Has any body been having trouble using the M6 as a Bluetooth DAC?
I have my M6 connected my HiFi using a cable and set to Line Out, and use an Android tablet connected to the M6 using the Bluetooth DAC mode. It appears to connect ok, tells me I'm connected for audio, and the screen on the M6 changes to "BT Sink Mode (I'm not sure why it's spelled like that!).
However, when I go to play music, nothing. I then have to disconnect the Bluetooth, and try again, sometimes several times. Eventually it works, but it just took me about 20 minutes of faffing about to get it going. When it does decide to start working, it stays working, the connection is good, and sounds great using LDAC.
Perhaps this issue is down to the tablet more than the M6, but it's pretty tedious.
Also, when I realised the M6 could be used as a Bluetooth DAC, I thought this would be good for boosting the audio of movies on my tablet, ideal for flights. However, the audio is unfortunately delayed, rendering the function useless.
Specs, sound quality, price, and form factor tick all the boxes with this device, but for me it's let down by too many niggles and limitations. I'd like to think Fiio are working to fix all the niggles, but I can't help thinking they are focusing on getting more apps whitelisted.