# Track EQ
Source: https://docs.aden.space/docs/help/make-music/track-audio-eq

A real-time, FL-style draggable equalizer (bell / shelf / notch / band-pass / low-high cut bands over a live spectrum or scrolling heat map) with per-band bypass, hold-to-solo auditioning, and loudness-matching auto-gain so the overall volume stays steady, plus playback tools (pitch shift and speed change) and the ability to attach an EQ snapshot to a timed comment so frequency feedback lands on a specific section.
{/* Generated by `bun docs:publish` from docs/features/track-audio-eq.md: edit the spec, not this file. */}

## What it is [#what-it-is]

The track player has a built-in **equalizer**. While a track is playing you can
boost or cut frequency bands in real time and watch a live spectrum analyzer
respond: exactly like the LUFS readout, but for shaping the sound instead of
just measuring it. Each band can be a **bell** (peak), a **low/high shelf**, a
**notch**, a **band pass**, or a **low/high cut** (high/low pass): so you can
roll off rumble with a low cut, surgically kill a resonance with a notch, add air
with a high shelf, and so on. It starts from seven bells (sub, bass, low-mid,
mid, hi-mid, presence, air); click any point to change its shape, **bypass** it,
or hold **Solo** to audition just that band's frequency region. Like FabFilter
Pro-Q. Double-click empty graph space to drop a new band right where you point.
The spectrum behind the curve can be switched to a scrolling **heat map**
(spectrogram) view, FL-style, and the point readout shows the nearest musical
note (e.g. "1k (B5)").

**Auto gain** (on by default) keeps the overall volume the same whether you boost
or cut, so shaping the sound doesn't make the track jump louder or quieter, and
the panel shows how much gain it's applying so it's never a mystery.

You can also turn an EQ setting into **feedback**. Dial in the frequencies you'd
change, hit **Add to comment**, and the EQ curve rides along with a timed comment
so collaborators see precisely what you mean by "too muddy here" or "needs more
air in the chorus". Anyone reading the comment can hit **Hear** to apply that EQ
to playback and jump straight to the section.

## Using it [#using-it]

### Shaping playback [#shaping-playback]

1. Play a version (Pro plan or above; desktop or mobile).
2. In the comment box, click the **equalizer** button (next to emoji / voice /
   attach) to open the EQ popover.
3. Drag the points on the graph to move each band's **frequency** (x) and
   **gain** (y): like an FL-Studio parametric EQ, over a live spectrum (or a
   scrolling **Heat** spectrogram: toggle in the graph's corner). **Click** a
   point to reveal its band toolbar: **shape** picker (bell / low shelf / notch /
   band pass / high shelf / low+high cut), **Bypass** (per-band on/off), and
   **Solo** (hold to hear only that band's frequency region). **Scroll** a point
   (or Shift+↑/↓) to widen/narrow it (Q). **+** or **double-click empty space**
   adds a band; **double-click** a point (or Backspace) removes it. **On/Off**
   bypasses everything, hold **A/B** to hear the original vs your EQ, and the
   named reset at the bottom of the panel flattens the bands (and pitch/speed
   with them, its label says which). (Gain-less shapes, cuts, notch, band pass, stay on the
   0 dB line and only move in frequency.)
4. **Auto gain** (shield toggle, on by default) keeps the overall volume steady
   as you boost or cut, a net boost is turned down, a net cut is turned up, so
   the loudness doesn't lurch. The applied amount shows next to the title (e.g.
   "auto gain −2.3 dB"). Turn it off to hear the raw, uncompensated signal. Drag
   the bottom-right corner to **resize** the panel; the size is remembered.
5. Under the playback tools the panel spells the **loudness** out: momentary,
   short term and integrated with their names, and how far the integrated value
   sits above the −14 LUFS streaming services normalise to.

While any of this is on, the readout above the waveform **stays visible** with a
marker saying what is engaged (`EQ 3`, `Pitch/speed`, `Mono`), instead of fading
out with the rest of the player chrome. A shaped EQ you cannot see is a shaped
EQ you forget is on.

### Playback tools: pitch & speed [#playback-tools-pitch--speed]

Below the graph the panel has a **tools row** with two playback tools:

* **Pitch** shifts the whole track up or down in **semitones** (±12) without
  changing the speed: audition a chorus a key higher, or check how a vocal sits
  a few semitones down.
* **Speed** changes the playback rate (0.5×–2×, in 0.05 steps) without changing
  the pitch: slow a section down to pick apart a fill, or skim at 1.5×.

Both are listening tools for your own playback session: they reset when you
leave (they're never saved as your track EQ is), and the panel's reset button
at the bottom clears them along with the bands. When you hit **Add to comment**, any active
pitch/speed is captured into the snapshot alongside the EQ curve, so "this
chorus would sit better a key down, slowed a touch" is reproducible feedback:
the comment shows a small `+2 st · 1.25×` badge next to the curve, and **Hear**
replays the section with the same pitch, speed, and EQ applied. You can attach
pitch/speed on their own too (with a flat EQ).

### Attaching EQ to a comment [#attaching-eq-to-a-comment]

1. With the EQ dialed in, click **Add to comment** in the popover. The EQ curve is
   attached to the comment you're writing and the start time is set to the current
   playhead.
2. Optionally set an end time to scope the feedback to a section, write your note,
   and post. The comment shows a small EQ curve.
3. Readers click **Hear** on the comment to apply the EQ to playback and seek to
   the section, so they can hear the suggestion in context.