Anyone has heard the Bel Canto REFLink Asynchronou

That is very useful information. I am quite eager to have a chance to listen to it.
Thanks again.

I ran into this on the web:

“While the e.One DAC2.5 sounded exceptional with 16/44.1 recordings, it was no surprise that it sounded even better playing hi-rez files. It recognized 24-bit data at both the 88.2 and 96kHz sampling frequencies. (It can accept sampling frequencies up to 192kHz through its S/PDIF inputs, but I had no such files on hand.) ”

That made me wonder: 1) how can I find out whether the music stored in my computer have a sampling frequencies higher than 96kHz? ; 2) Assuming that I have such files, wouldn't it be more convenient and less costly to use the S/PDIF inputs instead of buying the REFLinks for USB input? Can we even use S/PDIF inputs from a computer? Please enlighten me!

In fact, I am looking everywhere in my files and it seems that I don't have anything higher than 16bit data at 44kHz! What is wrong with me?

The REF Link is a USB-SPDIF converter.

A smaller/less featured USB-SPDIF converter is built into the DAC2.5

The external uLink mLink and REFLink provide some form of isolation of the noisy computer signals from the DAC itself. One end plugs into the computer's USB port, the other is a SPDIF type connection to the DAC (coax/optical or AES).

Besides the isolation, the new external devices also provide
a. asynchronous USB protocol (less prone to jitter)
b. 24/192 support that matches the SPDIF input capability of your DAC2.5

If you don't intend to upgrade the DAC2.5, I think it might be more cost effective to look at the lower end devices from Bel Canto

If I understand you correctly, isolation if one part of what this converter does, the other one is allowing frequencies higher than 90kHz. So if I all my files are 16bit data at 44kHz, there would be no point in getting such converter and I would be much better of by buying the lower end device to get some isolation. Is that correct? That is how I understand you last sentence.