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Bare green circuit board with USB plug, 3.5mm jack and S/PDIF port

SMUGDESK

SMUGDESK PCM2704 USB DAC Audio Adapter S/PDIF 3.5mm Jack Playback

SKU CH-2AKA-7AWAX

Converts USB audio to S/PDIF digital and 3.5 mm analog outputs using the PCM2704 chip, bus-powered with no driver needed

  • PCM2704 chip provides stable USB audio decoding for clear playback
  • S/PDIF digital output connects to external amplifiers or decoders
  • 5mm analog jack drives headphones or active speakers directly
  • USB bus-powered operation removes the need for a separate power supply
  • Plug-and-play on most Windows systems with no driver installation required

USB DAC decoder board with S/PDIF and 3.5mm output

The SMUGDESK board uses a PCM2704 decoding chip to convert a USB digital audio stream into both S/PDIF digital output and 3.5mm analog output. It draws power directly from the USB port so no external adapter is required. The bare circuit board design is intended for DIY audio projects or as a replacement for a failed onboard audio chip. Most Windows systems recognise the device automatically without driver installation.

Suits DIY builders and users with faulty onboard

This module fits hobbyists building a custom external sound card or modifying a chassis who are comfortable handling a bare PCB. It also serves desktop owners whose motherboard audio has failed and who need a simple USB fallback for music playback and video sound. Buyers who want a finished product with an enclosure, volume knob or headphone amplifier should look elsewhere. It is not suited for applications requiring balanced outputs, high-sample-rate studio recording or multi-channel surround decoding.

PCM2704 chip provides USB bus-powered stereo

The integrated PCM2704 handles the USB-to-audio conversion and limits the output to two-channel stereo playback. Because the chip is powered entirely from the USB bus, the board adds no extra cabling or power supply to a build. This single-chip architecture determines the maximum sample rate and dynamic range available, so verify that stereo USB audio meets the project requirements before purchasing.

Highlights

  • PCM2704 chip provides stable USB audio decoding for clear playback
  • S/PDIF digital output connects to external amplifiers or decoders
  • 5mm analog jack drives headphones or active speakers directly
  • USB bus-powered operation removes the need for a separate power supply
  • Plug-and-play on most Windows systems with no driver installation required

Specifications

No published specifications for this item yet.

Questions about this item

Should I use the S/PDIF output or the 3.5mm jack for my setup?

Choose the S/PDIF port to send a pure digital signal to an external DAC or digital amplifier. Use the 3.5mm jack to connect headphones or active speakers directly for analog listening.

What does the PCM2704 chip actually do for my computer audio?

It converts the USB digital audio stream from your PC into both a coaxial S/PDIF digital output and a 3.5mm analog signal, bypassing a faulty or low-quality onboard sound chip.

Does the USB interface limit the audio quality I can get from this board?

The USB connection provides both data and bus power, so no external adapter is needed; the PCM2704 handles the decoding for standard stereo playback on most Windows systems without drivers.

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