TRRS is what the iPad uses for mic input and stereo output like in the typical corded apple earplugs (with a mic). The other end of the cable that goes to your mic is most likely a regular TRS. If you use a regular 3.5mm TRS on both ends, the audio will not be routed to the input of the iPad.
But yeah, a camera connector kit or a cheap audio interface will be a better and more robust solution.
The iPads jack input/output can be used to record a signal but you’ll need to connect to the pad with a TRRS cable. This is how the mics that plug directly to your headphone socket work. You may also need a special cable to have a line level signal to work but I haven’t tried this myself. Check out this blog post.
I assume you are using some kind of usb mic with a headphone output? In this case I would instead connect the mic directly to the iPad with a camera connector kit or usb c if it’s a newer iPad. If you must use the headphone output, you will need a trs- trrs cable such as a Rode SC7 but this may not work as intended with the signal levels from the headphone out jack of your mic.
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I’ve been playing Kingdom Come: Deliverance (2018) for the past month or so. Haven’t been this immersed in a game world in a long time. Sure it’s a bit janky at parts and gets a while getting used to, but the world is beautiful and the attention to history and realism is incredible!