Audio
Apple's audio requirements recommend a loudness of about −16 LKFS ±1, measured to the ITU-R BS.1770 standard, with true peaks no higher than −1 dB. They also list recommended bitrates by channel count at 44.1 kHz. Check the current table on Apple's page.
Artwork
Apple asks for square cover artwork within a stated pixel range and in a standard image format, without extra borders or text that the thumbnail cannot show. Check the current size range on Apple's page before exporting.
The feed
The RSS feed must be valid and publicly reachable, with the required show and episode fields. Your host usually creates this. Validate it before submission.
Review
Apple reviews new shows before they appear. A feed that fails validation, has missing artwork or has missing details can delay this.
How radio.app helps
We deliver finished files mastered to those targets and named consistently. We do not host or submit your show.