Splitting stereo into two mono signals

[guibot]

During these quarantine days I wanted to catch up with the Axoloti and I decided to go for an Eurorack module for effects processing, and probably I will build another module with oscillators.

As the title says, I'm splitting both line in/out signals, into two mono female jacks and I'm definitely doing something wrong. It happens that if I feed a mono jack into let's say Left channel, I can listen to the same audio on the Right channel but it is very degraded/saturated.

This is how I am connecting

I tried to use the LIN+ and - RIN+ and - and is exactly the same.

This is just my testing patch

Any tip or workaround is much appreciated!!
Cheers

[tele_player]

Your diagram does not indicate which pins are connected at the mono ends. It’s important.

[guibot]

Thanks so much for taking the time to read my post!!
I tried to be as most specific as possible, sorry if I missed any information.

The diagram shows how I managed to connect the two mono's to one stereo.
I have split one stereo cable into two mono's.

[tele_player]

The details that I don't see in the illustration, and can't be certain of from the photos, is this:
-the TIP from the 1/4" stereo plug must go to the TIP on one 3.5mm jack.
-the RING from the 1/4" stereo plug must go to the TIP on the other 3.5mm jack.
- the sleeve from the 1/4" stereo plug must go to the sleeve on both 3.5mm jacks.

I tested here that a stereo audio signal passes through Axoloti correctly, without distortion.

[Blindsmyth]

I would recomend soldering pin headers into the holes after the jacks (like you did with the gpios) They are quite clearly labelled.
t = left channel
r = right channel
s = ground

note that they are in different order there though: rts

P.S. I do a lot of splitting. From my testing experience there will be a minimal amount of bleed but in practice I never noticed it.

[guibot]

thanks so much for helping me with this, it is being quite a struggle but I am glad to know that at least I am doing/soldering everything correctly, I will perform more tests during the day and will let you know

I will breakout out the mini-jacks into pin headers for better debugging

[tele_player]

Just to verify your Axoloti is working correctly, try a TRS to TRS cable, running the audio output of a stereo device through Axoloti, for example, your computer's audio output. If this works correctly, your wiring is the problem, If it doesn't work correctly, it's the Axoloti.
Have you ever used audio/inconfig objects - perhaps you've misconfigured the codec input? These settings should rarely need changes from default, and are saved in flash , if I recall correctly.

[guibot]

I was doing something wrong, now everything is working as expected, signals are clean, I also tried with the TRS cable splitting, and with the R and L header pins. This is also a much cleaner solution inside the rack.

Now I can replicate this and have an Axo dedicated to signal processing and another one with oscillators.

Thanks so much for helping!!