Devialet and MQA

[thumb5]

@petrik Is correct.  See link below which mentions "Expert internal native PCM 40 bits / 384 kHz format"

https://www.devialet.com/media/wysiwyg/d...warev8.pdf

I recall that this information used to be on Devialet's website, but only mentioned for duel mono units, so it was never clear if this is for all ADH implementations or dual mono only.

@David A mentions that all inputs are upsampled to 24/192.  I can recall being told exactly the same thing, but how exactly this relates to the 40 bit 348 kHz statement is not clear.  Another curiosity here is that the USB input can accept 32bit / 192kHz, although quite what the use of a 32bit input is I am not quite sure.

I hope I'm not taking the discussion too far off topic again...

For what it's worth, I'd understood the 40-bit/384 kHz specification to refer to the format used by all the DSP going on inside the Expert amps, presumably including ADH.  SHARC DSPs use a 40-bit extended-precision floating-point format (and have 40-bit registers) so this word width is a natural choice.  That suggests all inputs, analog or digital, are eventually scaled and up-sampled to this internal format and sampling rate so that they can all be processed by the same DSP pipeline and code.