Before sending your mix off for mastering, there are some key points you should consider to ensure your work sounds its best and that the mastering process is smooth and effective.
Follow these tips to prepare your mix files:
1. Export with the Correct Sample Rate and Bit Depth Settings
When exporting your final mix, it’s crucial to use the same sample rate and bit depth you used throughout the mixing process. If your session was recorded and mixed at 48 kHz and 24-bit, export at 48 kHz and 24-bit. Converting the sample rate or bit depth during export can introduce unwanted artifacts or quality loss. Avoid 16-bit exports.
2. Leave Headroom for the Mastering Engineer
One of the most common mistakes is sending a mix that’s “too hot,” meaning the volume peaks are too high. For mastering, it’s important to keep your mix bus peaks between -9 and -3 dBFS. This range is ideal because it gives us enough “headroom” (available space) to apply our processing (compression, equalization, limiting) without digitally saturating the audio. If you send a mix that’s already clipping or too close to 0 dBFS, we’ll have less room to work and optimize the sound for different playback platforms.
3. Lossless File Formats: WAV or AIFF
Always export your files in .wav or .aiff format. These are uncompressed audio formats, meaning they retain all the information from your mix without any quality loss. Avoid sending files in lossy formats like MP3, AAC, or any other compressed format, as they’ve already undergone a compression process that removes information and can introduce artifacts, which will negatively affect the final mastering result.
4. Always Attach the Demo/Rough Mix and Reference Tracks
For us to get a clear idea of your vision, always attach the preliminary demo or “rough mix.” If you have a limited version already, please attach that too. Additionally, include one or several reference tracks that you like the sound of in terms of mix and mastering. This will help us understand the tonal balance, dynamics, and overall loudness you’re aiming for.
5. Provide Complete Project Metadata
Along with your audio files, include the following information for each song: Song Title, Artist, album order (if applicable), and the ISRC code (if you already have it), etc.
6. Carefully Check Your Mix for Errors
Before exporting, take your time to listen to your mix from beginning to end several times, paying special attention to potential errors. Look for digital clipping, pops or clicks (short, abrupt noises), or any other unwanted artifacts that might have slipped in. It’s much easier to correct these issues at the mixing stage than during mastering.
7. File Submission Method
Finally, files should be sent to info@oconnellmastering.com using a reliable file-sharing service. Popular and recommended options include Google Drive (make sure to grant necessary access permissions) or Dropbox. This ensures large files are transferred securely and efficiently.
By following these simple but crucial tips, you’ll ensure your mix is in the best possible condition for the mastering process, allowing your music to shine with its full potential.