As a development of DXO4 crossover
Software will be based on Graphic Filter Designer
or whatever platform will come in future.
DSP motherboard structure:
Various options for boards:
(color represents standartized pinout and placement of modules on the motherboard)
The boards could be reused for standalone DAC and ADC projects by chaining them together in following ways:
8ch I2S input module could be used with Envy24 soundcards by tripping their I2S bus
which should be considered on design stage, prior to splitting the clocking duties over blocks:
Both local, external, and ASRC-mixed implementations should be available, with sync/async receivers and ADC.
I2S (LJ with one BCLK delay = classic I2S) 16/24bit data path with 256fs masterclock were chosen by looking at the following datasheets:
All of them accept I2S format with 256fs mclk. No issues here with Envy24-based cards, as they are at 256fs MCLK and I2S too.
AD1955 was discarded, as it requires SPI configurator to work.