3. DI + amp sim: building the tone without committing
From raw DI to a usable bass tone: Ampire, Helix Native or BIAS FX on top of the DI, what to look for in a bass amp, and why the final tone is decided in the mix.
With the DI recorded and the take locked, you can give it a tone. The key is how: the amp sim goes on top of the DI, as a plugin, not printed into the audio. That way you have a bass that sounds good while you record the rest of the song and, at the same time, you can rebuild the whole tone in the mix without re-recording.
What to look for in a bass tone (rock/metal)
A good recorded bass tone has two halves that do different jobs, and it’s worth listening to them separately:
This is the weight, what you feel in your chest and what holds the song up. If it's missing, the song sounds small; if there's too much, everything blurs and the kick loses its spot. It almost never needs adding: the DI already has it.
This is what makes the bass AUDIBLE on a phone, in a car and on cheap earbuds, where low end barely exists. It's generated by amp distortion and by the pick attack. If your bass disappears on small speakers, this is what's missing — not low end.
How much gain to use
On a bass amp, Gain / Drive isn’t just “more distortion”: it’s how much growl you generate.
- Low drive (clean): definition and punch, but the bass easily gets lost between the guitars.
- Medium drive: the typical rock/metal spot. Keeps the body and adds audible harmonics.
- High drive: sounds aggressive and present, but starts to lose low end and to sound like a small guitar. That’s where splitting the bass into two layers pays off (next section).
Reamping: changing the tone later, without re-recording
Because the DI is untouched, at any time you can:
- Change amps or presets (Ampire, Helix Native, BIAS FX) and compare which one sits best with the guitars you already recorded.
- Send the DI back out to the physical Helix through an iD44 output and re-record the processed signal, if you want a preset that only exists on the pedalboard.
- Rebuild the whole tone during mixing, when you already know how the guitars and drums sound.
Bass tone is the most postponable decision of the whole stage, because the DI leaves it completely open. Set something that lets you play and hear yourself in context, and move on: the final tone is chosen in the mix, with the whole song playing.
A working preset: good enough to move on
Don’t chase the final tone today. Load a bass amp with medium drive, lows and highs at noon, and keep recording the rest of the song. A reasonable “working” tone is enough to make every decision that comes next; the final polish happens once every instrument is in.
Common mistakes
What you should NOT chase yet
Quick route — a working tone in 5 minutes
Quick path
- Insert Ampire (or Helix Native / BIAS FX) on the DI track, without printing it.
- Pick a bass amp and leave the amp EQ flat.
- Raise the Drive until you hear some growl without losing body (medium drive).
- Listen to it WITH drums and guitars; adjust only until you can hear it in context.
- Keep recording. The final tone is decided in the mix.
Expected result
Expected result
Your DI with a working tone on top: a bass you can clearly hear in the context of the song, with body down low and some growl in the mids, and the DI untouched underneath so you can rebuild everything whenever you want. With that covered, the next step is the trick that makes bass work on every speaker: splitting it into two layers.