Controlled listening experiment · Reviewed

How Long Should a Kick Be at 120 BPM? A Listening Test

Compare a 115 ms kick with a 340 ms kick at 120 BPM. Hear how tail length changes space, weight and the separation between repeated hits.

Immediate answer

How does kick length change the groove?

A shorter kick leaves more space between hits and makes each arrival easier to separate. A longer kick supplies more sustained weight, but it can blur repeated hits or compete with bass when the arrangement is dense.

Listen first

Keep the volume fixed. Change one variable.

Play Condition A, then Condition B. The files are matched to the same full file RMS. Only the stated variable changes.

Condition A

Condition A: 115 ms

The tail ends quickly. Listen to the space that appears before the next quarter note.

Condition B

Condition B: 340 ms

The same source layers continue for longer. Listen for sustained weight and reduced space.

What changed

One controlled variable

Only the kick duration changes. The source layers, tempo, pattern, playback duration and full file RMS remain controlled.

Result

What the comparison demonstrates

The 115 ms version separates each hit clearly. The 340 ms version carries more energy between hits. Neither length is universally correct; bass rhythm and arrangement density decide which one is useful.

Listen for

How much silence or low level space appears before the next hit.
Whether longer sustain feels like weight or like a continuous low frequency floor.
Whether the onset remains easy to distinguish when the tail is longer.

Why it works

At 120 BPM, one quarter note lasts 500 ms, but the kick rarely owns that entire interval.
Bass notes, percussion and room decay reduce the practical space available to the tail.
Length should be chosen from the next important low frequency event, not tempo alone.

Common mistakes

Using a genre rule as an exact duration target.
Shortening the entire hit when only the sub tail is excessive.
Choosing a long kick in solo and ignoring what happens when the bass enters.

Repeat the decision in KX1000

Use Length to establish the available tail, then use Fade to make the ending smooth. Rebalance Sub after a large length change because duration alters perceived low frequency weight.

Method and rights

Original sources, disclosed processing

Both files use the same KX1000 Transient, Body and Sub sources in a four on the floor pattern at 120 BPM. The first tail is 115 ms and the second is 340 ms. Both files are matched to the same full file RMS.

Source material: Original KX1000 Transient, Body and Sub audio supplied by Dystant Sounds. Any reference tones were generated specifically for this experiment.
Third party samples: None.
Master format: Mono PCM WAV, 16 bit, 44.1 kHz. This preserves the native format of the KX1000 source files.
Artifact checks: Peak safety, DC offset, file boundaries and paired RMS matching passed before publication.

Read the complete Kickopedia audio standard