Audio Formats Explained: A Podcaster's Complete Guide

Published March 8, 2026 · 5 min read

As a podcaster, you encounter audio formats at every stage — recording, editing, exporting, and publishing. Choosing the right format at each step directly affects your audio quality, file sizes, and compatibility with hosting platforms. Here's a clear breakdown of every format that matters.

WAV — the recording and editing standard

WAV (Waveform Audio File Format) is uncompressed PCM audio. It's the format you should record in and work with during editing.

• Use for: Recording raw episodes, editing in your DAW, archival masters.
• Quality: Lossless — every audio sample is preserved.
• File size: Large. A 1-hour mono podcast at 44.1 kHz/16-bit is about 300 MB.
• Compatibility: Universal. Every audio editor supports WAV.

Always record your podcast in WAV. You can compress later for distribution, but you can't un-compress a lossy recording. Read more about why uncompressed audio matters.

MP3 — the distribution format

MP3 (MPEG Audio Layer III) is the most widely used lossy audio format. For podcast distribution, it remains the standard.

• Use for: Publishing and distributing episodes to podcast platforms.
• Quality: Lossy compression. At 128 kbps mono (standard for spoken word), quality is excellent for voice.
• File size: Small. That same 1-hour episode drops to about 55 MB at 128 kbps.
• Compatibility: Universal. Every podcast platform, player, and device supports MP3.

For podcast distribution, export your final episode as MP3 at 128 kbps mono for speech-only shows, or 192-256 kbps stereo if your podcast includes music segments.

AAC / M4A — Apple's alternative

AAC (Advanced Audio Coding), often wrapped in the M4A container, is a lossy format that delivers better quality than MP3 at the same bitrate.

• Use for: Apple Podcasts optimized delivery, supplementary format alongside MP3.
• Quality: Better than MP3 at equivalent bitrates, especially below 128 kbps.
• Compatibility: Excellent on Apple devices and most modern players. Some older devices may not support it.

Apple Podcasts recommends AAC as the preferred format. If your audience is primarily Apple users, consider offering AAC. However, MP3 remains the safer universal choice.

FLAC — lossless compression

FLAC (Free Lossless Audio Codec) compresses audio without losing any data. It's like ZIP for audio.

• Use for: Archiving masters, transferring between editors without quality loss.
• Quality: Identical to WAV — completely lossless.
• File size: Typically 50-60% of WAV size.
• Compatibility: Most audio editors support it, but not all podcast platforms accept FLAC uploads.

FLAC is great for archival — it saves storage compared to WAV while preserving full quality. For active editing, WAV is more practical since every tool supports it natively.

OGG Vorbis — the open-source option

OGG Vorbis is a free, open-source lossy format with quality comparable to MP3.

• Use for: Niche platforms, open-source workflows, web audio.
• Compatibility: Limited on Apple devices and some podcast platforms. Not recommended as your primary distribution format.

The podcaster's format workflow

Here's the practical workflow most successful podcasters follow:

1. Record in WAV — 44.1 kHz or 48 kHz, 16-bit or 24-bit. Always uncompressed.
2. Edit in WAV — Keep your working files and project in WAV throughout the editing process.
3. Export a WAV master — After final editing and mastering, export a full-quality WAV file as your archival master.
4. Convert to MP3 for distribution — Export or convert your master to MP3 at 128 kbps (mono) or 192 kbps (stereo) for upload to your hosting platform.
5. Archive the WAV — Store the WAV master. If you ever need to remaster or repurpose the episode, you have the full-quality source.

If you've received audio from a guest or co-host in MP3 format and need to bring it into your editing workflow, converting it to WAV first ensures compatibility with your DAW and avoids any format-related issues during editing.

Related reading: WAV vs MP3 for music production · Privacy in online audio conversion · Converter FAQ