1, line input interface
Line-in interface is the line input, which collects audio signals through other audio devices. The line input is related to the Microphone input. Karaoke transmits the sound signals of DVD, VCD and CD to audio equipment, which is line input, and the singer uses Mike as input. Line-in interface is audio line input, for example, the sound signals of other players (such as non-digital signals such as repeaters) can be recorded into the computer through line-in.
2. Line output interface
Line-out interface means line output, through which analog signals processed by sound cards are output to audio devices such as speakers. When line-out first appeared, it was transplanted to the output port of the desktop, purely for external amplification equipment such as power amplifier, so the original data output by line-out was not filtered by chip or rarely filtered by chip, so the sound fidelity was high.
But most of the sound output through line-out is beyond the control of the machine itself. The impedance of the line output is about 300 ohms. If you connect with low impedance headphones, you will feel that the sound is not full, full and inelastic. If you switch to high-impedance headphones, although the sound is not big, it is full and transparent. Generally, the output current is relatively small and will not cause overload.
Line interface components:
The first component of the 1 and line interfaces is the user interface.
This is the main way for users to interact with the line server. Users can send and receive messages, view chat records, add friends, create groups and so on through this interface. User interface is usually based on graphical user interface (GUI), which is convenient for users to communicate and communicate with LINE.
2. Another important part of the 2.LINE interface is the API.
API is the abbreviation of application programming interface, which is a set of rules and protocols that define how software components interact. By using the API of LINE, developers can create their own applications to interact with LINE. These applications can be chat bots, games, social media tools and so on. By using API, developers can gain access to LINE and use the functions and services provided by LINE.
3. Another important part of 3.LINE interface is SDK.
SDK is the abbreviation of software development toolkit, which is a set of tools and resources for developing software. By using the SDK of LINE, developers can easily create their own LINE applications. SDK includes various libraries, documents, code samples and so on, which can help developers better understand the LINE interface and use the functions and services of LINE.