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Digital Input. Digital Output

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Digital input and digital output of sound card is connectors for:

- pass binary audio data;

- connect audio card to other devices for control and synchronization.


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1. SPDIF is digital input or output for transmit/receive audio to/from a recording device, different sound card, DAC/ADC, amplifier or AV-receiver without loss of quality.

SPDIF RCA   SPDIF (RCA type)

SPDIF fiber female  optical SPDIF (fiber or optical type female - placed at card)

SPDIF fiber male  optical SPDIF (fiber type male - cable connector)

SPDIF modes:

        - AES / EBU - studio professional format digital audio;

         - PCM - uncompressed audio stream;

         - AC-3, DTS, Dolby Digital - compressed multi-channel audio.

Pass-through (transit) term  means
     sound card passes through (without changing)
           coded (AC-3, DTS, Dolby Digital) multichannel soundtrack (as recorded on DVD)
                to AV-receiver.
Receiver decodes soundtrack to multichannel PCM stream.

      Digital input/output SPDIF can be used to synchronize several sound cards. This is necessary to increase number of channels recording and/or playback.

 

2. MIDI input and output are special connectors for hardware MIDI-keyboard or controller, synthesizer, audio processor.

MIDI Input and Output MIDI Input and Output connectors

 

MIDI devices

 

3. Wordclock are input and output to synchronize multiple sound cards or other devices.

Word Clock female Wordclock connector. Female connector installed at device

Word Clock male BNC cable connector for Wordclock

For multi-channel recording used two or more sound cards (same or different) synchronized by clock (sample rate). For synchronization used special input and output Word Clock (bayonet type) or SPDIF.

Wordclock devicesWordclock devices

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