WAV: For Recording and Editing Only
WAV (Waveform Audio File Format) is an uncompressed, lossless audio format. That means it captures every single bit of data exactly as it was recorded. The quality is flawless.
The problem: WAV files are massive. A one-hour podcast in WAV format can easily exceed 600MB. If you upload a WAV file to a podcast host, it will eat through your monthly storage allowance, and listeners trying to download it on a cellular network will give up.
Verdict: Always record and edit your podcast in WAV to maintain the highest quality. However, never publish your final podcast as a WAV file.
M4A (AAC): The Apple Favorite
M4A (which usually uses the AAC codec) is the successor to MP3. It was designed by Apple to provide better audio quality at lower file sizes.
The problem: While Apple Podcasts loves M4A, it has compatibility issues with older Android podcast apps and some niche RSS feed readers. It's an excellent format, but in the podcasting world, universal compatibility is king.
MP3: The Undisputed King of Podcasting
MP3 is a compressed, lossy format. Yes, it technically loses some data compared to a WAV file, but at a high enough bitrate (like 128 kbps or 192 kbps), the human ear cannot tell the difference when listening to spoken word.
Why it's the best:
- Universal Compatibility: Every device, app, and browser on earth can play an MP3 file natively.
- Small File Sizes: A one-hour podcast in 128 kbps MP3 format is only about 55MB.
- ID3 Tags: MP3s support robust metadata (ID3 tags) which embed your cover art, episode title, and show notes directly into the file.
The Golden Standard Settings
When you are ready to export your final episode from your editing software, use these exact settings for the best balance of quality and file size:
- Format: MP3
- Bitrate: 128 kbps (Constant Bit Rate / CBR) for spoken word, or 192 kbps if your show features heavily produced music.
- Sample Rate: 44.1 kHz
- Channels: Mono (for solo podcasts) or Stereo (if you have complex sound design or multiple speakers panned left/right). Note: Exporting in Mono cuts the file size in half!
How to Convert Your Audio
If your editing software exported a massive WAV file or you need to extract audio from a Zoom video recording, you don't need to re-open your video editor. Use our free Audio Converter Tool. It runs securely in your browser to instantly convert your files to broadcast-ready MP3s.