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Audio Set CBR

Re-encode audio using Constant Bitrate (CBR)

Click to upload file or drag and drop file here

Maximum file size: 80MB Supported formats: audio/mpeg, audio/aac, audio/mp4, audio/x-m4a, audio/ogg, audio/opus

Key Facts

Category
Media
Input Types
file, select, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

Audio Set CBR is a utility tool that re-encodes audio files using Constant Bitrate (CBR) for consistent quality and compatibility. It supports popular formats like MP3, AAC, OGG, and Opus, allowing you to adjust bitrate, sample rate, and channels while preserving metadata.

When to Use

  • •When you need to convert audio to a constant bitrate for streaming or playback on devices that require CBR.
  • •To reduce file size by selecting a lower bitrate while maintaining acceptable audio quality.
  • •When standardizing audio files for a project or archive to ensure uniform bitrate across all files.

How It Works

  • •Upload your audio file in supported formats such as MP3, AAC, or OGG.
  • •Select the output format and target bitrate from the available options.
  • •Configure additional settings like sample rate and audio channels if needed.
  • •Download the re-encoded audio file with the specified CBR settings.

Use Cases

Converting podcast episodes to MP3 CBR for consistent playback on various platforms.
Optimizing audio files for mobile apps to reduce bandwidth usage while maintaining clarity.
Archiving music collections with a standardized bitrate for long-term storage.

Examples

1. Convert Podcast to MP3 CBR

Background
A podcaster has recorded episodes in variable bitrate MP3 and needs to ensure consistent quality for distribution.
Problem
Variable bitrate can cause issues with some players and streaming services.
How to Use
Upload the MP3 file, select MP3 (CBR) as output format, choose 192 kbps bitrate, and keep metadata.
Outcome
The podcast episode is re-encoded to constant 192 kbps MP3, ready for upload to podcast platforms.

2. Optimize Audio for Mobile Game

Game Developer
Background
A game developer needs to reduce audio file sizes for a mobile game without sacrificing too much quality.
Problem
Large audio files increase app download size and loading times.
How to Use
Upload OGG audio files, select OGG Vorbis output, set bitrate to 128 kbps, and adjust sample rate to 44.1 kHz.
Outcome
Audio files are compressed to 128 kbps CBR, reducing file size while maintaining good audio quality for the game.

Try with Samples

audio, video, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free FLAC Audio Samples
Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio

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FAQ

What audio formats are supported?

The tool supports MP3, AAC, M4A, OGG Vorbis, and Opus formats for input and output.

What is Constant Bitrate (CBR)?

CBR means the audio bitrate remains constant throughout the file, which can be beneficial for streaming and compatibility.

Can I keep the original metadata?

Yes, you can choose to preserve metadata like artist and title by enabling the 'Keep Metadata' option.

What bitrate options are available?

You can select from 96 kbps to 320 kbps, depending on your quality and file size needs.

Is there a file size limit?

Yes, the maximum file size is 80 MB per upload.

API Documentation

Request Endpoint

POST /en/api/tools/audio-set-cbr

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -
outputFormat select No -
bitrate select No -
sampleRate select No -
channels select No -
keepMetadata checkbox No -

File type parameters need to be uploaded first via POST /upload/audio-set-cbr to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-set-cbr": {
      "name": "audio-set-cbr",
      "description": "Re-encode audio using Constant Bitrate (CBR)",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-set-cbr",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]