DX5 II version V1.91 firmware update
6. What's updated
*Adjustment: Extended the long-press duration for the C1/C2 buttons on the remote control to 3 seconds before triggering the save function.
*Fixed: Resolved the occasional failure to wake up the device via button press when in standby mode.
*Fixed: The occasional unintended wake-up of the device when in standby mode.
*Fixed: Several other known issues.
If people download/install this FW, please verify the following issue (since this is officially released):
During the last few weeks, I have had beta/test FW on my DX5 II (a couple of v1.88 FWs and
@Bauhaus provided me with the v1.90 beta FW just yesterday), and the last issue I am certain they haven't fixed in this update is an audio hiccup that is reminiscent of the hiccup you may encounter using SPDIF Mode 2. It is an intermittent one, so it requires some close attention to catch. It also only applies to the OPT -- and probably COAX -- input (since those are the two SPDIF inputs).
This will not happen using USB or BT inputs. This can probably be tested if you have some kind of output device (CD player/transport, perhaps) to connect to the OPT or COAX inputs, but if you are able to use a USB DDC in between your computer, and DX5 II like I do, I think that would be more ideal (so,
@JIW can test in this manner with your SMSL PO100) as I do not know what happens if you do Step 2 below using a CD transport/player. The ideal connection chain in that case would be:
Computer >> USB >> DDC (like a Topping D10s or SMSL PO100/PO100 Pro or some other device that has a USB input/OPT or COAX output) >> TOSLINK or COAX >> DX5 II
Steps I have used to test/reproduce are:
1. Connect a source to the OPT or COAX inputs on the DX5 II, set it to the corresponding input (OPT is probably easier for most people?), and choose any output (I recommend either HPA output because it will be easier to catch the issue)
2. To ensure that the issue triggers, press either the C1 or C2 buttons on the remote (I would advise you to save your settings to either of those preset buttons first so that you don't have to redo everything afterwards). If you're using the same connection as I've cited above, doing this causes the DX5 II to momentarily disconnect from the computer and is an important step to cause the issue to trigger. If you have never touched the SPDIF Mode setting, then this step may be unnecessary, but doing it does result in 100% reproduction IME.
3. Listen to music from any source (either local files or online through Bandcamp)
Because this issue is intermittent, it may take some time before the hiccup occurs, so be patient. I have personally had it happen within 30 seconds, but sometimes up to 5+ minutes before anything happens. I have even had it happen twice within a 4-minute song. It's probably best to select music you are very familiar with to better catch it, but I think the more energetic the music, the more obvious the hiccup.
If you do encounter the hiccup, the "fix" is to go to the SPDIF Mode setting, and switch it back and forth from the default 1 to 2 and back to 1 again (wait for the relay clicking sound each time to be sure) -- hence why this will not happen with the USB or BT inputs. This will not universally "fix" it, though. If you switch to a different output type (for example, switching from HPA BAL to HPA SE or from either HPA to any LO option), you need to do the SPDIF mode switch again. Once it has been done on the chosen output type, the hiccup will no longer occur unless you press the C1/C2 preset buttons on the remote again.
This is what I have observed on the test FW, and I doubt Topping has addressed this since they have expressed some difficulty in reproducing up until yesterday. If people can check this with v1.91, I would like to see if anyone else has this experience. And if it turns out to be a legit bug, I would encourage you to report this to Topping.
