1. Signal chain and levels
Bass through the iD44's Hi-Z input, why bass needs more level care than guitar, and tuning in the low register.
The bass is the instrument that forgives the most in tone and the least in level and performance. The good news: there are almost no tone decisions to make right now. What you record here is a clean, well-leveled DI locked to the drums; the body, the growl and the saturation are built later, in the mix, on top of that same DI.
Your signal chain
The bass goes into the instrument (Hi-Z) input of the iD44, same as the guitar, and is recorded in mono. A passive bass has a high-impedance output that needs that input: plug it into a line input and the instrument sounds thin and dull — and that can’t be fixed later.
Always record the DI, no matter what
With bass the rule is even stronger than with guitar: the raw DI is the master of the instrument. With it you can change amps, rebuild the clean/saturated balance, reamp and even replace the entire tone without playing again. If you only record the processed bass, every tone decision is frozen.
If you use the Helix or BIAS FX
Both have bass amps and work perfectly. Two ways not to commit:
- As a plugin: record the DI and apply Helix Native or BIAS FX on top. Change the tone whenever you want, with the mix playing.
- Helix over USB: send the unprocessed DI over USB (Global Settings → Re-amp Src) at the same time as the processed tone. You get both tracks in a single pass: the safe one and the one that already sounds good.
Using the wrong input (line instead of instrument) ruins the signal at the source: the bass loses low end and presence, and no plugin brings it back. And saving the DI costs nothing now.
Level: bass clips earlier than you think
Aim for peaks between −12 and −6 dBFS, same as guitar, but with more care. On bass most of the energy is in the low end, which is what pushes the meter, and on top of that the pick attack generates very short peaks well above what you actually hear. It’s very easy to have a bass that sounds moderate and is clipping on the attacks.
A clip in the DI is permanent damage, and on bass it sounds especially bad: a clipped low note turns into a harsh click that can't be removed. Level is one of the very few things you MUST get right at the source.
Tuning: the low register hides it, it doesn’t reveal it
An out-of-tune low note isn’t perceived as “out of tune” but as mud, or as a note that doesn’t lock with the kick. That’s why bass asks for more discipline than guitar:
- Tune with Studio One’s Tuner before every take, string by string.
- Check the intonation in the high frets: if the bass tunes fine open but is off at the 12th fret, the instrument needs a bridge adjustment.
- Dead strings: a bass with old strings has no attack and no upper harmonics — and that’s exactly what later makes the bass audible on small speakers. If they’re months old, changing them pays off more than any plugin.
Check your take
Load your bass DI and look at two things: that the peak lands in the ideal zone without clipping, and that the spectrum shows energy down low but also some above 1 kHz (the pick attack). A bass that is just a low hump in the spectrum will vanish on a phone.
Recording monitor
Play a signal or load your own DI/take and look at the level and the spectrum: that's how you know whether your take was recorded well before moving on to the mix.
- •Level — the peak should fall in the green zone (−12 to −6 dBFS): strong, with plenty of headroom.
- •Clip — if it touches 0 dB (red) there's digital distortion: lower the interface gain and re-record.
- •Spectrum — a metal rhythm guitar has body in the low mids and energy at 2–5 kHz; very high “fizz” gets tamed in the mix.
🎧 Audio to processChoose which sound goes through the effect:
🟩 Ideal zone: −12 to −6 dB. Avoid touching 0 dB (clip).
Guide-song bass DI (for this section)Pending — this one is on you
These parts belong to the guide song: the same 110 BPM track in E minor whose guitars you already recorded. What you upload here gets reused to build the full song and hear its evolution (raw → mix → master).
I need you to record and upload to prodmus_frontend/public/audio/bajo/ the raw DI of each
part (no amp sim) and, if you want, a version through Helix or BIAS FX:
- Verse — bass with a pick, following the guitar’s palm-muted riff, 110 BPM, 4 bars.
- Chorus — bass holding up the wall, the same bars as the chorus guitar.
- Intro — bass under the clean arpeggio (Em–C–G–D), softer and with less attack.
- (Ideal, for comparison) the verse played fingerstyle, to hear the difference in attack.
Format: WAV 24-bit / 48 kHz · mono · 5–10 s each · peaks between −12 and −6 dBFS, no clipping.
Suggested names: verso-bajo-DI.wav, verso-bajo-dedos-DI.wav, estribillo-bajo-DI.wav,
intro-bajo-DI.wav.
When you upload them, let me know: I’ll validate them (format, level, clipping, length) and integrate them as playable A/B examples in these sections and in the mixing ones.
What you should NOT chase yet
Quick route — getting the signal ready
Quick path
- Bass into the iD44's instrument (Hi-Z) input. Mono track.
- Tune with the Tuner, digging in like you'll actually play.
- Set the gain on the loudest part: peaks between −12 and −6 dBFS, no clipping.
- Record the raw DI (and, if you can, the processed signal in parallel over the Helix's USB).
- Check the take in the Monitor: peak in the green and some energy above 1 kHz.
Expected result
Expected result
A clean, well-leveled bass DI: peaks in the ideal zone with no clipping, a bass in tune, strings that still have attack, recorded in mono through the right input. It may sound plain — that’s fine. With the signal sorted, the next step is the one that really decides whether the bass will work: how it locks with the drums.