|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.
- Ubuntu/Linux setup guide for ODROID-C2 : HERE / for ODROOID-C1+ : HERE
- Official Volumio 2 OS support : https://volumio.org
The audio output is the other way as standard. Red : Left, White : Right
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.
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.