Hard question to answer - it's dependent on the singer. I would start with...... nothing, other than high pass filtering the singer right at the mic, if the mic has a HP switch - use it.

I personally don't think you can make EQ recommendations for voice to 'bring out' any particular tone. You have to be really careful with it because the vowel formants will really light up if you cross into some area where you've boosted frequency content.

How about record and post first then ask if folks have some EQ recommendations for the particular voice/song?

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