Delay analysis in professional audio system: the process of audio information transmission usually involves the delay parameter index test. For large audio systems, the smaller the time spent by each equipment encountered in signal transmission, the better, and the better the adjustable dynamic range obtained by the system. In big systems, we usually want our DSP devices to provide enough signal delays to handle speaker signals given to different distances. Is it contradictory? In fact, these are two different indicators, and we need to distinguish this question conceptually. The total time required when a signal enters a device and this signal reaches the device. It is determined by the circuit, the hardware structure design and the algorithm. So testing this indicator is actually testing the time consumed by the device to process or pass the signal by signal, using the audio processor as an example, including audio sampling time, decoding coding time, audio processing (AEC \ AFC \ ANC \ AGC), etc. If the shorter the time, within a certain threshold range, then we can think that the index of the device is good enough, and the shorter the delay, the better the performance.

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