This page explains how to determine the number of DSP output channels. This allows the designer to know how many speaker processors and mixer/matrix outputs are required.

The number of outputs depends on how many different signals are needed. This can be determined in three main steps.

​A) Speaker (SP) configuration

First, the number of outputs is determined by the SP unit configuration. This is because separate channels are required depending on the number of high-frequency and low-frequency signals required. Please see here for the SP unit configuration.

​B) Mono / Stereo

For a stereo system, at least two separate lines are required from input to output. Of course, at least 2 lines are also required in the SP processor.

​C) Delay Point

If there is a sub SP and main SP, the arrival time of the sound output from both will be different. The difference in arrival time creates an overlap of sounds, which reduces the clarity of the speech. This is something like a blurred image with the lens not in focus. In order to prevent this, Delay is set to the sound output from the SP closer to the listening point. That is, an independent output of the SP processor is required for each different Delay value.

This is a case with two delay points.

​Summery