Choose your music,
listen and try some changes.

Loudness is how loud music sounds. LUFS is a unit that puts the whole track's loudness into a number. −14 aims for a louder result than −16. Choosing a higher number does not improve sound quality.

• Keep original loudness: use the original level as the starting point. If a brief sound is too loud, the whole track is turned down.
• −14 LUFS: bring the whole track close to this loudness.
• −16 LUFS: aim for a quieter result than −14.
• Adjust manually: open detailed controls and choose your target.

Like turning a volume knob, this raises or lowers the whole track together. It does not make every quiet passage equally loud.

−14 and −16 are starting choices to help you decide. They are not the right answer for every track or settings that YouTube always requires.

A track can sound quiet overall yet contain a very brief loud sound, such as a drum hit. Raising it to your target could make that moment too loud, so it may be raised less. The result shows the actual level and explains why.

True Peak estimates the loudest instant that may occur during playback. With Reduce overly loud sound on, the whole track is lowered to stay within your limit. You can leave −1 dBTP as it is at first. The result does not have to reach that number.

This protection lowers the whole song. It differs from a limiter that pushes down only loud peaks. It does not automatically add heavy compression to reach a target, and cannot fully restore sound that is already distorted.

EQ changes the balance of low, middle and high sounds. Like seasoning food a little at a time, make small changes only where the sound needs them.

• Bass: affects the low, weighty feel of sounds such as bass guitar or a bass drum.
• Mids: the range where much of a voice or guitar is heard.
• Treble: affects high, bright sounds such as cymbals. Adding too much can sound harsh.

A + number adds more; a − number reduces it. 0 leaves it unchanged. This affects the whole music file with its instruments mixed together, so you cannot change just the voice or a single instrument.

Songs have quiet parts and loud parts. The difference is called dynamics. A compressor gently pushes down loud sounds to reduce that difference. This is different from compression that makes files smaller.

It can make the sound more even, but may also soften the punch of drums. If unsure, start with Keep the difference. Extra processing may be skipped if the music is already heavily compressed.

No. This sets how much the EQ and compressor you turned on change the sound. Lower means a smaller change; higher means more. It does not halve your target loudness.

For example, bass at +2 dB with 50% strength applies only +1 dB. At 0%, this EQ and compressor do not change the sound. Loudness adjustment, peak protection and how closely you follow a reference each have separate settings.

Yes. A song you want to learn from is called a reference track. Register a song you have permission to upload and analyze, and you can use its sound characteristics as a guide. You can master without a reference too.

Try choosing a song with similar instruments and vocals. If the instruments or arrangement are very different, matching the numbers may not suit your music. Genre is a label for finding saved references; selecting it alone does not change the sound.

• Bass and treble feel: use the reference's balance of low and bright sounds as a guide.
• Loud/quiet difference: use the reference as a guide to gently reduce loud sounds.
• Stereo spread: use the reference's sense of space between the two speakers as a guide.

Start by following the bass and treble gently, and leave the others at 0%. 0% turns that part off. Changes that do not suit the sound or could harm it are skipped with a reason. This does not guarantee the same quality or identical sound.

Selecting a reference uses its settings instead of your manual EQ and compressor. You can still set whole-track loudness separately. Player C is a different song, so find the part you want yourself instead of following A and B.

Louder sound can easily seem better. We lower the louder version to compare original and result. Matching uses whole-track loudness, so short passages can still feel different in level.

Turn on Listen at similar loudness and switch between the same passage. If drums lose punch or the voice sounds harsh, try less processing. Changing listening volume here does not change the downloaded file.

Changing volume manually turns matching off. Turn the switch on to match again. If possible, also listen on your usual earphones and speakers.

• PASS: the file passed the checks you set. It is not a score saying the sound is better.
• REVIEW: something needs a look. For example, the result may be quieter than your target to prevent an overly loud peak. Read the reason and listen for yourself.
• FAIL: the file checks found a problem. Read the cause, such as silence or a damaged file, then try again with a different original or settings.

Integrated LUFS

The loudness of the whole track.

Short-term LUFS

Loudness measured in sections of about 3 seconds. The results table shows the highest value.

True Peak / Sample Peak

True Peak estimates the highest momentary level that may occur during playback. Sample Peak is the highest value stored in the file. They are different measurements.

LRA

Shows how much quiet and loud parts differ within the track. It is fine for this to vary between songs; very short tracks can be hard to compare reliably.

LUFS tolerance

Sets how far from the target is still within the loudness check range. With a target of −14 and ±0.5, the range is −14.5 to −13.5. Changing this alone does not change the sound. Other checks still matter too.

The clipping check looks for values that reach the sound limit. It does not detect every kind of distortion created earlier. Intentional silence at the beginning and end is not trimmed away. Automatic checks do not include a person's listening assessment.

WAV is a format for storing music. Unless you were asked for a particular format, you can use the default 48 kHz · 24 bit. At the same duration, 16 bit makes a smaller file. When needed, a tiny noise called dither is added during the final save to make errors from converting sound into numbers more even.

Converting MP3 to WAV or increasing the sample-rate number does not bring back sound that was already lost. Use the least damaged original you have.

New originals and references are accessible for 24 hours after upload completion by default; result WAVs for 24 hours after job completion. Reports and job records last 30 days by default. Check actual expiry times in the studio and download music you need to your device.

After expiry, you cannot play or download the file on the site, and it becomes eligible for server cleanup. Cleanup can be delayed, so we cannot promise every stored copy disappears at that exact time. Files already downloaded to your device stay there.

Delete results removes the selected result and files made from that result together. Delete all results linked to this original removes the server original and the results made from it together. It does not delete the original on your device. Deletion cannot be undone, so download the files you need first.

Give your settings a name and save up to 20 in your account. Sign into the same account to load them on another device. Your settings are not shared with other accounts.

Only sound settings are saved. Music files and reference choices are not saved with them, so choose those again. Reset settings returns the controls you are using to their defaults; it does not change result files already made.

Master each song first, then open Join multiple tracks and choose the order. It joins result files that have not expired and checks each track and the full file separately. It does not master the sound again.

During testing, the limits are 20 tracks, 15 minutes total and 1 GiB of input files combined. These limit server use; this is not an unlimited service. If you later add the music to a video, check that video's audio again. These checks do not guarantee YouTube's later processing results.

First check sign-in, file selection and permission to upload. See the studio notice for file size, duration and daily job limits. If the server is not ready, changing settings will not let you start.

You can cancel a job while it runs. Read the notice before retrying failed or cancelled jobs. A job may continue on the server after the connection drops, so check Recent jobs first.

Jobs and downloads do not require viewing or clicking ads. The studio has no ads, and ad settings stay off until the required reviews are complete.