Ok, I now understand that a .vce (or .sar, etc) is a file that includes the MSB.LSB.PC of the original sound preset and a series of sysex and controls that modify the sound.
There is no memorization of these sounds in the memory of the machine as an independent sound and therefore no attribution of MSB.LSB.PC
I read this post on this forum:
https://www.psrtutorial.com/forum/index.php?topic=57501.0I've only had the DGX for 5 days and this is my first Yamaha arranger!
It's completely different, and therefore a little disturbing for me, from the machines I know.
For example on my PA4X user sounds are saved in the memory of the machine in the section (msb.lsb.pc) 121.61.0 to 121.69.127 and 120.64.0 to 120.66.127 for drum kits.
And on my Montage the user sounds (performance) is in the range 63.32.0 to 63.36.127 or 64.32.0 to 64.36.127
However, I used user sounds on my DGX in a style and it worked.
I used user sounds on my DGX with the built-in sequencer and it works.
With a DAW I send the user sound through a registration at the beginning of the recording and it works.
What confused me at first was when I wanted to check the sound, thanks to "Mixer/Eq", it showed me the original Preset sound.
I now understand why.
Anyway, thank you all for your replies.
This forum is very responsive and informative.