In at least wav 24bit 44.1khz or 24 bit 48 bit ideally we can handle any sample rates, please don’t send MP3s or any Spotify or Youtube links as references – please supply everything as. Any form of data compression is reducing the quality of your music even flacs please send wavs.
Use services like WeTransfer, Dropbox for example.
You can submit your music directly to us via https://curved.wetransfer.com