Audio Background Music Adding Tool

Batch add background music to audio files, with fixed or random background music modes and adjustable volume ratio.

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

Return to old version

A desktop version is available with more powerful, stable features. Open desktop version

Follow the steps: select the main audio and background music, set mixing options, then process and download.

1Select audio to add background music to

Click to choose files, or drag audio here

Supports MP3, WAV, AAC, FLAC, OGG, M4A, WMA, AIFF, OPUS, WebM, and more

2Main Audio File List

No main audio files selected

3File Overview

Main Audio Count

Total File Size

0 B

Show Items

4Sample Data

Generate one main audio and two background tracks to quickly test mixing, looping, fade in/out, and compressed download.

After this step is complete, click Next to set background music.

1Choose background music assignment

Fixed Background Music All main audio uses the first file in the background music list. Good for intros, courses, and podcasts. Random Background Music Each main audio randomly uses a file from the background music list. Good for batch short content. Sequential Loop Assignment Assign background music to main audio in list order, looping from the start if needed.

2Select Background Music Files

Click to choose files, or drag background music here

Fixed mode uses the first file; random and sequential modes use all background music

3Background Music Overview

Background Music Count

Total File Size

0 B

Current mode

Fixed

4Background music files

No background music selected

1Volume ratio

Original audio volume

Speech content usually stays at 100%

Background music volume

For speech, start around 15%-35%

Output volume

Controls overall mixed loudness

2Background music processing

Length strategy

Background start (sec)

Background fade in (sec)

Background fade out (sec)

3Sound protection

Prioritize voice, lower background

Auto-lower background music when the original audio is loud.

Reduction (dB)

Trigger threshold

Auto anti-clipping

Lowers proportionally when mix peaks exceed the limit to reduce clipping.

Peak limit (dBFS)

4Output settings

Output format

MP3 uses local encoder; falls back to WAV on failure

MP3/WebM bitrate

Sample rate

Channels

1Confirm before processing

Main Audio

Background Music

Assignment method

Fixed

Output format

MP3

Waiting to process

2Result

Waiting for result

Instructions

Software Instructions

Select main audio: Click the “Select Main Audio” button and choose the audio files you want to add background music to. Batch selection of multiple audio files is supported. The interface only displays the first 20 files, but all files will be included during processing.
Select background music: Click the “Select Background Music” button to import one or more BGM files. Fixed mode uses the first background music file, random mode assigns files randomly, and sequential mode cycles through the list in order.
Set mixing parameters: Adjust the original audio volume, background music volume, and total output volume separately. You can set background music looping, start position, fade in/out, voice-priority background ducking, and peak protection.
Select output format: Choose MP3, WAV, or WebM/Opus, and set the bitrate, sample rate, and channels. If the MP3 encoding component is unavailable, the output will automatically switch to WAV.
Save settings: Click the “Save Settings” button to save commonly used parameters such as volume, fade in/out, and output format, and continue using them the next time you open the tool.
Start processing: Go to the “Process & Download” page. After confirming the number of main audio files, number of background music files, assignment method, and output format, click “Start Adding Background Music”.
Download results: After processing is complete, you can preview the results. A single file can be downloaded directly, and multiple files will retain their original file names. If duplicate names occur, a number will be appended to the file name, and the files can be downloaded as a ZIP package.

FAQ

A: Fixed mode uses the same background music for all main audio files; random mode randomly selects from the background music list; sequential mode assigns files in list order, looping back to the beginning if there are not enough background music files.

A: You can choose “Loop until the main audio ends” in the length strategy, and the background music will repeat automatically. You can also choose “Play once only, leave silence if insufficient,” which is suitable for scenarios where you only need background music at the beginning.

A: For voice content, keep the original audio at 100%, set the background music to 15%–35%, and enable “Voice-priority background ducking.” If the BGM still overpowers the voice, further reduce the background music volume or increase the ducking amount.

A: The result will try to keep the original file name and replace the extension based on the output format. For example, when “Course01.mp3” is output as WAV, it will generate “Course01.wav”. If a duplicate name occurs, a numbered file name such as “Course012.wav” will be generated.

A: The tool supports batch processing. Actual speed depends on device performance, audio duration, output format, and the number of files. The interface only displays the first 20 files, but processing and ZIP download will include all selected files.

A: MP3 requires support from a local encoding component. If the component fails to load or the current environment does not support the corresponding encoding, the tool will automatically output WAV to prevent the processed result from being lost.

A: No. Audio decoding, mixing, encoding, and compressed downloads are all completed locally on your device. Files are not uploaded to the server.