Reddit reviews Hosa CMP-303 3.5 mm TS to 1/4" TS Mono Interconnect Cable, 3 feet

That's a balanced input so instead of a L/R signal on the 1/4" plug, it expects the same signal inverted/non-inverted. Any audio that is not playing through both channels at the same time will be cancelled out. Here is an image describing how this works.

You'll want to use a mono adapter cable or plug instead if you're not using a balanced input.

So this came to a surprise to me, just because I haven't had that much experience with this kind of gear.

Here are my notes:

1. Plugging in headphones (TRS) to the volca works fine.
   
2. Plugging in a stereo cable (TRS) to a normal stereo system works fine.
   
3. Plugging in a stereo cable (TRS) to a mixing board = huge amounts of white noise.
   
4. Plugging in a mono cable (TS) to a mixing board = works perfectly.
   
   I don't have enough details, but I think you're connecting your volca (stereo) to a line in (mono) and it's getting messed up because the mixing board is expecting mono.
   
   I figured this out by taking one of my 3.5mm TRS to 6.35 mm TS cable only using the T and it worked fine.
   
   My final solution was to buy a TS 3.5mm to TS 6.35mm cable for each of my volcas and everything works fantastically now.
   
   edit: if you're using a volca sample, which is actually stereo, you'll want to split the TRS to 2x TS and put it into two channels on your mixing board.

Yeah, but any old quarter inch to eight inch converter will do. One of these would work also.

The only difference between the mix out on the drumbrute and the input on the sound card is the size of the plug. The signal doesn't need to be altered in any way, you just need a something with a 1/4 inch jack on one end and a 3.5mm jack on the other.

If you have a 3.5 mm jack or a Lightning to 3.5 MM adapter (And I assume USB C for the new ones?) you can use this cable

https://www.amazon.com/Hosa-CMP-153-Stereo-Breakout-Cable/dp/B000068O3C/

to bring left and right channels unto the UMC. You could plug in a single cable to get just one channel.

To bring a single channel into the interface you could use

https://www.amazon.com/Hosa-CMP-110-Mono-Interconnect-Cable/dp/B000068O3E/

or this

https://www.amazon.com/Hosa-CMP-305-Mono-Interconnect-Cable/dp/B000068O3G/

The one thing you have to be aware of is the 1/4" connection going into professional audio gear from consumer gear HAS to be TS unbalanced or you get distortion.

!

Basically!
Is your gaming PC's motherboard's analog audio input only mic-level, or does it also have line-level?
Regardless, I'm 90% sure that it's mono.

What you need instead of the stereo jack - mini jack cable is a 1/4" to 3.5mm cable. This connects to one of the line outputs on the back of the 6i6 and then goes to your gaming PC audio input for voice comms.


Note that none of this will work as intended until you set up routing with the Focusrite software!
If you have issues, their support team is great.

Another thing you could do with this setup if you're using Teamspeak (or any external voice comms software), is set your game to use the SPDIF output to your audio interface and have Teamspeak use the analog output on your motherboard and connect that into the pair of line inputs on the back of the 6i6. You'd then be recording five channels of audio on your streaming PC, with your voice, your teammates voices, and the game sound all being separate channels so you can mix them accordingly (assuming you're making videos.) As that would be an analog channel of audio your hum eliminator could be used.

If you're using a mixer that has aux sends, you can set up a mix minus using your phone or other device.

You'll need a Headset adapter for your phone. As well as these two cords, Aux to 1/4" mono and Aux to Stereo 1/4".

From here, you can run the Aux to Stereo 1/4" from the Split Headphone Jack into an open channel on your mixer. Run the Aux to 1/4" Mono from your AUX SEND to the Split Microphone Jack from your phone. That way you're getting the audio from the phone into your mix, and using your aux, the caller can hear you without hearing themselves.

This Video could help.

I currently use this TS cable for the tablet and it works.

https://www.amazon.com/Hosa-CMP-310-Mono-Interconnect-Cable/dp/B000068O3G/

well the this is my go too cable then

https://www.amazon.com/Hosa-CMP-303-inch-Interconnect-Cable/dp/B000068O3G