Crown Audio by Harman

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Glossary



What is latency, and does I-Tech have a fixed latency?

The latency of a device is the amount of time it takes a signal to travel from the device's input to its output .

When using the analog inputs, latency has been measured at 1.13ms. The latency of the input/DSP section is fixed, and does not change whether using no processing or maximum- available processing.

Latency with an AES/EBU input varies due to buffering of the signal that occurs before it is sent to the input/DSP stage, and is dependent upon the input AES/EBU data rate as shown below:
 

AES/EBU SAMPLE RATE

LATENCY

32 KHz

2.744 ms

44.1 KHz

2.358 ms

48 KHz

2.275 ms

96 KHz

1.807 ms

In addition to these sources of delay through the amplifier , there is the possibility of some minimal delay due to the wiring of the AES/EBU signal. The AES/EBU standard 110Ω cable has a delay of 6ns/meter. In addition, the I-Tech amplifier has a delay of ~85ns in its active digital loop-thru. To put this in perspective, a system with 50 meters of cable and sixteen amplifiers all looped through each other would have a delay at the last amplifier of 1.575us. This is equivalent to a delay of less than one-quarter inch. This additional source of delay will be inconsequential in almost all systems and can be ignored.

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