G: To make a normal karaoke track feel more “metal” with only the mixer/EQ tools a KJ usually has, you’d be leaning into the same sound-shaping tricks metal producers use, just in a simplified way:

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1. Bass / Low End

• Push up the low mids (100–250 Hz) more than the deep sub-bass.
• You want punch and body (kick drum, bass guitar), not rumble that will muddy vocals.
• Too much below ~80 Hz will make it boomy and messy.

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2. Guitars / Midrange Bite

• Boost the high mids (2–4 kHz) slightly.
• That’s where distorted guitars “bite” and where metal gets its edge.
• Don’t overdo it, or vocals will sound harsh.

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3. Treble / High End

• Add a touch of presence around 6–8 kHz for cymbal shimmer and aggression.
• Avoid pushing the very top end (10 kHz+), since that just makes it hissy.

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4. Compression / Dynamics

• If the system has a compressor, use more compression on the music track.
• Metal feels heavier when the volume floor is lifted and peaks are squashed—less dynamic swing, more wall of sound.

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5. Vocal Settings

• For your voice, ask the KJ to:
  • Add more gain and compression than usual so it stays on top of the loud backing.
  • Use reverb sparingly (metal vocals tend to be drier than pop karaoke).
  • If possible, add a touch of delay instead of reverb—short, slap-back style gives aggression without washing it out.

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6. Balance

• Bring the backing track volume down slightly compared to your mic.
• Metal works better when vocals sit on top of the chaos, not drowned in it.

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💡 Quick shortcut for a “metal” setting:

• Bass +2
• Mids +1
• Treble +2
• Compression moderate to high
• Reverb low

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Would you like me to give you a “preset recipe” phrased the way you could literally hand it to the KJ (“set bass to +2, treble to +2, cut reverb, add compression”)? That way you wouldn’t have to translate the audio theory at the booth.

G: Good plan — the exact interface (e.g., TouchMix, Behringer X Air, Yamaha StageMix, Soundcraft Ui, etc.) will change what you can tweak and how.
Once you know the model or app name, I can give you an exact walkthrough — like which faders, EQ bands, or compressor settings to touch and what values to try.

For now, the main translation principle is:

Anything labeled “punch,” “presence,” or “drive” → increase slightly.
Anything labeled “warmth,” “reverb,” or “space” → decrease slightly.

That alone will make a pop-karaoke track feel heavier and tighter until we can get precise.