#17B. HdmiPi Pro III New Flagship SYNC mode I2S/DSD over HDMI Transport Interface

Introduction
HdmiPi Pro is a dedicated I2S/DSD over HDMI transport interface board. Compared with all other solutions, it is the first one that uses discrete 1-bit LVDS drivers to achieve the highest HDMI signal quality and lowest noise levels. And it also integrates the well-reputed 1-bit discrete secondary re-clockers (similar to a ReClockPi) to ensure the best possible low-jitter performance. HdmiPi Pro is so far the flagship HDMI transport interface board for audiophiles to improve the sound quality of an external DAC to a higher level. HdmiPi Pro works in SYNC clock mode so it will need a FifoPiMa, FifoPiQ7 or Q3 to operate.

HdmiPi Pro III is the New Released latest upgraded version of the HdmiPi series, featuring improved performance, enhanced signal integrity, and several new features. It is designed to provide an exceptionally clean and stable I2S/DSD over HDMI interface for high-performance digital audio applications.

Highlighted Features and Specifications

• Discrete 1-bit LVDS drives to achieve the best possible LVDS signal quality and the lowest noise levels
• Built-in the well-reputed 1-bit discrete secondary re-clock stage
• Enhanced high bandwidth power supply filtering networks
• LDO free design to make it directly use the 3.3V ultracapacitor or battery power supply for the best power supply performance
• Could be so far the best I2S/DSD over HDMI streamer transport interface
• Optimized PCB impedance control for the high speed LVDS signals
• 4 layers PCB design with dedicate shield layers to eliminate EMI noise
• Metal film ultra-low noise resistors to ensure the lowest possible noise level
• Pure sync mode works with FifoPiQ7, FifoPiMa or FifoPiQ3, Q7 or other re-clockers.
• Capable of I2S music up to 1536KHz
• Capable of native DSD music up to DSD1024

• Configurable HDMI format setting switches, works with all I2S/DSD over HDMI input DACs, even they are not compatible with the standard PS Audio format.
• Dedicated MUTE/DSDEN control connector that can be connected directly to the FifoPiQ7II and later versions.
• Mounting bracket for the HDMI connector.

HdmiPi Pro III New Features and Improvements

• New Low-Jitter Clock Drivers
  Equipped with newly optimized clock drivers that achieve approximately 50% lower additive phase jitter compared with the previous version, providing the potential for further improvements in overall audio performance.
• Optimized for Full Fs Frequency Range
  The signal path has been carefully optimized for high-speed signal integrity across the full supported Fs range, such as PCM 768 kHz and DSD1024. This ensures reliable signal transmission and stable operation even under the most demanding high-resolution audio conditions.
  
• Additional U.FL MCLK Input
  An additional U.FL MCLK input socket is located on the bottom side of the PCB, allowing the use of an ultra-short 2-inch U.FL cable. This makes it possible to minimize the MCLK signal path and potentially achieve further clock performance improvements.
• Enhanced Local Power Supply Filtering
  Enhanced local power-supply filtering networks feature ultra-low-ESR capacitors and high-bandwidth filtering to achieve the lowest possible power-supply noise floor and provide cleaner power to critical circuits.
• Selectable HDMI Power Supply
  The HdmiPiPro III features providing power supply to the HDMI receiver directly from the HDMI cable. This feature can be enabled or disabled using the S3 jumper switch, providing greater flexibility for different system configurations.
• Larger PCB with Improved Silkscreen
  A slightly larger PCB provides additional layout flexibility, while improved silkscreen markings enhance legibility and ease of installation and configuration.
• Precision Manufacturing
  Manufactured with precision engineering and careful attention to detail to ensure a high level of hardware quality and consistency.

User's manual

TransportPi Comparison

https://github.com/iancanada/DocumentDownload/tree/master/HDMIpi/HdmiPiPro