Aqua Acoustic Quality, of Milan Italy have released a new updated DAC, the Formula xHD. The Formula xHD features the following upgrades and modifications as compared to the Formula DAC:
–    New firmware release 3.0 for the main FPGA (DAC) with optimisation of the code
–    New USB board with hybrid architecture cod. A108


Proprietary hybrid 2-stage XMOS xCore XE216 + FPGA
Fully-floating (isolated) USB decoding and clock generation by FPGA with proprietary code
High quality, long life, low noise parts and modular design that distinguish aqua acoustic quality equipment
Sample rate in ?Bit Perfect? up to 768 kHz PCM and quad rate DSD (DSD256)
Latest version of customized XMOS X Core Driver on Windows OS (W7, W10)
Native X Core Audio on Mac OS (Bit Perfect)
USB Audio 2.0 operation on Linux (Bit Perfect)

This update has required significant optimisation of code for the main FPGA of R2R ladder DAC. The new hybrid USB XMOS xCore 200 (dual core) + FPGA circuitry enables the high-resolution file playback up to 768kHz PCM and up to DSD256 (Quad DSD)

The update for the Formula units of existing owners consists of the following hardware / firmware modifications:

1. new hybrid USB Board cod. A108 (high-resolution up to 768kHz PCM and DSD256 (Quad DSD)

2. hardware modification of board P1108 connected to USB board

3. new firmware of main FPGA (R2R ladder DAC) with optimisation of the code

4. update of firmware of main microcontroller STM32





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