The timing signal that is used in a multidevice digital audio system to synchronize the sampling frequency at which the system’s component devices operate. To avoid data loss and distortion, all digital devices in a system must be slaved to a single word-clock master so that their sampling frequencies will be exactly the same.

A synchronization signal used when transferring digital audio data, which is used to ensure that the audio data is received at the same rate it is being transmitted. When two or more devices are digitally connected, all devices must be using the same word clock. If not, it may be impossible to transfer audio signals, or noise may occur in the signal.

Digital data is comprised of "bits" (see DJzone " Bit") which are organized into "words" representing sample values. Word clock is a synchronizing signal based on the sample rate or the speed with which sample words are sent over a digital connection. Word clock is used by the receiving digital device to decipher where in the data stream each sample word ends, as well as whether the word belongs to the right or left channel (in a stereo signal). When transmitting digital audio signals from one piece of gear to another, it is therefore important that their clocks be synchronized (i.e. the receiving device is made to "slave" its clock to the transmitting device's internal clock, or the whole system is locked to an external house sync signal or master clock), otherwise the sample words in the data stream will not be "lined up" correctly in the receiving device, possibly causing clicks, pops and other audio degradations.

Word Length Workstation