Ask four questions before you send money: what exactly gets delivered, how many revisions are included and what counts as one, how long the turnaround is, and whether the engineer or someone else is mastering. Everything else is taste. Those four are where nearly every unhappy mixing job in this city actually goes wrong, and all four can be settled in one email. If you want a fifth, ask for a paid test mix on one song before booking a record.
Why is a portfolio the weakest way to choose?
Because a finished record hides the variables you are buying.
You are hearing a song someone else wrote, a performance someone else got, a room someone else recorded in, and a master someone else applied. A great sounding link tells you the engineer worked on a good project. It does not tell you how they handle a session with drifting tuning, a vocal recorded in a bedroom, or a client who changes their mind in week three, which is the actual job most of the time.
What a portfolio is good for is range. If everything sounds like the same genre at the same density and your record is nothing like it, that is a real signal.
How do you verify credits in Los Angeles?
Credits in this town are claimed more often than they are documented, so check them against a database built from label metadata rather than from the person.
Three that are quick. AllMusic lists label-supplied credits per release. Muso.AI aggregates verified credits and is the one most people in the industry check first. And the retailer metadata itself, for example a release page on Qobuz, often lists composer, producer, mixing and mastering roles line by line, straight from the distributor.
The honest caveat: all three carry errors, sometimes large ones, because they are built from metadata that nobody proofreads. A credit missing from a database is not proof of a lie, and a credit present in one is not proof of the role. Ask directly what the person actually did on the record, in one sentence, and see whether the answer is specific.
What are the four questions that matter?
1. What is the deliverable, exactly? The answer should be a list, not a word. A normal mixing delivery is the mix at session sample rate and bit depth, an instrumental, a version with backing vocals but no lead, a TV mix if there is any chance of a sync placement, and the mix at unity with no bus limiter so a mastering engineer has something to work with. If the answer is "a wav file," you will be paying again in three weeks. The Producers and Engineers Wing publishes delivery recommendations worth reading before you write the brief.
2. How many revisions, and what counts as one? "Unlimited revisions" is not generous, it is undefined, and undefined always ends badly. The workable version: two or three rounds included, one round means one consolidated list of notes, and structural changes such as new parts or a re-arrangement are a new job. Both sides should be able to say what round they are on.
3. What is the turnaround, and when does the clock start? It starts when complete files arrive, not when the deposit clears. Ask what "complete" means, because half the delays in this business are a session missing a vocal comp.
4. Who masters it? Some engineers include mastering, some hand it off, and either is fine as long as it is decided upfront. What is not fine is a mix delivered already limited into a mastering chain nobody agreed to.
Is a paid test mix worth it?
Yes, and it is the cheapest insurance available.
One song, paid, at the normal rate. You learn what you cannot learn any other way: how they read your notes, how fast they respond, what their first pass gets right without instruction, and whether working with them is pleasant. A record is six to ten weeks of correspondence, and personality is a technical specification.
Two conditions make the test meaningful. Send the same brief you would send for the album, including references and timestamped notes, so you are testing the real workflow. And pick a mid-difficulty song rather than the single. The single is the one everyone tries hardest on.
Does location inside Los Angeles County matter?
Less than people think for mixing, and more than people think for tracking.
Mixing is largely a remote craft now, and the engineer's room matters more than its address. For attended sessions, geography turns into hours. A studio in Burbank or Glendale sits inside the Valley and next to the Media District, so a session there is a short drive from Warner Bros., Disney and Universal, and parking is a non-issue. A room on the west side is a different afternoon entirely if you are coming from Pasadena at five o'clock.
For remote work the question is not distance but overlap. If your artist is in Kyiv and your engineer is in California, there are about three usable hours a day when both are awake, and a project that needs live approval calls should be scheduled around those hours from the start.
What are the actual red flags?
A quote with no scope attached. A promise of a specific outcome, since nobody can guarantee how a mix will land. Refusal to name a revision policy. Reluctance to say what is delivered. A rate far under the market with no explanation, which usually means volume work and a template. And an engineer who will not tell you what they would do differently with your song, because that answer is the one that shows whether they listened.
One more, specific to this city: anyone who talks mostly about the rooms they have been in rather than the records they finished.
What should you send when you first write?
Keep it to five lines. One sentence on the project, the number of songs, a link to a rough mix, your two references, and your deadline. Rate questions get better answers when the person can hear the material.
If you want the money side first, I wrote separately about [what mastering costs here](/journal-mastering-cost-la.html), itemised rather than given as a single number. My room is in Burbank, sessions are attended or remote, and the deliverables list above is what I hand over as standard. The records are on the [credits page](/credits.html).