It didn't mentioned about whether records his voice or someone else. So answer is vague.
A man who records voices
~ 오디오 엔지니어
that's audio engineer. It may literally be a man that records vouces, but the general concern is how, in this instance, it is specified that the man is recording his own voice.
• A man who records voices = 목소리들을 녹음하는 남자
• A man who records his own voice = 자신의 목소리를 녹음하는 남자
• A man who records the voice = 그 목소리를 녹음하는 남자
• A man who records a voice = 한 목소리를 녹음하는 남자
A little info here-
Very helpful. Thanks.
When do we use 목 vs 인후 for "throat"? Are they interchangeable?
"The" man recording his voice. <= Not accepted.
"A" man recording his voice. <= Suggested.
As far as specifics, a man is correct. As far as usual korean speaking, yes it doesn't matter whether it's a man or the man
the man who records his voice - accepted 17Oct 2018
A man records his voice- not accepted
"A man records his voice." is a full sentence with Subject + verb + Object
= 남자가 (자신의) 목소리를 녹음합니다.
"A man recording his voice" or "A man who records his voice" is a phrase with a Noun + relative clause (acting as a determiner)
= (자신의) 목소리를 녹음하는 남자