Volume vs. Loudness: What Every Voice Actor Needs to Know About LUFS
I'm going to teach you a concept today that will instantly make you sound more professional in any conversation with an audio engineer, a casting director, or a client.
Volume and loudness are not the same thing.
I know — they sound identical. They are not. And understanding the difference is one of those "general level of understanding" skills every voice actor needs, even if you're never planning to become a full audio engineer yourself.
(See what I did there. 🎚️)
Volume Is What You SEE. Loudness Is What You HEAR.
Here's the simplest way I can explain it:
Volume — measured in dBFS (decibels relative to full scale) — tells you how tall the waveform is on your screen. It's a measurement of electrical signal strength. Peak meters show you volume.
Loudness — measured in LUFS — tells you how loud something actually FEELS to a human listener over time.
Here's why that distinction matters enormously: two files can have completely identical peak volume and sound wildly different in perceived loudness. A whispery, dynamic narration and a punchy, compressed commercial read could both peak at the exact same level on a meter — and one will sound noticeably quieter to a human ear than the other.
Your ear doesn't experience sound the way a peak meter measures it. LUFS was built specifically to close that gap.
What LUFS Actually Stands For
LUFS = Loudness Units relative to Full Scale.
It's a standardized measurement that accounts for how humans actually perceive sound — factoring in frequency sensitivity, not just raw signal strength. This is why LUFS has become the global standard across streaming platforms, podcasts, broadcast television, and film for measuring and controlling loudness.
You'll sometimes see it written as LKFS in certain broadcast contexts — same measurement, different naming convention depending on the standard being referenced.
There are three flavors of LUFS worth knowing:
Integrated LUFS — the overall average loudness of an entire file, start to finish. This is the number most platforms and clients actually care about for delivery and compliance.
Short-Term LUFS — loudness measured over a rolling few-second window. Useful for spotting inconsistency within a read.
Momentary LUFS — a near-instant reading, capturing sudden peaks or bursts.
For most voice actors delivering finished files, Integrated LUFS is the number you need to know and hit.
Why This Matters For YOUR Auditions and Deliverables
Here's where this stops being theoretical and starts being practical:
Different platforms and clients expect different loudness targets. Submit an audiobook chapter mastered for podcast loudness, and it may get flagged or rejected. Submit a commercial VO file mastered for audiobook loudness, and it might sound noticeably weak next to a properly leveled file.
Knowing your target — and hitting it — is part of delivering professional, broadcast-ready work. It's no different than knowing the correct file naming convention or the correct format. It's a delivery standard. And missing it costs you credibility, even when your performance was excellent.
The Industry Standard Just Made This Easier (And Free)
Here's something worth knowing if you don't already: Source Elements — the company behind Source-Connect, which has been the gold standard for remote recording and collaboration in this industry since 2005 — recently launched something called Recorder.
It's browser-based. No install, no plugins. You open a tab, pick your microphone, and you're recording studio-grade audio. It's free for every Source Elements community member.
Here's the part that matters most for what we're talking about today:
When you set up a session, you pick what you're recording FOR — Voice Acting, Audiobook, Commercial, or Custom — and the Recorder automatically conforms your take to match that spec. A simple meter glows green the moment your read lands in the loudness sweet spot, live, while you're performing. When you're done, you get both the raw file AND a conformed version, properly leveled and labeled, ready to send.
There's a line in their own materials that I think every voice actor should read twice:
Because it matches industry-established loudness targets in one click, it ensures performers compete on the quality of their read — not their decibels.
Read that again.
Compete on the quality of your read. Not your decibels.
That is EXACTLY the point of this entire post. Loudness should never be the reason an audition gets passed over. It's a technical bar to clear — not a creative choice, and definitely not something that should be working against you because you didn't know it mattered.
If the company that built the literal industry-standard tool for remote broadcast recording considers loudness conformity important enough to build a free tool specifically to solve it... that should tell you everything about how seriously the professional side of this industry takes it.
Want the Deep Dive From Someone Who Lives In This World Daily?
I'm giving you the voice actor's "general level of understanding" here — enough to know what's happening and why it matters. But if you want the full technical breakdown from someone who works with this stuff at an expert level every single day, go read Frank Verderosa's take on the Source Elements Recorder launch.
Frank is an award-winning audio engineer and voiceover casting director — he casts, mixes, and sound designs for major ad agencies and networks, and he also coaches and consults with voice actors on exactly this kind of technical workflow.
In his article, he digs into something I didn't even get into here: the YEARS of headaches voice actors dealt with around sample rate mismatches — GarageBand recording at 44.1kHz while the industry standard sits at 48kHz, and the workaround scramble that caused for remote sessions using Restore and Replace. He explains why Recorder genuinely solves a problem that's been quietly frustrating remote voice actors for a long time.
(He also confirms it works on your iPhone, which honestly might be the detail that gets some of you to finally try it.)
And if you want to go even deeper — Frank runs a small-group remote recording bootcamp called The Connection Clinic, where he does live, hands-on walkthroughs of Source-Connect, Nexus, and tools exactly like the new Recorder. Worth checking his events page if you want guided, practical training rather than another YouTube video that doesn't match your actual workflow.
Common LUFS Targets You Should Know
Here are general industry-standard targets, compiled from reputable broadcast and platform sources:
🎙️ ACX Audiobooks (Audible) — Audible's published spec for audiobooks accepts a range, generally falling between roughly -23 and -18 LUFS Integrated, alongside specific peak and noise floor requirements.
🎙️ Podcasts — Common targets cluster around -16 to -19 LUFS Integrated for stereo content, sometimes adjusted for mono delivery.
🎙️ Broadcast (EBU R128 — European standard) — -23 LUFS Integrated, with a true peak ceiling of -1 dBTP. This has become a widely referenced international benchmark even outside Europe.
🎙️ US Broadcast/Streaming (AES guidance) — Recommendations in the -20 to -16 LUFS range depending on content type, reflecting a more dynamic, less "loudness war" approach than older broadcast standards.
🎙️ Streaming Platforms (Spotify, YouTube, Apple) — Typically normalize incoming audio toward roughly -14 to -16 LUFS Integrated, depending on the platform.
(Important: ALWAYS check the specific spec sheet for your client or platform. These are general industry reference points, not universal law. When in doubt — ask, or have a professional engineer confirm before delivery.)
You Don't Need to Become a Mastering Engineer
Here's the reassurance I want to leave you with:
You don't need a degree in audio engineering to handle this. You need a general working understanding — enough to know what your software is telling you, enough to ask the right questions, enough to recognize when a file needs professional attention before you hit send.
Most modern recording and editing software includes LUFS metering. Learn where it lives in your DAW. Learn how to read an Integrated LUFS measurement after a take. And when a client or platform gives you a specific LUFS target — treat it exactly like you'd treat a file naming convention or a turnaround deadline.
It's not creative. It's professional delivery. And professional delivery is part of the job.
Want Help Getting Your Levels Right?
Audio quality assessment — including loudness, noise floor, and overall mix evaluation — is something I work through with coaching clients regularly. If you want a trained ear on your home studio output...
