Pull Up And Pull Down Operation; Sample Rate Converters - Focusrite RedNet D64R User Manual

Pull Up and Pull Down Operation

RedNet 6/D64R is able to operate at a specified pull up or pull down percentage as selected in the
Dante Controller application.
When operating in 64-channel (ie. non-varispeed) mode, MADI is not capable of operating at greater
than approximately ±1% of the nominal sample rate. This may become a problem when the network
clock domain is pulled up beyond 1% of nominal. In this condition, the Output Varispeed indicator on
the front panel will flash to indicate that the output is out of MADI tolerance. Therefore, to continue
generating a valid RedNet 6/D64R MADI output, it would be necessary to operate the MADI output in
56-channel (varispeed) mode, use sample rate conversion or reduce the network rate to within 1%
of nominal sample rate.

Sample Rate Converters

Sample Rate Conversion will need to be switched in for any sources that are not using the current
system clock as a reference signal. This can be enabled in the RedNet Control application under the
'Sample Rate Converter' menu.
This can be particularly useful in post-production environments where the network audio is pulled
up or down, but it is necessary to have the MADI stream run at a base sample rate to interface – for
example – with a mixing console.
Note that engaging the sample rate converters will increase the overall latency of the device.
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