User Manual

EtherSound ES881, ES1241 & ES16161
Ethernet Audio Bridges
9
Synchronization
ES881, ES1241, and ES16161 support several synchronization modes.
Synchronization via:
• the network (except in ‘Primary Master’ mode)
• the ‘AES In 1’ input
• the Word clock input
If the equipment is ` Primary Master', it provides the clock for the network It can be synchronized on the
internal clock or on the signal connected to the “AES In 1”, or on the signal connected to the Word Clock
input. In the last case, these input signals must be synchronized with the Word Clock. If they are not
synchronized, it is necessary to insert a frequency conversion stage (SRC) from the configuration software.
Likewise, the insertion of the SRC is obligatory in the case of synchronization on the internal clock.
When the device is not in ‘Primary Master’ mode, it is synchronized on the signal coming from the network:
• the ‘Word Clock Out’ output allows synchronizing the devices connected on the ‘AES In 1’ inputs. In
this case it is not necessary to insert an SRC stage.
• If the devices connected to the AES/EBU are not synchronized on the network, sample rate conversion
(SRC) is required.
Use the configuration software provided to set these parameters.
Connecting a computer to manage the EtherSound network
To connect a PC directly to an ES881, it must be equipped with a network card. Use an Ethernet cable to
connect the network card to the “IN” port of the Primary Master.
You can as well access the Primary Master through a regular Ethernet network.
Audio
The pinout used on the XLRs is standard: pin 1 carries the signal ground, pin 2 carries the positive signal
(“hot”, +) and pin 3 carries the negative signal (“cold”, -).
GPIO
ES881, ES1241, and ES16161 are shipped with four GPIs and four GPOs on terminal blocks, counterparts are
supplied. For details see Appendix A.