Preparing Multitracks: How to send Files to a Mixing Engineer

One of the most overlooked parts of the mixing process happens before the mix even begins.

File preparation.

No amount of skill, experience, or equipment can fully overcome poorly prepared multitracks. When files are organized properly, mixing becomes efficient, creative, and focused. When they aren’t, time is wasted solving preventable problems.

If you want the best possible result for your song, proper multitrack preparation is essential.

This guide explains exactly how to do it.

What Are Multitracks?

Multitracks are the individual audio files that make up your song.

Each instrument and vocal should exist as its own file.

Examples:

• Kick.wav

• Snare.wav

• Bass DI.wav

• Lead Vocal.wav

• Guitar L.wav

• Guitar R.wav

Not:

• Drums.wav

• Instrumental.wav

• Full Mix.wav

The mixing engineer needs full control.

Export Everything From the Same Starting Point

This is one of the most critical steps.

Every file must start at the exact same timestamp, usually the very beginning of the session (bar 1 beat 1), even if the part doesn’t play until later.

This ensures all tracks line up perfectly when imported.

Incorrect:

Lead Vocal starts halfway through file

Correct:

Lead Vocal file starts at session beginning with silence before performance

This allows immediate synchronization.

Export at Full Resolution

Always export files at their original recording resolution.

Preferred:

24-bit WAV

or

32-bit float WAV

Sample rate:

Whatever the session was recorded at (44.1kHz, 48kHz, etc.)

Do not convert unless requested.

Never send:

• MP3

• AAC

• or other compressed formats

These permanently reduce audio quality.

Do Not Normalize Files

Normalization changes gain relationships and removes important headroom information.

Leave files exactly as recorded.

The mixing engineer will handle gain staging properly.

Remove Processing Unless It Is Intentional

This is one of the biggest mistakes artists make.

If you added plugins while recording just for monitoring — remove them.

Examples:

• EQ

• Compression

• Limiters

• Maximizers

  
  

Exceptions:

Creative effects that define the sound:

• Guitar amp sims

• Sound design effects

• Special delays or reverbs that are part of the production

When in doubt:

Provide both versions.

Example:

Lead Vocal Dry.wav

Lead Vocal FX.wav

Clearly Label Every File

This is extremely important.

Bad:

• Audio_01.wav

• Track 7.wav

Good:

• Kick In.wav

• Kick Out.wav

• Snare Top.wav

• Lead Vocal.wav

• Harmony L.wav

• Bass DI.wav

Professional labeling speeds up workflow and prevents confusion.

Consolidate Tracks

Each track should be one continuous file.

Not dozens of small clips.

Most DAWs have a:

Consolidate

Bounce

or

Export track function

Use it.

This ensures stability and compatibility.

Include Your Rough Mix

Always include your rough mix.

This helps communicate:

• Your vision

• Your balance preferences

• Your creative direction

This is not used as a technical reference, but as an emotional one.

Label it:

SongName Rough Mix.wav

Remove Master Bus Processing

This is critical.

Disable any processing on the master bus before exporting multitracks.

This includes:

• Limiters

• EQ

• Compression

• Clipping

• Saturation

These processes belong to mixing and mastering.

Not file delivery.

Do Not Clip

Check your tracks for clipping.

If anything is distorted unintentionally, fix it before exporting.

Clipping cannot be undone later.

Organize Your Files Into Folders

Professional submission example:

Song Name

Audio Files

Drums

Kick.wav

Snare.wav

Bass

Bass DI.wav

Guitars

Guitar L.wav

Vocals

Lead Vocal.wav

Harmony.wav

Reference

Rough Mix.wav

Export Time-Based Effects Separately (My Personal Preference)

This is where I get specific.

If your production relies heavily on delay throws, reverbs, or special effects, I prefer receiving those printed as their own tracks.

Example:

• Lead Vocal.wav

• Lead Vocal Delay Throws.wav

• Lead Vocal Reverb.wav

This allows maximum flexibility while preserving your creative intent.

Do Not Send Stereo Instrumental Mixes Unless Requested

Always provide individual tracks.

Not:

• Beat.wav

Instead:

• Kick.wav

• Snare.wav

• 808.wav

• Hi Hat.wav

• Melody.wav

This allows proper mixing.

What Happens If Files Are Not Prepared Properly

Improper multitracks create problems like:

• Timing errors

• Missing audio

• Noise issues

• Gain problems

• Phase issues

This slows down the process and can affect the final result.

Proper preparation ensures the best outcome.

My Personal Submission Preferences at Theta Wave Audio

Here is exactly what I prefer:

• 24-bit or 32-bit WAV files

• All files starting at session beginning

• Clearly labeled

• No master bus processing

• Dry files preferred

• Effects printed separately if important

• Rough mix included

• Organized folder structure

Final Thoughts

Preparing multitracks properly is not just a technical step.

It’s part of the creative process.

It ensures your song can be mixed efficiently, accurately, and at the highest possible quality.

When done correctly, it allows the mixing process to focus on what matters most:

Making your song sound its best.

This part of the process is extremely important to me and will facilitate a faster/cleaner process with less emails or phone calls about whether a track belongs or is playing in the correct spot.

If you have ANY questions about this, I encourage you to contact me before submitting projects to me. I am always glad to help because this is going to help me ALOT.

Cheers,

Cory