Podcasts on micro.blog using the iOS App Wavelength are maximum 25MB and can only be in MP3 format
Pontifications
"MP3s should be 25 MB or less. The following list shows an estimate for how long episodes can be depending on the audio encoding:
- 64 kbps: 53 minutes
- 96 kbps: 35 minutes
- 112 kbps: 30 minutes
- 128 kbps: 26 minutes (used in Wavelength)
- 192 kbps: 17 minutes”