Best use of Hypex Fusion Modules

[Bebelalu55]

I have a project building a pair of powered loudspeakers using the Hypex modules after having watched this:

My unique source of music is a Lenovo PC with Daphile, therefore using USB as output.

When looking at the Hypex bloc diagram, I have the choice of:

1) using the analog input which means I would have to use a DAC with volume control (SMSL D-6S ?).
But there would be another AD conversion in the Hypex before feeding the DSP.

2) using the digital input but I would need to find a USB to SPDIF converter with a volume control or use the volume control in Daphile and loose the Bit Perfect option.
In this case, the Topping D10s could do the job.

Any thoughts?

As a side question, any reason why there is a DAC between the DSP and the Class D modules? Can't we stay in the digital domain (PCM to PWM possibly?)

 

[staticV3]

Any thoughts?

I'd use digital whenever possible.

As a side question, any reason why there is a DAC between the DSP and the Class D modules? Can't we stay in the digital domain (PCM to PWM possibly?)

Hypex's Class D modules do not support digital input.

Class D ≠ FDA.