the
Word Clock output should only
follow the base sample rate (44.1
kHz / 48 kHz) or follow the actual
sample rate (44.1k / 48k / 88.2k /
96k / 176.4k / 192k).
Sync term. High Z
75 ohm
This parameter sets whether the
Word Clock input is terminated
internally in the AX32 with 75
ohm, or left unterminated. It is
strongly recommended that the
Word Clock input is terminated in
75 ohm for optimum
performance.
Pro Tools Interface
The 2 Pro Tools interfaces can be configured as either 2 x Primary or as
Primary/Extension. Furthermore they can be configured to emulate either 2 x HD-IO
or HD-MADI, providing 32 channels in each interface.
MADI Coax Interface
The MADI Coax interface can be configured for compatibility with different
implementations of MADI.
Frame rate can be set to “Legacy” or “High”, but only if the sample rate is higher
than 48 kHz. If the sample rate is 44.1 kHz or 48 kHz, the Frame rate is always
Legacy. In Legacy mode, the MADI Frame length is maintained and adjacent
channels are “merged” into one channel. In High mode, the MADI Frame length is
reduced rate and consequently the Frame rate is increased. Because of this
difference, the High mode has lower latency than the Legacy mode. Please note
that some 3
rd
party MADI products may not support High mode.
Frame size can be set to “Normal” or “Extended”. Normal mode supports up to 56 channels whereas
extended mode supports up to 64 channels.
Ch. status can be set to “Default” or “Transparent”. The Ch. status setting is only relevant when routing
incoming AES/EBU or MADI channels to a MADI output. In Default mode, the MADI Channel status bits are
defined by the AX32, whereas in Transparent mode the channel status bits from the relevant source
(AES/EBU or MADI) are transferred to the outgoing MADI signal. In most general cases it is best to leave it in
Default mode.
Input rate can be set to “Auto” or “As AD”. In Auto mode, the AX32 will try to determine the sample rate
of the incoming MADI signal. In As AD mode, the AX32 will assume that the incoming MADI has the same
sample rate as the AX32. It is usually recommend to leave this in Auto mode, however there may
occasionally be compatibility issues with 3
rd
party products. In that case, setting it to As AD may solve the
problem.
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