DSP
This page explains about DSP (digital signal processor). The definition and composition of DSP is beyond the scope of this page. The explanation focuses on the role that applications using DSP play in PAs and sound systems.
What is "DSP"
The detailed definition of DSP is not important, at least not on this page. On this page, it is roughly defined as "something that causes some kind of change in the input signal and outputs it" as shown in the diagram below.
The "changes" that DSP makes can be broadly divided into
1) overall volume, 2) volume for each frequency, and 3) output timing.
Also, what are these three changes used for?
A) To create sound suitable for the occasion
For example, "easy to listen to" , "powerful", ....
B) To protect the system from high-level signals
C) To create one sound from different types of speakers
D) To create one sound from speakers located in different positions
1) overall volume, 2) volume for each frequency, and 3) output timing.
Also, what are these three changes used for?
A) To create sound suitable for the occasion
For example, "easy to listen to" , "powerful", ....
B) To protect the system from high-level signals
C) To create one sound from different types of speakers
D) To create one sound from speakers located in different positions
Where is the DSP?
We tend to think of DSPs as being used for sound systems in mixers and matrices, but now they are also being used in wireless tuners and amplifiers due to the miniaturization of circuit boards. It is also used in PA systems. However, on this page, for the sake of clarity, the explanation will be based on examples that exist in the matrix.
The diagram above shows the sound system. The gray shaded area is the matrix product. Volume marks, [Filter], [Comp], etc. represent each DSP function. DSP applies various changes to the signals passing through it.
The inside of the matrix can be roughly divided into two parts. The input side and the output side.
On the input side, there are DSPs that mainly process input sounds from microphones and CDs.
On the output side, there are DSPs that mainly perform processing for the speakers.
The DSPs depicted here are only representative ones, and the order in which they are listed depends on the product, but the links below will introduce the functions of these DSPs in more detail. Click on the image.
The inside of the matrix can be roughly divided into two parts. The input side and the output side.
On the input side, there are DSPs that mainly process input sounds from microphones and CDs.
On the output side, there are DSPs that mainly perform processing for the speakers.
The DSPs depicted here are only representative ones, and the order in which they are listed depends on the product, but the links below will introduce the functions of these DSPs in more detail. Click on the image.
