The Pro Audio Suite – Rooms: Why Size (and Shape) Matters
The Pro Audio SuiteSeptember 22, 2025x
34
00:12:5023.67 MB

The Pro Audio Suite – Rooms: Why Size (and Shape) Matters

This week the guys take a quick dive into one of the biggest factors that can make or break your booth sound: the room itself. From walk-in wardrobes to DIY blanket forts and even apartments in Rome, we talk about what really matters when it comes to room size, shape, reflections, and treatment. Spoiler alert: bigger isn’t always better, but dead is definitely good. Thanks to our sponsors TriBooth (use code TRIPAP200 for $200 off) and Austrian Audio – making passion heard. Edited by Andrew Peters. Mixed by Robbo. Recorded via Source Connect with tech support from George “The Tech” Whittam. Got your own audio issues? JustAskRobbo.com. Join the conversation in our Facebook group or drop us a note at theproaudiosuite.com.
voiceover booth, recording booth, room acoustics, voice acting tips, home studio setup, soundproofing, Pro Audio Suite, George the Tech, TriBooth, Austrian Audio
#ProAudioSuite #VoiceOver #HomeStudio #RecordingBooth #TriBooth #AustrianAudio #SourceConnect

00:00:00
(Transcribed by TurboScribe.ai. Go Unlimited to remove this message.) Hey, and welcome to the Pro Audio Suite.

00:00:05
Yeah, starring Robert Marshall.

00:00:10
Funky dude with him.

00:00:15
That's ridiculous.

00:00:16
Like my carpeting is starting to shag out.

00:00:19
That's right.

00:00:20
That's right.

00:00:22
You're, you're tough to groove.

00:00:26
Exactly.

00:00:27
My shirt is now puffy with hair.

00:00:30
We need a laugh right now.

00:00:33
Yeah, exactly.

00:00:35
That'll make you smile.

00:00:37
And we should thank our sponsors, Austrian audio,

00:00:40
making passion heard and tribe booth.

00:00:42
Don't forget the code T R I P

00:00:43
a P 200 to get $200 off your

00:00:46
tribe booth.

00:00:47
They're talking about booths.

00:00:49
Um, there's a few bits and pieces of

00:00:50
popped up online.

00:00:51
One in particular I saw this morning, uh,

00:00:54
visually it looked absolutely awful, but according to

00:00:59
Robo, it sounded really good.

00:01:00
Um, so what is the key to a

00:01:03
booth and what makes it work?

00:01:05
Well, according to us, it sounds really good

00:01:07
because the person we're talking about has actually

00:01:09
been on the show, but you know, I

00:01:11
think it's pretty obvious really, isn't it?

00:01:13
Zero reflections and as little noise as you

00:01:17
can possibly let into a recording.

00:01:20
And a good spot in the house.

00:01:22
That's going to give you the best possibility

00:01:24
of doing that.

00:01:26
You know, like I think today's booth is,

00:01:28
is in the middle of the house.

00:01:29
It's in a walk-in wardrobe.

00:01:30
So it's away from open windows and, and

00:01:33
all the rest of it.

00:01:34
And probably the noisest noisiest spot is going

00:01:37
to be whatever comes in through the roof,

00:01:38
through the plasterboard in the ceiling.

00:01:41
Um, or if you may, my wife talking

00:01:43
in the background while I'm recording the podcast

00:01:45
as well, that will do it.

00:01:48
I actually built one.

00:01:50
It was a temporary thing I put together

00:01:52
when we're traveling.

00:01:54
And by all accounts, it should not have

00:01:56
worked.

00:01:57
It should have been awful, but it sounded

00:01:59
really good.

00:02:00
And it was like a, a cupboard in

00:02:02
a, an apartment in Rome.

00:02:04
When Rome is very noisy, but it was

00:02:07
like tucked in the middle of the apartment.

00:02:08
It had a bunch of shelves with a

00:02:11
few blankets and bits and bobs on, I

00:02:14
popped on the shelf, the Porter booth.

00:02:17
Then on to my side, there was like

00:02:19
a clothes rack, which I threw another blanket

00:02:21
over and someone was hanging some stuff off

00:02:25
the back of the door from memory.

00:02:27
Anyway, it sounded amazing.

