Thanks but I know how to get to developer options. As I noted in my original post, nothing I do in developer options seems to stick. Usually there is a setting in the specific Bluetooth device settings (in the Bluetooth connection menu of the phone) to enable LDAC but I don't see it on the V60. Wondering if anyone with a V60 has the same issue or knows how to fix it. I have no issues with LDAC on my S9 with the Qudelix 5K.
EDIT: I finally got around to digging up my ES100 (had an electrician here trying to help me get my air conditioning running again) and LDAC works fine on the V60 with the ES100 and the Qudelix 5K is able to connect to my S9 via LDAC so I am guessing it is a compatibility issue with the V60 and Qudelix 5K. Will try posting on the 5K thread to see if anyone there has noticed this as well. Thanks for taking the time to try to help.
Qudelix finally got their hands on a V60 and they figured out the issue. I now get LDAC 990 with the V60 and it sounds great. Apparently, the LG V60 remembers the last codec used for a device and I guess they (LG) did not anticipate a situation where aptX adaptive would have unknowingly been used first and that somehow locked me out of using LDAC with the same bluetooth device. I fixed it by disabling aptX adaptive on my Qudelix 5K, turning off the 5K, unpairing the 5K on the V60, turning 5K back on and re-pairing the 5K to my V60 with aptX adaptive still disabled. Then I went into Bluetooth settings for the 5K (in the V60 connection settings) and the Connection Type menu was now available so I was able to enable "Best sound quality" for LDAC. Have not had a single hiccup in SQ or connection quality since. Here is the response Qudelux sent me (posted on their official forum):
"We finally got the LG V60 in our hands.
As we checked, it seems LG V60 remembers the connected device supported codec list.
Please follow the steps below.
5K App --> Codec --> Remove/Uncheck aptX Adaptive
Reboot 5K.
Remove/Forget the 5K out of V60 paired device list.
Repair 5K to the V60.
Then, you will see the LDAC HD Audio option in Bluetooth paired device setting.
Hope this helps you.
Thanks!"
Posting this here since it looks like this can happen with any device capable of both aptX adaptive and LDAC (not specific to the Qudelix 5K) and is a pretty easy fix. Really loving the Qudelix 5K and their customer support.
Also, the V60 has been a significant upgrade from my Galaxy S9 and the LDAC connection quality has been flawless for the last hour I have been using it. My GS9 would skip whenever I even opened a new app or window