Hardkernel's Exclusive North American Distributor

C0/C1+/C2 HiFi Shield 2 with S/PDIF [0025C]

$39.95

Compatible with the ODROID-C0/C1+/C2. Not compatible with the original ODROID-C1.


The HiFi Shield 2 provides stereo RCA connectors and an S/PDIF optical connector to connect to external amplifiers and other audio equipment. Via TI's high-end PCM5242 DAC chip (aka Burr-Brown) (formerly PCM5102), it supports 16, 24 and 32 bit audio formats with minimal THD+N ratio (0.002%) and ideal dynamics (114dB+) (formerly 100db+), plus amazing sampling rates of 384kHz.

The dedicated S/PDIF interface supports up to 192kHz/24bit resolution via optical (Toslink) output.

Using the new I2S expansion added to the ODROID-C series (not available on the original ODROID-C1, however), we save a USB port and allow the user to select their audio playback system of choice, such as Volumio, RuneAudio or XBMC/Kodi for HiFi audio playback. 

  • The DAC chip uses a high-end PCM5242 chip from Burr-Brown company (now part of TI) which utilizes the I2S interface. It supports 16, 24 and 32 bit audio formats with minimal THD+N ratio (0.002%) and ideal dynamics (114dB+), plus amazing sampling rates of 384kHz.
  • Volume controls via I2C interface is a great feature to maintain great audio quality with adjustable audio output volume.
  • The output ports include gold-plated stereo RCA terminals and an S/PDIF connector.
  • The dedicated S/PDIF interface supports up to 192kHz/24bit resolution via optical (Toslink) output.
  • An ultra-low noise dropout regulator is populated for the power supply, significantly reducing power supply noise and greatly increasing the signal to noise ratio.
  • The I2S interface allows for direct decoding of the digital input to analog output using master clock synchronization.
  • The PCB surface is comprised of gold-plating on top of 2 oz. of copper, ensuring signal continuity and reducing signal reflection and refraction.
  • Balanced (differential signal) audio output soldering pads are available.


KEY FEATURES

  • Stereo RCA jacks (gold-plated)
  • S/PDIF (Toslink) connector
  • PCM5242 DAC chip supports 16, 24 and 32 bit audio formats
  • Minimal THD+N ratio (0.002%)
  • Ideal dynamics (114dB+)
  • Sampling rates of 384kHz

INCLUDES

  • HiFi Shield 2 Board (ODROID single-board computer is not included)
  • 4 x 11mm M3 PCB spacer (Metal)
  • 8 x 10mm M3 PCB spacer (Plastic)


NOTES
  • Android not supported. Hardkernel states they have no plans to support the Android OS to enable the I2S driver for Android kernel and HAL.


LINKS


DEVELOPMENT TESTING

The HiFi Shield 2 is a high-resolution Digital to Analog Converter(DAC) for the ODROID-C2 and ODROID-C1+. This is a special sound card for the C2 and C1+, that is optimized for the best fidelity audio playback quality. It delivers a nicely balanced sound, solid, deep, wide and nicely layered.

We've analysed the the audio quality of the HiFi Shield 2 DAC output with the famous industry standard equipment, Audio Precision. The Audio Precision is a high performance audio analyser optimized for the digital audio product.

The analog output of the HiFi Shield 2 is connected to the equipment and measurement data shows on the host PC.


Test conditions

RuneAudio image run on the ODROID-C1+ with HiFi-Shield 2. 192KHz audio test files were used.

Audio Precision Input : Analog unbalanded 2ch, 600ohm


Hardware volume/mixer settings

Analogue : -6.00 dB (amixer -c 1 sset Analogue 0)

Digital : -3.00 dB (amixer -c 1 sset Digital 201)

Deemphasis Filter : On (amixer -c 1 sset Deemphasis on)


Software volume settings

RuneAudio UI volume : software volume 100 (maximum full scale)


The Signal to Noise Ratio (SNR)



Noise Level in dBm



The Frequency Response and RMS output level in dBV



The Total Harmonic Distortion + Noise Ratio (THD+N)



The Frequency sweep THD+N Ratio



The FFT spectrum analyzer for 1Khz signal



The HiFi Shield 2 is a great investment if you want an audiophile set-up with ODROID-C2/C1+/C0. Enjoy a variable output that connects directly into a power amp or active speakers.