An hour of a TV recap podcast recorded as a CD-quality WAV file weighs about 635 MB, which becomes a real problem when a finale airs on Sunday night and the episode needs to be live by Monday morning.
Convertio’s audio converter online tool converts WAV recordings into compressed MP3 files in the browser, bringing that same hour down to roughly 58 MB at 128 kbps.
Table of Contents
-Why podcast audio file formats matter after the recording
-Podcast audio file formats compared
-A practical routine for episode day
-Small choices that save time later
-What conversion cannot fix
-Keeping the rights side in order
-Closing thought
Key Takeaways
Recording apps usually save WAV, which is large: about 10.6 MB per minute in stereo at CD quality.
A 128 kbps MP3 of the same episode is roughly one-eleventh of that size.
Keep the original WAV as your master and treat the MP3 as a copy.
Conversion shrinks files; it does not repair noise, clipping, or lost detail.
Convert only audio you recorded yourself or have permission to use.
Why podcast audio file formats matter after the recording
Most recording apps and audio interfaces save WAV by default, because WAV keeps every sample without discarding anything. At 16-bit and 44.1 kHz in stereo, the standard CD-quality setting, the data rate is 1,411 kbps, or about 10.6 MB per minute. A 60-minute recap lands near 635 MB, and a two-hour roundtable passes 1.2 GB.
![IMAGE PLACEMENT 1 — Alt text: “Two podcast microphones and a laptop on a desk showing an audio waveform, set up for recording a TV recap episode”. Caption: “A raw recording session can leave several large WAV files on the drive before editing begins.”]
Fan podcasts are rarely a single clean file, either. Hosts and guests often record separate tracks, so one episode can leave several large files on a laptop before the first edit. Hosting services also set their own upload limits and accepted formats, so it is worth checking yours before release day rather than during it.
SpoilerTV’s own podcast shows the other end of the pipeline. It is a weekly show about the latest news from TV, movies, entertainment, and games, published as a video on YouTube with separate audio versions alongside it. Whatever the studio recorded, listeners receive files built for playback rather than for editing.
Podcast audio file formats compared
The choice mostly comes down to how much you want to keep versus how much you want to upload. The sizes below are calculated for one hour of stereo audio at 44.1 kHz.
| Format | Compression | Approx. size per hour | Where it fits |
| WAV (16-bit) | None | about 635 MB | Master recordings and editing |
| FLAC | Lossless | Smaller than WAV, varies with content | Archiving masters without discarding detail |
| MP3 at 192 kbps | Lossy | about 86 MB | Music-heavy episodes, theme songs, clip compilations |
| MP3 at 128 kbps | Lossy | about 58 MB | General distribution of a talk show |
| MP3 at 64 kbps (mono) | Lossy | about 29 MB | Spoken-word chat with two or three voices |
Spoken word tolerates lower bitrates better than music. A mono file at 64 kbps can be enough for a two-person conversation, while an episode with theme music and scene clips benefits from 128 kbps or higher.
A practical routine for episode day
A short, repeatable order of steps keeps a weekly show from turning into a weekly scramble:
-Record to WAV. Use the highest-quality setting your app offers, one track per speaker if possible.
-Edit and mix. Trim the pauses, balance the voices, and export one finished WAV.
-Convert a copy. Convertio converts the uploaded file in the cloud after you choose MP3 as the output format, so no encoder needs installing on a borrowed laptop or a co-host’s machine.
-Listen to the result. Check the opening seconds, the ending, and any loud moments, since a lossy copy can reveal problems the master hid.
-Archive the master. The original WAV stays on your drive, because the MP3 is a copy and not a replacement.
-Upload to your host. Add the title, description, and episode art there.
When a show also publishes shorter extras, such as a one-minute “scene of the week” clip alongside the main episode, Convertio accepts several files in one batch, which saves repeating the upload for each clip.
Small choices that save time later
A few decisions made before the first conversion tend to matter more than the bitrate itself.
Mono or stereo. A talk show with two voices gains very little from stereo. Saving the final file in mono halves the amount of data at the same bitrate, which is the simplest way to reduce audio file size without touching the sound quality of the voices. Keep stereo when the episode includes music beds or panned effects.
Sample rate. CD-quality audio uses 44.1 kHz, while video editors usually work at 48 kHz. A show that releases both an audio feed and a video version, the way the Spodcast does, can end up with mixed rates in the same project. Pick one rate for the whole episode and stay with it, so no file is resampled without you noticing.
File names. A name such as recap-s02e08-master.wav next to recap-s02e08-128k.mp3 makes it obvious which file is the original and which is the copy. On a busy release week, that small habit prevents the wrong file from going live.
What conversion cannot fix
Conversion changes the container and the compression. It does not improve what was recorded. A few honest limits are worth knowing before you rely on it:
-Lossy formats discard detail. MP3 and AAC remove parts of the signal that listeners are least likely to notice. At very low bitrates, music and room ambience start to sound thin.
-Going backwards does not restore anything. Converting an MP3 back to WAV produces a larger file, not a better one. The discarded detail is gone.
-Raising the bitrate does not add quality. Turning a 64 kbps MP3 into a 192 kbps MP3 only makes a bigger copy of the same limited sound.
-Repeated re-encoding adds up. Each trip through a lossy format can add small artifacts, so always convert from the original WAV, not from a previous MP3.
-Recording problems stay. Background hum, clipped peaks, and echo survive the conversion and need to be handled in the edit.
Because Convertio works from whatever file it receives, the quality of the output depends entirely on the quality of the file you upload.
Keeping the rights side in order
Audio conversion is a technical step, and it does not change who owns the recording. Convert files you recorded yourself or have permission to use. Pulling dialogue or a soundtrack from an episode of a series for use in your own podcast is not covered by how easy the conversion is. Clips and music can need permission, rules differ from country to country, and a short excerpt is not automatically free to use. For anything beyond your own voices, check the licence or ask the rights holder.