How to Get Your Song Mixed and Mastered

What you're paying for: mixing vs mastering

Mixing is the job of balancing every part of the song against the others. The engineer decides how loud each element sits, carves out room in the frequency range so the vocal, kick, 808 and melody stop fighting, places parts in the stereo field, adds space with reverb and delay, and controls dynamics with compression so the vocal stays steady from the quiet verse to the loud hook. The mix is where most of the sound of a record is decided.

Mastering is the final step, applied to the finished stereo mix. It adjusts the overall tone, controls peaks, sets the final loudness for streaming, and makes sure the song translates on everything from earbuds to car speakers. Mastering polishes a good mix; it cannot fix a bad one. If the vocal is buried in the mix, no amount of mastering will bring it forward cleanly.

That's why the two are usually quoted separately, and why the price gap is large: mixing takes hours of decisions per song, while mastering a good mix is a shorter, more technical job. Many artists pay for both together; some mix themselves and only pay for mastering.

• Mixing = balancing the parts. Mastering = final polish and loudness of the whole song.
• Mastering can't rescue a bad mix. Fix balance problems at the mix stage.
• If your budget is tight, spend it on the mix first.

Your three options

Option one is hiring a mixing engineer, either at a studio or as a freelancer working remotely. You send your files, they mix, you give notes, they revise. The upside is a human who makes creative calls: riding the vocal on an emotional line, deciding the snare should be a little too loud because the song needs it. The downsides are cost, turnaround time (often days to a couple of weeks), and the fact that results depend heavily on finding the right person for your genre.

Option two is an online mixing and mastering service or marketplace, where you upload files and pick an engineer or a package. It is usually cheaper and more convenient than booking a studio, but quality varies widely and you still wait for a person to get to your song. Read the revision policy and listen to before-and-after examples in your genre before you pay.

Option three is AI mixing and mastering. You upload your track and the software balances, processes and masters it in seconds to minutes. It costs a fraction of a human engineer and you can try as many versions as you like. Its limit is creative judgment: it aims for a balanced, polished result and won't make the deliberately rule-breaking choice a great engineer sometimes makes. For demos, regular releases, content and simply hearing what your song can sound like, it is often the most practical choice, and a great way to hear a finished version before deciding whether to pay someone for a final pass.

• Engineer: most creative input, highest cost, slowest.
• Online service: convenient and mid-priced, but quality varies. Always check examples in your genre.
• AI: fastest and cheapest, unlimited tries, weaker on song-specific creative calls.
• Many artists use AI for most songs and a human engineer for the one single that really matters.

How much does mixing and mastering cost?

Prices vary enormously by engineer, genre, number of tracks and revisions, so treat these as rough ranges, not quotes. Budget freelancers start at around $50 per song for a mix. Experienced independent engineers commonly charge a few hundred dollars per song, and engineers with major-label credits charge four figures or more. Mastering is cheaper: roughly $25 to $150 per track from independent mastering engineers, more from well-known studios.

Several things push the price up: a high track count (a 60-track band session takes far longer than a vocal over a two-track beat), vocal tuning and editing, extra revision rounds, rush delivery, and extra versions such as an instrumental, a cappella, clean edit or performance version. Ask what's included before you agree. Some low prices only cover one revision or a simple vocal-over-beat mix.

AI tools are priced differently: usually a monthly subscription or a per-song fee that costs less than a single human mix, often with free mixes or a free trial to start. If you release a lot of music, that difference adds up quickly.

• Mixing: from about $50 per song (budget) to a few hundred (experienced independent). Mastering: roughly $25 to $150 per track.
• Track count, vocal tuning, revisions and rush delivery all raise the price.
• Confirm how many revisions and which versions (instrumental, clean, a cappella) are included.

How to prepare your files

Whoever mixes your song, a person or AI, can only work with what you send, so this step matters more than who you hire. Export every track as an uncompressed WAV file (24-bit is standard) at your session's sample rate. Avoid MP3s for the mix stage: they throw away detail you can't get back.