00:02:29
It was what perfectly looked like shit, but

00:02:31
sounded good.

00:02:33
So two questions about it.

00:02:34
How big was the space and how parallel

00:02:37
were the hard surfaces?

00:02:39
The surfaces were parallel.

00:02:41
The ceiling was probably 12 foot ceiling in

00:02:42
there.

00:02:44
Uh, and then there were shelves where I

00:02:45
sort of put the Porter booth on the

00:02:47
shelf, but there were, there's all sorts of

00:02:48
other bits and pieces in there to my

00:02:50
left was the clothes rack that I put

00:02:52
a blanket over.

00:02:54
Then behind me was the door, which had

00:02:56
stuff hanging off the back of it, but

00:02:57
to the right, there was no treatment at

00:02:59
all.

00:02:59
It was just plasterboard.

00:03:01
And how far back was the door behind

00:03:02
you?

00:03:03
Was it?

00:03:04
Well, it was a rectangle.

00:03:06
So it was probably a meter wide and

00:03:11
probably depth would be two and a half

00:03:13
meters, I guess.

00:03:15
So pretty good depth.

00:03:16
The, the width wasn't awesome, but the depth

00:03:19
was pretty good because I, I think that

00:03:22
a lot of what makes booths, like the

00:03:25
first thing is it's got to be dead.

00:03:27
And then once it's like, you know, not,

00:03:29
not considering how loud or noise isolated it

00:03:33
is, but just the sound of the booth

00:03:34
itself.

00:03:34
The first thing is you got to deaden

00:03:36
everything and people don't realize what it takes

00:03:39
to do that properly.

00:03:40
It takes thick, like, you know, not, not

00:03:43
really thin absorption because a lot of the

00:03:45
thin absorption lets all those low frequencies through.

00:03:48
So it's got to have some thicker absorption.

00:03:50
And the smaller the booth, the thicker the

00:03:52
treatment you need.

00:03:53
So it's, it works against you.

00:03:55
So as it gets smaller, it gets smaller.

00:03:58
Yeah.

00:03:58
You lose more space basically.

00:04:01
But if the booth is big, the sound

00:04:04
becomes much more neutral because the nodes don't

00:04:07
get as intertwined and as amplified as well,

00:04:12
especially in the, in those lower frequencies that

00:04:14
really get up into the voice range.

00:04:17
So a booth that has a good volume

00:04:20
of air and is dead, I think will

00:04:23
sound better than any small booth.

00:04:26
And then if you can't have a good

00:04:28
volume of air, the next thing that can

00:04:30
help is non-parallel surfaces can kind of

00:04:34
fake a bigger volume, you know, it can

00:04:37
create more, what's the word oblique reflections I

00:04:41
think is, is that the word George?

00:04:43
So yeah, it's size matters.

00:04:46
Yeah.

00:04:46
Well, I mean, having angled walls and stuff,

00:04:49
the thing that's a difficult about the angle

00:04:52
wall thing is it's not predictable.

00:04:55
So you may end up getting really lucky

00:04:57
or really unlucky.

00:04:59
And then if it doesn't sound great, it

00:05:02
can bounce it right back in the mic

00:05:03
and with the wrong angle, right?

00:05:05
Yeah, that's right.

00:05:06
And sometimes they, so they create more, they're

00:05:09
harder to model.

00:05:10
Meaning like you, it's harder to take like

00:05:14
a pentagonal floor plan or something with more

00:05:16
sides and shove that into, you know, a

00:05:19
computer and say, tell me what frequencies I

00:05:22
have to worry about.

00:05:23
It's, it's much harder.

00:05:24
So then it just becomes a lot more,

00:05:26
exponentially gets more complex.

00:05:28
Yeah.

00:05:28
So, I mean, I mean, a lot of

00:05:30
people have a very haphazard way of treating

00:05:32
their booths anyway.

00:05:33
It's a lot of trial and error to

00:05:35
begin with.

00:05:35
That's, you know, when you see product booths,

00:05:38
like the one we're talking about and so

00:05:40
many other home booths is they didn't map

00:05:42
out the room then by blankets, mattresses, and

00:05:46
foam.

00:05:47
They just sort of eventually get to a

00:05:50
point where it sounds good.

00:05:52
It's almost never a, well, I bought all

00:05:54
this stuff and stuck it up.

