How to Export Stems That Get Approved
Prep your files so we can say "yes."
Let's talk about stems. Not the plant kind — the audio kind. If you're sending your track to ABMXXES for a professional MXXING, stems are everything. They're the individual tracks from your session — your drums, bass, vocals, guitars, synths, whatever — exported as separate files so an engineer can work with each one independently. Without them, there's nothing to MXX. With bad ones, your engineer has to spend time fixing your files instead of MXXING your song.
This post is for the artist who tracks in their DAW (Ableton, Logic, FL Studio, whatever), has a session that sounds decent, and knows it needs MXXING. You're probably wondering: what exactly do I send? How do I export? What could go wrong?
What Are Stems, Really?
Stems are the building blocks of your song, separated so someone else can work with them. If your track has an 808 pattern, a hi-hat loop, a bass line, three layers of vocals, and some ambient pad — that's five or six stems (maybe more if you've got doubles or ad-libs). Each stem is its own WAV file, soloed from your main session, bounced out clean and clear.
Why separate them? Because when an engineer has your kick by itself, they can EQ it, compress it, automate it, layer it — all without touching your hi-hats. They can make decisions on your vocal tone without the bass influencing how they hear it. Stems give control. Control is what professional MXXING is built on.
WAV Format, Not MP3
This is non-negotiable: export as WAV.
MP3 is lossy compression. Every time you encode an audio file to MP3, information is thrown away — information that your engineer will never get back. It's like writing a love letter in pencil, then photocopying the photocopy five times. The message is still there, but the edges are blurry.
WAV is lossless. What you bounce is what they get. Use it. Always.
How to Export Stems: The Right Way
Open your DAW. You're going to export each stem one at a time. Here's the process:
Step one: Mute everything except the track you're exporting. If you're exporting your kick, mute drums, bass, vocals, everything else. If you're exporting your full drum bus (which is fine), mute the non-drum tracks.
Step two: When you bounce, match your session's original sample rate. If you made the song at 44.1 kHz, export at 44.1 kHz. If it's 48 kHz, stick with 48 kHz. This keeps everything phase-aligned and prevents weird artifacts later.
Step three: Don't normalize during export. Normalization peaks your audio to 0 dB, which might sound good in isolation, but it can muddy the engineer's ability to hear relative levels between stems. They need to see your actual levels.
Step four: Leave headroom. This is critical. Your stems should peak around -6 dB to -3 dB, not slamming into 0 dB. Headroom gives your engineer space to work. It's the difference between handing someone a paintbrush with paint already on it and handing them a clean brush with a full palette.
Step five: Export as 24-bit or 16-bit WAV, depending on what your DAW recorded at. Either is fine.
Step six: Do this for every track or bus in your session.
Naming Conventions Matter
After export, name your files clearly. Not "audio_01.wav" or "stem.wav" or "untitled_mix_FINAL_v3_FINAL.wav."
Use names like:
- Kick.wav
- Snare.wav
- Hats_Closed.wav
- Bass.wav
- Vocals_Lead.wav
- Vocals_Ad_Libs.wav
- Synth_Pad.wav
- Guitar_Strums.wav
Be specific. Use underscores instead of spaces if your system prefers it. The engineer should be able to open your stem folder and immediately understand what they're looking at.
Common Mistakes That Cause Rejection
Baked effects: If your vocal stem has reverb and delay already on it because you liked how it sounded, that's a problem. Effects should live on separate return tracks or in the DAW's bus, not baked into the stem. When you export, bypass all send effects before bouncing.
Clipped audio: If your waveform is flatlined at the top, that's clipping. Your audio is distorted beyond recovery. This makes MXXING impossible. Check your levels. Keep them clean.
Empty or silent files: Sometimes you export a stem by accident and it's just silence. Play back your stems before you send them. Make sure they sound like what you intended.
Wrong sample rates: If some stems are at 44.1 kHz and others are at 48 kHz, the engineer has to convert them. That's a delay and potential quality loss. Keep it consistent.
MP3 files: Seriously. If we ask for WAV and you send MP3, it gets rejected. No exceptions.
You've Got This
The first time you export stems, it might feel like a lot of steps. The second time, it's routine. By the third time, you're not even thinking about it. You're just: mute, bounce, label, done.
This prep work saves your engineer time. More importantly, it saves you money — because the faster they can work, the less back-and-forth you deal with. And it saves your song from sitting in a rejection pile. Do the work right on your end, and the MXXING happens. Your track gets better. That's the deal.
Export clean. Label clear. Leave headroom. That's all.
Ready to send your stems?