Peering and sampling rate considerations

Owned by David Jacques
Last updated: Jan 30, 2023
3 min read

For more details on Peering in the Monitoring Mission, please consult the Anubis User manual
For more details on Peering in the Music Mission, please consult the Anubis Music Mission Appendix

Scope

Peering has been designed to easily increase the Anubis I/O without having to use external system (PC or MAC) or applications such as ANEMAN.
As long as those devices are from Merging and given that they are on the same RAVENNA network and running the same firmware generation, you will be able to discover and peer those devices modules from Anubis.

In this kind of setup, the Anubis is expected to be the centerpiece of the configuration.
Regarding sampling rate, it means that Anubis is the sampling rate master.
It will send its sampling rate to the peered device(s) when establishing the peering connection, or when you change its sampling rate.
Note: if the sampling rate on the peered device changes, Anubis will not set it back until you re-establish a peering connection or change the Anubis sampling rate.
Note: The Auto Sampling Rate feature don't need to be activated on the peered device to follow the Anubis sampling rate.

 

Syncing on an external clock

If you need to sync your configuration on an external clock (AES, MADI, Wordclock,…), you will have to use the peered device connectivity.

  • In the Anubis Settings > General, disable the PTP Master option.

    Notes:
    This step is required because only the Master PTP device can be synced on an external clock.
    The PTP status may remain on Master, this is not a problem at this step.

  • In the peered device, set it to sync on the external clock.
    In our example, a peered Hapi MKII is set to sync on an incoming Wordclock
    Go in the IO & Sync page, and select the WCK.

    Notes:
    The peered device will change to PTP Master, and the Anubis will change to PTP slave, automatically.
    If you want the peered device to automatically follow the external clock sampling rate, activate its Auto sampling rate option.
    Depending on the clock type, the Auto sampling rate should not be enabled, e.g. if receiving a 48Khz Wordclock and willing to run at 96 Khz.

  • In this kind of setup with external clock, the Anubis sampling rate will not follow automatically.

    • You may change the sampling rate manually on the Anubis Settings > General.

    • You may also use Aneman, by creating a Sample Rate Zone (New Zone - Sample Rate Zone), dropping the Peered device on the crown (master) icon, and Anubis anywhere in the zone.
      Note: if you close Aneman, it will no longer be able to set the sampling rate.

    • (Advanced users) In the Advanced pages, you can create a Source on the Peered device, create a Sink in the Anubis and connect it on the source.
      Then activate the Auto Sampling Rate option in the Anubis Settings > General.
      Note: In such case, you have to change the sampling rate from the Peered device (or from the external clock if the Peered device is set to automatically follow the clock sampling rate), not on the Anubis.