Bluetooth receiver to vintage amp (Logitech adapter with a Pioneer Sx-580) - advice?

[gr33nhorn]

I've noticed that most BT recievers benefit greatly from having a tube buffer add some magic (and mask some of the digital artefacts)
https://audiokarma.org/forums/index.php?threads/fx-audio-6j1-tube-preamp-a-31-wonder.848535/
this works pretty decently

 

[billyz]

I have used several Bluetooth audio grade receivers but have found the Apple Airport Express to vastly superior audio fidelity.

 

[mgrisoli]

A little step down SMPS. Can be bought for peanuts.

Nah, problem solved with a few tweaks in the voltage regulator.
Now it doesn't heat up and even the noise is gone.
Works beautifully.

So, I have a question though, if any of you have ever tried this...
What would be a smart way to share an input with the BT device?
I connected mine by soldering the audio wires to the back of the PLAY jacks of the TAPE1 input, but that makes TAPE1 exclusive for BT.
What I would like to do is to share the input with another device that is also connected to Tape 1 play input through the RCA jacks.
It could either mix the sound of both devices but just ignore the bluetooth when something else is connected there is tottally acceptable.

I don't even know what to call a circuit like this, so I am having a hard time to search for it.

Any ideas?

M

 

[rickl]

What would be a smart way to share an input with the BT device?

no idea if this is a smart way but didn't you just plug in something in the Tape 1 input? if the BT is off, i'd think the Tape 1 source would play. if BT is paired and playing, the sound is blended or mixed with the Tape 1 source (or just the BT source if the device connected to Tape 1 is not playing anything).