FEATURE INSTRUCTIONS / Editing

Add music and sound effects; balance them with speech

Audition and add audio, then set its timing, volume, looping and fades.

6 stepsActual product screenshotsBased on the November 2026 interface

BEFORE YOU START

Before you start

Open a project with dialogue. Make the speech clear first, then add background music.

Screenshots show actual sample projects. Your interface may vary with your plan and updates. Instructions describe desktop browser operation; this guide can also be read on a phone.

STEP01

Choose Sound in Add media

Open Add media → Presets → Sound. Use the play button beside a track to audition it, select its row and choose Add. Import your own audio through My media.

  1. Action Choose Sound
  2. Action Audition and select
  3. Action Add the sound
The sound picker: audition a track, select it and add it. The product screenshot is in Japanese; the instructions explain the controls.
STEP02

Set when the sound starts and stops

Select the sound clip and adjust its position and length on the timeline. Use music for the intended scenes and sound effects at specific moments. Trim unwanted tails rather than leaving a long audio clip beyond the intended ending.

  1. Check Adjust the sound interval
Timeline with a sound clip. Adjust the interval during which audio plays on this row. The product screenshot is in Japanese; the instructions explain the controls.
STEP03

Lower the music while listening to speech

Select the sound clip and adjust Volume (%) in Properties. The example uses 20%, but the right level depends on the recording and speaker. Play both together and check whether the words remain clear on a quiet device.

  1. Enter Music volume
Example sound settings: volume 20%, fade-in 1.5 seconds, fade-out 2 seconds and looping enabled. The product screenshot is in Japanese; the instructions explain the controls.
Sound-clip volume
This controls the music or effect in this clip. Adjust the speech clip separately to change the voice level.
Different from toolbar volume
Playback volume changes how loudly you listen while editing. To lower the music in the final video, change the sound-clip setting.
STEP04

Fade the audio in and out

Fade-in is the time for the audio to rise; fade-out is the time to lower it at the end. The example uses 1.5 and 2 seconds. Use shorter fades for brief sound effects so their important attack remains audible. These are audio fades, separate from visual opacity.

  1. Enter Set audio fades
Example sound settings: volume 20%, fade-in 1.5 seconds, fade-out 2 seconds and looping enabled. The product screenshot is in Japanese; the instructions explain the controls.
STEP05

Choose looping and the source starting point

Enable Loop to repeat the source within the clip’s duration. Source start position selects where in the original audio to begin, not when the clip starts on the timeline. Use it to skip an intro, and listen across loop boundaries.

  1. Enter Loop and source offset
Example sound settings: volume 20%, fade-in 1.5 seconds, fade-out 2 seconds and looping enabled. The product screenshot is in Japanese; the instructions explain the controls.
STEP06

Review the whole sequence and exported audio

Review the opening, speech-heavy parts and ending. Whole-video fades in File → Export settings affect audio too. When combining them with music fades, check that speech does not disappear too soon. Finally, play the exported MP4 and review speech, music and ending.

  1. Enter Whole-video and audio fades
Whole-video fades affect audio too. Resolution and format are information fields in this dialog. The product screenshot is in Japanese; the instructions explain the controls.

BEFORE YOU FINISH

One final check.

Check speech clarity, loop joins, unwanted audio tails and words being cut off by fades.

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