Export every stem from the very start of the session, even if the part only starts at bar 33. That way all files line up when they are dropped into a new session. Name them clearly (Lead Vocal, Ad-libs, 808, Kick, Snare, Hats, Pad) and note the tempo and key.

Leave headroom: no limiter or loudness maximizer on your master bus, and peaks on each file comfortably below 0 dBFS. Around -6 dBFS is a safe target. Remove processing you don't want baked in, but keep effects that are part of the sound, such as a distinctive guitar amp tone or a vocal delay throw that belongs to the arrangement. If you're unsure, send both a dry and a processed version of the vocal. Finally, clean up: cut noises you don't want, fade clip edges to avoid clicks, and make sure the vocal comp is final.

• Export uncompressed WAV, 24-bit, every file from the same start point.
• Name files clearly and note the tempo and key.
• No limiter on the master bus; peaks around -6 dBFS.
• Unsure about an effect? Send dry and processed versions.

How to brief the mix

The most common reason a mix comes back sounding 'wrong' is a vague brief. 'Make it sound professional' tells an engineer nothing. Instead, send one or two reference tracks, released songs in your genre whose sound you want to be close to, and say what you like about them: the vocal is very upfront and dry, the 808 is huge but clean, the whole thing is bright and wide.

Describe the sound in plain words. You don't need technical vocabulary: 'warmer', 'more air on the vocal', 'less muddy', 'punchier drums', 'the hook should feel bigger than the verse' are all useful notes. If your rough mix has something you love, like a delay throw or a filtered intro, say so, otherwise it may disappear.

Give feedback the same way when the first version comes back. Listen on at least two systems (headphones and a phone or car), compare it against your reference at the same volume, and write specific, timed notes: 'vocal too quiet in the second verse from 1:12', 'hi-hats a bit harsh'. Specific notes get you there in one revision instead of three.

• Send one or two reference tracks and say what you like about each.
• Plain words work: warmer, brighter, punchier, less muddy, more space.
• Give timed, specific notes on revisions.
• Compare at equal volume. Louder always sounds 'better' at first.

What to check before you approve the final

Before you sign off, check the essentials. Does the vocal stay clear and understandable all the way through? Does the low end feel solid on headphones without booming in a car? Does the song still sound balanced on a phone speaker? Does anything get harsh at higher volume? Then check the master: streaming services turn loud masters down, so a master pushed to the extreme gains nothing there and can lose punch. Aim for a loud, clean master, not the loudest possible one.

Confirm the practical side too. You should receive the final mix and master as high-resolution WAV files, plus any versions you agreed on. Make sure you own the result without extra licensing conditions, and keep your original session and stems backed up so you can remix later.

• Check on headphones, a phone speaker and in the car before approving.
• Streaming turns loud masters down: clean and punchy beats maximum loudness.
• Get high-resolution WAV files and keep your stems backed up.

Mixing and mastering your song with Seimix

Seimix is built for the AI route and gives you two ways to work. Preset Mix gives you a finished sound in one click: upload a track, pick one of 300+ presets (vocal chains, 808s, drums, mastering) and download the result. The Mixing Engineer is for when you want your own sound: upload a track and describe what you want in plain words, like 'warmer vocal with a bit more air' or 'punchier drums', and every message gives you a new version to compare and download.

Both work on one track at a time, whether that's a vocal, an instrument or a full bounce of your song, and the file prep rules above apply: clean WAV in, good mix out. Your first 3 mixes are free with an email sign-up, no card needed, so you can hear your song mixed before you decide anything. And if you later hire an engineer for a big release, you'll go in with a much clearer brief.

• Preset Mix: pick a ready-made sound, done in one click.
• Mixing Engineer: describe the sound in your own words and refine it by chatting.
• Your first 3 mixes are free, no card needed.