Reddit reviews Hosa CYX-405F Camcorder Microphone Cable, Dual XLR3F to Right-angle 3.5 mm TRS, 5 ft
We found 1 Reddit comments about Hosa CYX-405F Camcorder Microphone Cable, Dual XLR3F to Right-angle 3.5 mm TRS, 5 ft. Here are the top ones, ranked by their Reddit score.
1/8" Angled TRS male-dual XLR FemaleY cable5' Long
If that means it will only pay attention to the 'left' signal, then yes. However, if it sums the two inputs together, you wouldn't record anything at all.
A better solution may be to get a proper adapter cable that is designed to take two XLR balanced signals and combine them in stereo to one unbalanced TRS connection. You wouldn't need the 'right' channel, obviously, during mono voiceover recordings, but you'd have the option in the future if you are trying to capture a stereo source. Here's a link to an example: https://www.amazon.com/HOSA-RT-ANGLE-3-5-LENGTH/dp/B000068O5K/ref=sr_1_fkmr2_1?ie=UTF8&qid=1506093409&sr=8-1-fkmr2&keywords=2+xlr-f+to+1%2F8%22+trs
Either way, it does make more sense to record a voiceover in mono, but just make sure that if you're doing it with your current adapter you consider the two scenarios at the beginning.