Songs w/vocals may be complicated by your contract with your demo artist, singer, etc. Make sure all your ducks are in a row.

Here's from their FAQs, regarding WAV vs MP3. I personally always sent 16 or 24 bit WAV files. They seem to be suggesting that's what they need (or AIFF) in order for their own conversion process to not add degradation to the file.

Knowledge Base Article: KB1775
Topic: FAQ - Publisher Questions
Title: Which audio file type is most desired by customers (WAV or MP3)?
Last Reviewed: Mar 25, 2008
Keywords:
Q. Which audio file type is most desired by customers (WAV or MP3)?

A. When a client purchases a track, they are able to choose the file format they wish to download (wav, mp3, aiff, wma and au). Regardless of which type of file you upload, we convert it in real time to the file type the client selects to download. As long as you upload tracks as high resolution WAV or AIFF files, our system is able to encode them quickly into MP3 or other file formats as necessary for download by the clients after they make a purchase.

Last edited by Michael Zaneski; 03/15/23 04:40 PM.
Fate doesn't hang on a wrong or right choice
Fortune depends on the tone of your voice

-The Divine Comedy (Neil Hannon)
from the song "Songs of Love"
from the album "Casanova" (1996)