00:05:55
And Oh, wow.

00:05:56
It sounds good.

00:05:56
It usually takes time and adding and tweaking.

00:06:00
So when you have a non-square or

00:06:02
non-rectangular floor plan, that just is harder

00:06:05
to do.

00:06:05
Um, but yeah, it's, it's not hard if

00:06:08
the room is larger because larger rooms.

00:06:10
Yeah.

00:06:10
As Robert was saying, they don't build up

00:06:13
such standing waves.

00:06:15
These are called room modes.

00:06:17
Those are the things that make you sound

00:06:19
like you are in a box or in

00:06:21
a tube.

00:06:22
If those big spaces don't have them, they

00:06:24
really only have reverb, which is that long

00:06:28
tail.

00:06:28
And then if you deaden all the walls

00:06:30
up, you don't have the reverb.

00:06:31
You don't have the long.

00:06:33
Well, not only that, but when you're bigger,

00:06:35
when you have a big room, the deadening

00:06:37
of the walls is much simpler because it's

00:06:40
really just covering large amounts of area with

00:06:43
soft material.

00:06:45
It's when the room gets smaller and smaller,

00:06:47
you can't just put blankets or foam on

00:06:50
the walls anymore because you need much thicker,

00:06:52
denser material or really thicker to trap low

00:06:56
frequencies.

00:06:57
So it gets trickier and trickier as a,

00:06:59
as it gets smaller and smaller and ends

00:07:02
up being the panels out to be thicker

00:07:03
and thicker.

00:07:04
One studio I went into this years ago

00:07:07
and it was, they just built a new

00:07:08
studio and they had like a foot in

00:07:12
diameter tubes that stood on their ends and

00:07:14
in the corners.

00:07:15
Yeah.

00:07:15
They're called tube traps.

00:07:17
Were they on their own stand?

00:07:19
They were, they were basically like on their

00:07:20
own mic stand and they're just like around.

00:07:22
Well, they were floor to ceiling basically.

00:07:25
Yeah.

00:07:25
Oh wow.

00:07:26
Those are interesting.

00:07:27
The tube traps are really great products, but

00:07:29
what's interesting about them is that they have

00:07:30
a reflective side and an absorbing side and

00:07:34
part of their trick is to diffuse and

00:07:36
scatter the sound or to absorb it.

00:07:40
And it depends on how you arrange them.

00:07:43
One of the chamber reverbs at Abbey Road

00:07:45
has columns in it for exactly the opposite

00:07:48
reason.

00:07:48
It's got like sort of concrete pillars and

00:07:51
stuff.

00:07:51
So you can mic around them and get

00:07:54
all sorts of different sort of room verby

00:07:56
sounds.

00:07:57
Create bounces.

00:07:58
Yeah.

00:07:58
Create different bounces and stuff.

00:08:00
Create reflections.

00:08:00
For exactly the opposite reason.

00:08:02
But yeah, it's very cool.

00:08:04
Yeah.

00:08:04
I've seen and been in some rooms with

00:08:06
tube traps.

00:08:07
Well, I mean, an interesting type of diffuser

00:08:09
is the curved.

00:08:11
Yeah.

00:08:11
I mean, they work really well too.

00:08:13
Like one diffuser that everyone's really used to

00:08:15
is the one that's like different depths of

00:08:17
squares that are at different depths.

00:08:19
And those are usually referred to basically usually

00:08:22
as quadratic diffusers.

00:08:24
But the other one is just a curved

00:08:26
surface and that has a bunch of different

00:08:28
levels that the sound can bounce off of

00:08:30
and go into different directions and cheap, easy

00:08:33
way to make diffusion.

00:08:34
Yeah.

00:08:35
I've been some great.

00:08:36
It's curved convex, not concave.

00:08:38
Curves have to be convex.

00:08:39
Yeah, that's really important.

00:08:40
So the curves have to be protruding outward

00:08:43
toward you, not inward away from you.

00:08:47
That's those those are much more of a

00:08:49
problem.

00:08:49
So you don't want those curves to focus

00:08:52
sound in a parabolic way, like a dish

00:08:55
antenna for a satellite.

00:08:56
You know, those are designed to focus.

00:08:58
George, have you ever been to the the

00:09:00
museum here in Chicago?

