In order to upload your music properly to TuneCore, we recommend all audio files be 16 bit (sample size), 44.1 kHz (sample rate), 1411 kbps (bit rate) stereo WAV files.
If you are exporting from a recording program or importing (also known as "ripping") the audio from a CD into iTunes, you can change the settings of your export to be .wav, 16 bit (sample size), 44.1 kHz (sample rate), 1411 kbps (bit rate), stereo mode.
To help ensure error-free uploading, we recommend downloading the latest version of your web browser (ex: Mozilla Firefox, Google Chrome, Safari, etc).
Follow easy instructions on how to convert your music to the required format in iTunes here.