HiFi Shield 2 (Hardkernel) for ODROID-C2 / C1+
      HiFi Shield 2 (Hardkernel) for ODROID-C2 / C1+

      HiFi Shield 2 (Hardkernel) for ODROID-C2 / C1+

      HK-HIFI-2
      HiFi Shield 2 (Hardkernel) for ODROID-C2 / C1+
      Množstvo:
      HiFi Shield 2 (Hardkernel) for ODROID-C2 / C1+

      HiFi Shield 2

      Works with the ODROID-C2 / C1+. This is not compatible with the original ODROID-C1.

      The HiFi Shield Plus provides both stereo RCA connectors to connect to external amplifiers and other audio equipment. Via TI’s high-end PCM5242 DAC chip(known as Burr-Brown), it supports 16, 24, 32 bit audio formats with minimal THD+N ratio (0.002%) and ideal dynamics (114dB+), plus amazing sampling rates of 384kHz

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

      Using the I2S expansion port on the C2 / C1+, we save a USB port and allow the user to select their audio playback system of choice, such as Volumio, Debian(DietPi) for HiFi audio playback.

       

      Functional introduction :

      1. Volume control via I2C interface is great feature to keep the great audio quality with various audio output volume.

      2. The output ports include gold-plated stereo RCA terminals

      3. 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.

      4. The I2S interface allows for direct decoding of the digital input to analog output using master clock synchronization.

      5. The PCB surface is comprised of gold-plating on top of 2 oz. of copper, ensuring signal continuity and reducing signal reflection and refraction.

      6. Balanced(differential signal) audio output soldering pads are available.

      7. The dedicated S/PDIF interface is newly added which supports up to 192kHz/24bit resolution via new Optical (Toslink) output.

      * ODROID-C1+ supports up to 384Khz while the ODROID-C2 supports up to 192Khz.

      * This HiFi Shield 2 is partially functional on Android. The output format is fixed at 44.1Khz/16bit stereo. There is no Analog volume control capability either due to limited AOSP audio HAL implementation.

       

      – Ubuntu/Linux setup guide for ODROID-C2 : HERE / for ODROOID-C1+ : HERE

      – Official Volumio OS support : https://volumio.org

      – Official Runeaudio OS support : https://runeaudio.com

      – PCB mechanical drawings (AutoCAD format) : Download HERE

      – Schematics : Download HERE

       

       

       

       

      Package include

      – HiFi Shield 2 Board

       

       

       

       

       

       

      BOARD DETAIL

      The audio output is the other way as standard. Red : Left, White : Right

       

      BLOCK DIAGRAM

       

      ODROID-C2 / C1+ 7PIN I2S PINMAP

      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
      Volumio 2.002 image runs on the Odroid-C2 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
      Volumio UI volume : software volume 100 (maximum full scale)

       

       

      Set-up with ODROID-VU5

       

      Set-up with ODROID-3.5inch Touchscreen Shield

       

      The Signal to Noise Ratio (SNR)

       

      The 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

       

      This is a great idea if you want an audiophile set-up with ODROID-C2/C1+. Enjoy a variable output connecting directly into a power amp or active speakers. 

      Hardkernel
      HK-HIFI-2

      Špecifické referencie

      HiFi Shield 2 (Hardkernel) for ODROID-C2 / C1+