Easiest way to play music on stream&not on VOD?

[borntosowdeath]

My setup is Rodecaster Pro + Realtek soundcard + can stream music from my phone.

I tried to use Rodecaster's TRRS/Phone input, but it is downmixed to WDM Microphone - I cannot play with other people and stream music this way. They could get DMCA'd, because the TRRS slider on Rodecaster is the level of music they hear through my mic when I'm speaking.

I have a temporary solution that plays the music to the stream, but I cannot hear it

When I try to monitor Realtek device in the OBS - the music is downmixed to the Rodecaster's USB (so I would not be able to save game sound on VOD).

Is there any simplier way? Am I missing something? I would not like to use Voicemeeter as it adds some latency.

Basically all I need is:
1. To put music in channel 2 in OBS (ASIO/Rodecaster/Realtek)
2. To have different sliders for me hearing the music and the audience
(the 1st way with the TRRS was close, but the microphone downmix is a no-go).


Here's the VOD from yesterday:
[PL/ENG] Apex? Testing 120fps again. - Twitch
As you can see the music is played and it's not heard in the VOD, but I could not hear it myself as well.

 

[borntosowdeath]

EDIT: Now my PC sound is downmixed with the WDM mic audio... FML

Well... I think I found the way.

Set default audio device to Realtek - wire it directly from PC (green) to Rodecaster (Phone/TRRS) - good I had this on hand:
GROUND LOOP ISOLATOR W/3.5MM PLUGS - PAC (pac-audio.com)

Play the music on Rodecaster.

There's no monitoring set in the OBS advanced sound settings - everything is done with hardware.

And now I use my
physical slider for PC volume (Phone/TRRS interface in Rodecaster)
physical slider for Music (USB)
physical slider for Mic 1 (Mic 1)
(Those are for my hearing)

The audience hearing I can adjust in the OBS directly without any interference with the ones above!