Digital audio is a technology that uses digital methods to record, store, edit, compress or play sound. It is a brand-new sound formed with the development of digital signal digital audio signal processing technology, computer technology and multimedia technology. Treatment means. The main application areas of digital audio are music post-production and recording.
The storage of computer data is accessed in the form of 0 and 1, then digital audio is to convert the audio file first, and then convert these level signals into binary data to save, and convert these data to analog electricity during playback The flat signal is sent to the speaker for broadcast. Digital sound is essentially different from the sound in general tape, radio, and television in terms of storage and playback methods. In contrast, it has the characteristics of convenient storage, low storage cost, no sound distortion during storage and transmission, and very convenient editing and processing.
Common digital audio interfaces include I2S interface, PCM interface and SPDIF interface. Here is only a brief introduction. ¾ I2S interface:
It can only transmit mono or dual channel stereo digital audio, and the data format is PCM format. Three types are derived from this interface: left-aligned format, right-aligned format, and I2S format. I2S time difference performance is better than SPDIF, suitable for short distance communication. ¾ PCM interface:
Also called DSP mode audio interface. Generally used to transmit mono or dual channel stereo digital audio, but in theory can also transmit multi-channel digital audio. The data format is PCM format. ¾ SPDIF interface:
SPDIF (Sony Phillips Digital Interface) SONY, PHILIPS digital audio interface. Its transmission carrier has two kinds of coaxial and optical fiber, the latter has stronger anti-interference ability. SPDIF can transmit PCM streams, as well as Dolby Digital and DTS surround sound compressed audio signals. The PCM stream is the original, uncompressed audio signal, and Dolby Digital and DTS are also derived from the PCM stream.
Digital audio applications:The application of digital audio is not very extensive, but it has its own field, that is, the recording of music and a post-production of this song. Digital audio can convert its audio file first, and then convert these signals belonging to the audio file into a unique data to save. When playing the previously converted music, you can change the previous data into A simulated signal is then output with a microphone. The digital sound formed in this way is essentially different from the way the sound is broadcast on the radio, the speaker, and the TV. Compared with these, digital sound has the advantages of convenient audio storage, and the advantage of cheap audio storage cost. There are notable characteristics that the file will not be damaged during the transmission and the sound changes, and there are some very convenient features such as editing and processing.
The editor will tell you some basic knowledge of digital audio, including sampling rate, compression rate, bit rate and quantization. The higher the sampling rate percentage, the better the sound quality in digital audio. The compression rate refers to the ratio of the file before being compressed to the file after being compressed. Bit rate is an index of reference performance, indicating the bit value of digital audio in a specific time. The magnitude is used to describe the data of digital sound. These basic knowledge of digital audio contains a lot of information about digital audio. I hope that if you want to understand more about the basic knowledge of digital audio, you should check the information.
AC wall 5V 2A power adapter with multiple tips works for many small 5V electronics. Like Scanner, Router, Bluetooth speaker, Foscam Wireless IP Camera, CCTV camera, USB hub, bluetooth GPS Receiver, tv box, tablets, Baby Monitor, Graco Swing, Home Phone System, VoIP Telephone Routers, Serato DJ Controller, DVR, ADSL Cat, External battery, hubs, switches, Led Strip, String Lights, vibrator, Raspberry pi 3 Raspberry Pi A/A+/B/B+ Raspberry Pi Zero and more 5V devices. (5V ONLY)
Worldwide Input: 110-240V; Output: 5V 1000mA, 1.5A, 1.75A, 5V 1A, 5V 500mA, 5V 2.1A, Max 10W. DC Tip Polarity: Central Positive(+). Please read manual carefully before using 5vdc power supply.
Design-safeguard features against incorrect voltage, short circuit, internal overheating and overloading. This 5v Ac power supply charger is made from quality material to ensure the long lifetime. Power your 5v electronics perfectly and replaces lots of 5 volt power chargers
Package include: 1 x High Quality 5V 2A AC DC Power Adapter, 1 Set x Tips
5V Switching wall charger 6V Switching wall charger 9V Switching wall charger 12V Switching wall charger 15V Switching wall charger 19V Switching wall charger 24V Switching wall charger 36V Switching wall charger 48V Switching wall charger
Shenzhen Waweis Technology Co., Ltd. , https://www.waweispowerasdapter.com