There must be many users have noticed that the CD and DVD drives are so-called SPDIF output , and many sound cards, especially in the expensive range, also have a SPDIF connector . Let's see what it represents this connector.
SPDIF output in the CD-ROM drive
The SPDIF -. Is the standard for digital audio transmission Digital transmission of audio data, unlike analog, suppresses noise, and therefore this type of transmission prefer music lovers, musicians and professionals whose work is connected with the sound, which use a computer as a tool. Often, however, the computer has a SPDIF input , which many users who collect the computers themselves, not even used for its intended purpose.Usually, when a music CD is inserted into CD-ROM, the drive has to convert the data read in a digital format to an analog audio signal. This analog signal is sent to the sound card on the corresponding cable ( the CD the audio cable ). For people who pay great attention to the noise level of the signal, you should know that there are two things that can reduce the sound quality. Firstly, CD-ROM drive can use low-quality DACs (digital-to-analog converter) and thus create noise. Secondly, because of the fact that the transfer between CD-ROM drive and a sound card implemented in analog format, for connecting the cable can transmit noise from electromagnetic noise within the computer.
Analog and digital connections CD-ROM drive to the sound card
Therefore, if your sound card has a SPDIF input, and CD-ROM has a SPDIF output, instead of using an analog connection you have to make a choice in favor of digital. This connection allows the analog-to-digital conversion is placed in the sound card, instead of using the internal DAC CD-ROM drive . To connect using SPDIF cable . This cable is easy to do by yourself or you can buy ready-made in specialized outlets.
Digital audio cable to connect the optical drive
A fragment of a sound card Sound Blaster Audigy2
The figure shows the detailed sound card Sound Blaster Audigy2. On its top is a two-contact SPDIF connector for digital connecting the CD-ROM, and on the right you can see SPDIF_IO connector for external digital sources via the SPDIF connection (such asa problem with the sound from the HDMI can be easily solved if you connect the sound card to the graphics card via the SPDIF cable).
Some motherboards with integrated audio card also has SPDIF input for connecting to a CD-ROM, as shown in the figures below. This connector can also be used for a bracket with external SPDIF connectors to your computer.
Fragments of motherboards with integrated audio card with a SPDIF connector
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