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Audio Specifications

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At Tunestock, we seek to provide the highest quality music for your content. To this end, we ensure that consistency in audio standards are met for each track in our library. In this article, you will find information on our standards for audio files, loudness, how we ensure these standards are met, and how this attention to detail benefits you as a content creator.

Sample Rate & Bit Depth

All of our audio deliverables are 24-bit .WAV files with a sample rate of 48kHz. These are the industry standards for digital video delivery, and ensure that the music will sync appropriately with video without needing to first convert your file to the appropriate sample rate. Music at an inappropriate sample rate can stretch or distort when used in your 48kHz video projects.

Loudness

Loudness Overview:

YouTube, film, and TV broadcasters will all have their own standards and specifications for loudness, measured in LUFS (Loudness Units relative to Full Scale). Often, streaming services like YouTube will employ audio normalization if an upload is too loud, lowering the overall volume of your video to meet their standards. However, typically the volume of a quiet upload is not raised to reach this standard. Thus, it is ideal to have your video be as close to the standards as possible for optimum volume. Many online streaming platforms have standards around -14LUFS. (For example, YouTube’s standard is -14LUFS, but others such as Vimeo may vary.) Following this standard, each track in the Tunestock library is mastered to a standard of -14LUFS and -1dbBTP (Decibels True Peak). Thus, using music from Tunestock allows you to not have to worry about your music being too quiet, or massive amounts of normalization being applied to your content due to the music being too loud. If this is all confusing or you are altogether unfamiliar with these standards, know that Tunestock tracks are designed to be used in your video content without inherently introducing any problematic loudness.

Stems:

Stems are mastered so that when played together, they hit the same exact audio specifications and there is no difference in the sound compared to the full version. This allows for much more precise music editing for your videos. For example, you may need the synths in a certain track to get a bit quieter during a moment of dialogue, but you don’t want to crudely duck out the entirety of the music. Simply use the stems and lower the volume of the synth stem for that moment, and bring it back when the moment is passed. You may also want to mute entire stems at times, perhaps muting the main melody elements to have the music provide more of an underscore role. Because of how we master our stems, you can always be sure that your edits of the stems will sound natural relative to the full version. 

Shorts:

It is important to note however since loudness is measured as an average over the course of an entire recording, Shorts (the 60, 30, and 15-second edits available in the Track+ option for a track) generally will be louder than the full version and have a higher LUFS measurement. This is because short versions usually contain the most exciting and loud parts of the track (though sometimes the opposite could be true). Usually, short versions will vary ±1-2 LUFS from the -14LUFS of the full-length track. However, in some very dynamic tracks, this variance could be higher. Shorts will always still be -1dBTP, however. For consistency between full-length versions and shorts, this variance of LUFS is not corrected for. Again, since LUFS is an average measurement of loudness, if the variance of LUFS between short versions and full-length versions was corrected for, the shorts would generally sound quieter relative to the full-length version. 

Preview Tracks:

Preview tracks are mastered to similar levels as their non-preview equivalent audio files -14LUFS/-1dBTP (±1-2 LUFS in Shorts), however, a variance of ±1LUFS and ±dBTP may exist due to the audio watermark that is included in preview tracks. 

Our Process

At Tunestock, we use industry-standard tools and techniques to mix and master each track for our library in-house, ensuring 1) consistency in the above-described audio specifications as well as general audio quality, and 2) that our composers can spend more time writing great music and less time worrying about these numbers.

Conclusion

Our hope is that in providing this information, content creators or editors, and engineers who need to hit very specific specifications for their content can be aware of our approach and thus be equipped with the information they need to reach the individual audio specifications required of their individual projects.

Of course, you do not need to be an audio expert to create great content. If these numbers and specifications are not immediately relevant to your project, you can know that we have considered the best audio specifications for a variety of content applications, and that Tunestock music will always be a great choice for any piece of content.

 

 

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