# Audio Sequence Builder

Build an audio sequence from clips placed at specified start times (can overlap)

> Canonical page: https://elysiatools.com/en/tools/audio-sequence-builder

- **Category:** Media

- **Keywords:** audio, sequence, timeline, mix, delay

## Overview

Sequence configuration
  - Upload audio clips in the desired order
  - Provide a start time (in seconds) for each clip
  - Clips can overlap, creating a mixed output
  - Useful for creating podcasts, soundscapes, or timing adjustments

  Example:
  - File 1: Background music (starts at 0s)
  - File 2: Voiceover intro (starts at 5.5s)
  - File 3: Sound effect (starts at 12s)

  Input:
  - Audio Files: [music.mp3, voice.wav, sfx.wav]
  - Start Times: 0, 5.5, 12

## Inputs

- **Audio Clips (1-20)** (file): Select audio clips
- **Start Times (seconds, comma-separated)** (text): e.g., 0, 5.2, 10
- **Output Format** (select)

## When to use

- When you need to combine several audio files into a single sequence with specific start times.
- For creating layered audio mixes where clips overlap, such as background music with voiceovers.
- To adjust the timing of audio elements without editing the original files.

## How it works

- Upload your audio clips in the desired order.
- Enter the start time in seconds for each clip, separated by commas.
- Select the output format from options like MP3, WAV, or AAC.
- Generate the sequence to produce a mixed audio file based on the timings.

## Use cases

- Producing podcast episodes with intro music, voice segments, and sound effects timed perfectly.
- Creating audio backgrounds for videos by layering music and ambient sounds at specific timestamps.
- Designing soundscapes for games or apps by timing various audio elements to create immersive experiences.

## Frequently asked questions

### What audio formats can I upload?

The tool supports common audio formats such as MP3, WAV, AAC, and others as per the file input.

### Can audio clips overlap in the output?

Yes, clips can overlap, and the tool will mix them accordingly in the final sequence.

### How many audio clips are allowed per sequence?

You can upload up to 20 audio clips for a single sequence.

### What output formats are available?

Available output formats include MP3, AAC, M4A, OGG, Opus, FLAC, and WAV.

### Is there a file size limit for uploads?

Each audio file can be up to 200 MB in size.

## Related tools

- [Audio Add Silence](https://elysiatools.com/en/tools/audio-add-silence): Add a specified duration of silence to the start or end of an audio file
- [Audio Podcast Trailer Builder](https://elysiatools.com/en/tools/audio-podcast-trailer-builder): Assemble a short podcast trailer from intro music, up to 5 highlight clips, a music bed under the clips, and a loudness target.
- [Audio Remove Segment](https://elysiatools.com/en/tools/audio-remove-segment): Remove a specified segment from an audio file
- [Audio Remove Silence Start](https://elysiatools.com/en/tools/audio-remove-silence-start): Remove silence from the beginning of an audio file
- [Audio Trim From Start](https://elysiatools.com/en/tools/audio-trim-from-start): Trim a specified duration from the beginning
- [Audio Add Chapters](https://elysiatools.com/en/tools/audio-add-chapters): Add chapters to an audio file from a label/chapters file
- [Album Art Extractor](https://elysiatools.com/en/tools/audio-album-art-extractor): Extract the album art from an audio file
- [Audio Description Ducking](https://elysiatools.com/en/tools/audio-audio-description-ducking): Mix an audio-description narration into program audio while ducking the program when narration is present.

## Samples

- [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
- [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows

## Related content

- [Audio Segmentation and Chapter Workflows](https://elysiatools.com/en/hubs/audio-segmentation-workflows): Turn long podcasts, lectures, and recordings into precise clips, silence-based sections, chapters, and ordered delivery segments.