For voice recordings and podcasts, the quality ceiling is set by the microphone and the recording environment — not the bitrate. Once you have a decent recording, the right bitrate settings keep it sounding good without inflating file sizes unnecessarily.
The Standard Settings for Podcasts
| Setting | Recommended value | Why |
|---|---|---|
| Format | MP3 | Universal compatibility with podcast apps |
| Bitrate | 128 kbps (stereo) or 64 kbps (mono) | Standard quality; often minimum required by hosts |
| Channels | Mono | Voice needs no stereo; smaller files, consistent on all speakers |
| Sample rate | 44.1 kHz | CD standard; correct for podcast audio |
Many podcasters land on mono 128 kbps as a practical all-around choice — better than the mono minimum, compatible everywhere, and file sizes that are manageable for hosts and listeners.
Why Mono Is Standard
Voice doesn't have left-right audio information in the meaningful sense that music does. A mono podcast sounds centred and clear on earphones, phone speakers and Bluetooth devices. A stereo recording with two nearly-identical channels produces double the file size for essentially the same listening experience.
If you have two hosts with separate microphones recorded in separate tracks, mixing to a stereo file can help — but even then, many podcasts deliver the final mixed mono to reduce file size.
File Size at Standard Settings
Podcast file sizes (128 kbps stereo):
| Duration | Approx. size |
|---|---|
| 20 minutes | ~18 MB |
| 45 minutes | ~41 MB |
| 60 minutes | ~55 MB |
| 90 minutes | ~82 MB |
At 64 kbps mono, these halve again — useful for long-form content where download size matters.
The Bitrate Doesn't Fix Recording Problems
Poor microphone, echo from a hard room, background noise — these are what actually make a podcast sound bad. No amount of bitrate fixes a poor source recording. Invest in environment (soft furnishings, a quiet room) before spending time on bitrate settings. For compressing finished episodes, use Audio Compressor. For understanding the underlying quality trade-offs, see what is audio bitrate: 128 vs 192 vs 320 kbps.
If You Also Publish Video Podcasts
Video podcasts (published to YouTube as well as audio directories) need audio that's mixed to the same standards as audio-only podcasts. The video side is handled separately — audio remains MP3 or AAC mono at 128 kbps for the audio feed, while the video version uses that same audio embedded in an MP4. Keeping the audio standards consistent means the audio-only subscribers and the video viewers hear the same quality. For compressing a podcast video file, see how to prepare videos for uploading to a website, and for the audio compression itself, Audio Compressor handles the settings described above.
