Firmware 13.2.0 - DOS 2.2.6 for Expert Pro - Release note

[Axel]

@Axel

To respond to your question first, yes the Devialet does have 2 way USB functionality but the incoming signal it is currently capable of dealing with is music playback so it would seem that the input goes to the DAC. I'm not certain whether it would take software additional to the room correction software in order to enable a mic input to be passed to room correction software for analysis and input into the correction calculation process.

And that in a way is the difficulty in relation to your first question. We don't know what the capabilities, and more importantly, the limitations are for the processor and storage in the current Expert Pros. My understanding is that the limit for the SD card slot and reader is 8 GB which isn't all that much these days and we also don't know what the read speed capability is. Using the card the way it is currently used, for access to relatively small text files for configurations and also relatively small files for the OS and FW (a total of 62.3 MB for the current OS/FW) isn't going to require much in the way of access speed. A  lot may depend on what you use the SD card for and we don't know what Devialet would need to do to the FW and OS if they were going to change the usage of the SD card in the way you suggest.

I'm also a little cautious about using the SD card for something more critical than config files under normal circumstances because I had a problem with my SD card slot last year when my 140 Pro stopped reading cards and needed to go back to France for repair. I could have continued to use it with the factory config but the real problem was that I was no longer capable of installing updates. I'm not certain the SD card is a good storage option for "mission critical" functions.

I'm also not certain how confident I would be about adopting a Devialet room correction software function given that they had a serious bug with Roon Ready capability and some seem to think that it still is not completely solved, and given that Sweet Room doesn't work properly if you're running SAM and given that SAM is a major point in Devialet's technology claims, the fact that they released Sweet Room in a state unable to function properly with SAM and seemed unaware of the problem doesn't exactly inspire confidence.

I think the big priority for Devialet right now is making sure the current OS and FW software is actually bug free and fully functional for all advertised functions. If they can't manage that, then they probably can't manage a significant OS and FW rewrite to accommodate some pretty intensive new software functionality without introducing new problems and I think it's time they actually managed to give us a software version without problems before they try doing anything else.

But on second thoughts...
With a firmware update it may be possible to use the USB input for mic. measurement.
I’m not certain that the all sing all dancing CI board wouldn’t be capable of using the SD card as extra memory and that a FW update wouldn’t be capable of raising the 8GB limit.
I’ve never had a problem with my SD card slot and assuming that Ethernet/wireless configuration were possible, and that Devialet could configure the SD card to be used as extra memory, the SD card would only need to be inserted once. Fit and forget.
I’ve never had a problem with an SD card in any of my cameras where multiple read/write operations have been performed, so I see no reason that it shouldn’t be up to the task of simple memory extension. I also don’t see a problem with read/write speeds as the DSP information would only have to be read once at boot up.
Devialet could and probably will address the SAM/dual mono bug and as for the Roon Ready bug I have to say that I don’t have any problems in that area. I think that Devialet rely on us as beta testers for buggy software; we just don’t know it! 
I actually think that Devialet are capable of great things. They’ve already delivered a groundbreaking series of amplifiers and technologies and if only they’d pull their digits out of their fundaments on the soft/firmware front and apply themselves to the issues at hand , I see no reason that most if not all of what I’ve suggested could be achieved.