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Sound basics: bass, mids, treble and how EQ works

Most of AudioMatch's tools shape sound. If you've never thought about how sound works, this short guide gives you everything you need to understand the rest of the app — no experience required.

Sound is made of low and high pitches

Every sound is a mix of pitches, from very low to very high. We group them into three families:

  • Bass (lows) — the deep stuff you feel as much as hear: a kick drum, a bass guitar, the rumble in a movie explosion.
  • Mids (middle) — where most of the action is: voices, guitars, pianos, most instruments. If something sounds "boxy" or "honky", that's the mids.
  • Treble (highs) — the bright, airy top: cymbals, the "sss" and "t" sounds in speech, sparkle and detail.

"Frequency" is just a precise word for pitch, measured in hertz (Hz) and kilohertz (kHz = 1000 Hz). Low numbers are bass, high numbers are treble — but you don't need the numbers. Just remember low / middle / high.

What an equalizer (EQ) does

An equalizer lets you turn those pitch ranges up or down. Think of the bass and treble knobs on a car stereo — an EQ is the same idea, but with far more precision: you can lift just the deep bass, or gently calm only the harsh highs, without changing everything else.

Turning a range up is a boost; turning it down is a cut.

Decibels (dB): the "how much" number

Boosts and cuts are measured in decibels (dB). Roughly: +3 dB is a little louder, +6 dB is clearly louder, +10 dB is a lot. Minus numbers mean quieter, and 0 dB means no change. Small moves go a long way — start gentle.

Loud vs quiet: "dynamics"

Music also has dynamics — the difference between its quiet and loud moments. Some tools (like the Volume Leveler and the Limiter) work on dynamics rather than pitch: they even out, or put a safe cap on, how loud things get.

Stereo and "space"

Stereo means your left and right ears get slightly different sound — that's what creates a sense of left, right and width. Effects like Sound Stage and Reverb work on this feeling of space.

That's everything you need. Each effect article tells you what it does, when to use it, and what every setting changes — all in this same plain language.

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