What is DAC?

Literally means "digital-to-analog converter"! The sound and music we come into contact with in our daily life are continuous analog signals, which are converted into digital signal (ADC) data by record companies or film companies for storage. To recover the data of CD and DVD, it needs to be converted by audio or video DAC. DAC is part of the signal source. The closer to the sound source, as long as there are some slight differences, the more differences the sound performance will be after being amplified by the power amplifier. It is very possible to try a different DAC, and the style of the whole sound system will be completely different!

Ordinary DVD/CD are very cheap DAC chips, which have great influence on sound quality restoration. Fortunately, both DVD and CD have SPDIF digital output (optical fiber or coaxial), so we can use this interface to install better DAC decoder, so as to achieve higher quality sound quality restoration. Different DAC chips have different sound styles. Our friends can install different grades and types of DAC decoders according to their favorite styles.

The more common DVD/CD, the more obvious the effect of adding DAC. Many high-end fever CDs or turntables on the market are already using high DAC chips. If you add DAC to such machines, the improvement of sound quality may not be so obvious.

It was generally believed that the key to determine the sound quality was the main control decoding chip, which was basically correct, but not accurate enough. In fact, the key to determine the sound quality is the digital-to-analog conversion (DAC) unit and the power amplifier unit in the main control decoding chip. DAC is responsible for converting the decoded digital audio stream into an analog audio signal, and the power amplifier amplifies the analog audio signal to a power that can drive headphones or audio. For example, DAC is like a singer, responsible for faithfully singing songs (analog audio signals) from the music spectrum (digital audio stream) that everyone can't understand, while the power amplifier is the singer's megaphone, responsible for amplifying the sound of songs so that everyone can hear them clearly.

The conversion accuracy, signal-to-noise ratio and distortion rate of DAC are the core keys to determine the sound quality, and of course the power amplifier is also very important.

In low-cost DVD/CD main control board, DAC is generally integrated to reduce the overall production cost. However, due to the integration of many other complex circuits, such as decoding, motion control, video control and so on. It is easy to interfere with DAC with poor anti-interference ability, just like the singer above, who has to work in the same room as the chef, computer room, cleaner and receptionist. How can he not be disturbed in the theater? The best way is to give the singer a separate luxury room. Independent audio codec is mainly a "luxury independent room" composed of DAC, power amplifier and other modules.

Independent audio DAC, high-end hi-fi product standard configuration: TDA/KOOC-0/540, TDA/KOOC-0/54/KOOC-0/,TDA/KOOC-0/543, PCM/KOOC-0/702, PCM/KOOC-0/793, PCM 6544. AD 1955，PCM 1739，PCM56，PCM 17 10，PCM 17 16，