Other connector types can be used such as RCA in this way as well. Devices can be connected using a BNC cable connected to the “Word Clock In/Out” of the device. ConnectionsĬlocking between devices can be carried out in a few different ways. However this depends on the devices being used. This way, when you open a project in a DAW, the audio interface should change to match the project sample rate, and therefore change the sample rate of all the slave devices. Quite often the best device to set as the master is the one that is connected to the computer (where possible) such as a ProTools Rig or an audio interface. Choosing a Master DeviceĬhoosing the master device is usually very flexible. The master clock signal can either come from the internal clock on the master device, or you can get a separate, dedicated unit. The device which is providing the clock signal is known as the master, while all the units accepting this clock signal are referred to as slave devices. When syncing two or more devices, there needs to be one unit that is providing the clock signal to all the rest of the units. If one is spinning faster than the other, the teeth will not interlock and the system won’t work. They have to be spinning at the same rate for the cogs to mesh together. A simple analogy explaining the need for syncing two devices with a clock signal is by imagining two spinning cogs. Multiple devices need to be synced so the digital audio being transferred between them is read correctly. When you are only looking to use one unit, such as an audio interface, you don’t really have to worry too much about clocking, however when using multiple units it becomes a little more complex. If the clock frequency changes, it is known as “Drift”. When the clock is not consistent in its timing, the resulting distortion is known as “Jitter”. If this does not happen, the amplitude of the signal will not be recorded or played back at the correct time and so distortion will be introduced into the signal. Samples are taken many times a second, and need to occur at regular intervals (44.1 kHz is the sample rate used in commercial CD audio). Digital audio is made up of amplitude values of a signal at different points in time (known as samples). FAILSAFE mode is a broadcast application, which monitors the two input signals and performs an automatic switch over of all 12 outputs if the primary word clock signal fails.In A to D and D to A conversion, the digital signal needs to be clocked accurately to prevent distortion. Supported sample rates are 44.1, 48, 88.2, 96, 176.4 and 192 kHz as well as the respective super clocks (Fs x256).
#Digital audio word clock generator#
GENERATOR mode changes the unit into a ultra low jitter audio master clock generator with 12 programmable outputs. Input B also accepts Fs x256 signals (also known as super clock). Ten LEDs on the front panel indicate the sample rate of the incoming signals.
In operation mode DISTRIBUTOR the two inputs A and B can be routed individually to each of the 12 outputs. Ground potential variations, similar to earthloop induced hum in analog audio, can cause jitter in clock signals, a transformer isolated input eliminates this effect. The unit provides two transformer isolated word clock inputs and 12 word clock outputs to receive and distribute word clock signals over long distances. Nanoclocks is a word clock distributor with integrated audio master clock generator, dual inputs with frequency status indicators and programmable output matrix - a flexible tool for all extensive digital audio installations.
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