What is Bitrate?

Bitrate determines how much data is used to represent each second of your audio file. Measured in kilobits per second (kbps), bitrate directly affects both audio quality and file size. Higher bitrates preserve more audio detail and sound better, but they also create larger files that take longer to download and use more bandwidth. For podcasting, the standard bitrate is 128 kbps, which provides excellent quality for speech while keeping file sizes reasonable. At 128 kbps, a 60-minute podcast episode is typically 50-60 MB. Some podcasters use 192 kbps for shows with significant music content, as music benefits more from higher bitrates than speech alone. Very few podcasters use bitrates above 192 kbps because the quality improvement becomes imperceptible to most listeners, while file sizes grow significantly. Lower bitrates like 64 kbps or 96 kbps are generally not recommended for podcasts because they can make speech sound muffled or robotic. When exporting your final MP3, your editing software will ask you to choose a bitrate. For most podcasters, 128 kbps stereo (or 64 kbps mono if you're doing voice-only) is the sweet spot—excellent quality that listeners won't notice is compressed, with file sizes that won't frustrate people on slower connections. The key is consistency—use the same bitrate for all episodes so your file sizes are predictable.