00:09:02
There's the Museum of Science and Industry, and

00:09:04
there's a display that has.

00:09:07
I mean, you're like 50 feet away from

00:09:10
each other, but you're standing in the perfect

00:09:12
focal point of two 50 feet away to

00:09:15
like parabolic disks.

00:09:17
And you can whisper to each other and

00:09:19
there can be 50 people in between you

00:09:21
and you can talk to each other.

00:09:23
It's crazy.

00:09:24
Yeah, it's really cool.

00:09:25
Up the top of St. Paul's Cathedral, you'll

00:09:27
get the same thing.

00:09:28
You got the whispering sort of wall up

00:09:30
there, the whispering dome.

00:09:33
Oh, I love that.

00:09:34
Yeah, yeah, that's really neat.

00:09:35
Even in a I don't know if you've

00:09:36
been to many planetariums.

00:09:39
It's really cool in a planetarium.

00:09:42
Well, maybe not cool, but sometimes you'll be

00:09:44
able to eavesdrop in on a conversation on

00:09:47
the other side of the planetarium.

00:09:49
I mean, you just hear.

00:09:50
Because it just bounces around the curve of

00:09:52
the outside wall.

00:09:52
Yeah.

00:09:53
And then you'll be you'll hear a voice.

00:09:54
It's the more close to the edge you're

00:09:56
sitting, the better.

00:09:57
So like your way towards the back or

00:09:58
the edge.

00:09:59
It's like crazy.

00:10:00
You'll hear a conversation like almost like they're

00:10:02
sitting next to you and they're all the

00:10:05
way on the other side.

00:10:06
It's pretty trippy.

00:10:08
It's really interesting.

00:10:09
Because like what what the diffuser, what the

00:10:11
convex part diffuses, the concave part focuses.

00:10:15
So make sure your current diffusers, if you're

00:10:18
going that way, are convex.

00:10:20
You guys want to troubleshoot Austin Keyes's studio

00:10:23
on the show?

00:10:24
Sure, we can continue from today.

00:10:28
Let's let's dive in.

00:10:29
Well, he says I can't record as I

00:10:31
want.

00:10:31
I can't record his 416, right?

00:10:32
He's texting me right now.

00:10:34
He can't use his 416, so he doesn't

00:10:37
know what to do.

00:10:38
Oh, my God.

00:10:40
But I left him working.

00:10:43
So Robert graciously took an emergency call for

00:10:47
this client of mine this morning.

00:10:49
Paul was in a meeting and he just

00:10:52
doesn't know the topology of the studio and

00:10:54
has no idea what's there.

00:10:55
And he tried his best, but the client

00:10:57
didn't didn't tell Robert I have a Mackie

00:10:59
mixer in my booth also.

00:11:02
So so to wrap up that conversation, I

00:11:05
would say the best way to wrap that

00:11:07
up would be.

00:11:10
It's not how it looks and how it

00:11:11
sounds, and we are we all know what

00:11:13
it's supposed to sound like.

00:11:14
And if you don't know, let us know,

00:11:16
because we spend our days day in, day

00:11:18
out listening to all of your studios.

00:11:21
And, you know, as long as you're not

00:11:23
appearing on camera for like an animation gig,

00:11:25
because here in the States, definitely like in

00:11:27
a lot of people are doing remotely directed

00:11:30
animation and they're on Zoom calls all the

00:11:32
time.

00:11:32
And you may not want it to look

00:11:34
too bad.

00:11:35
But remember, it only has to look good

00:11:36
in the frame of your Zoom, of your

00:11:38
webcam.

00:11:39
So if the whole place is a mess,

00:11:42
but you have a really pretty, you know,

00:11:45
tapestry on the wall behind you, then you're

00:11:48
good.

00:11:49
Yeah.

00:11:49
Yeah, true.

00:11:50
The illusion, the illusion.

00:11:52
And if not for the for the lowest

00:11:54
fee possible, George, the tech will send you

00:11:56
a background that you can use as a

00:11:58
fake background for a studio in your Zoom

00:12:01
meeting.

00:12:04
Right.

00:12:04
With GTT on it.

00:12:06
Yes.

00:12:07
And the walls.

00:12:09
Every GTT room looks the same, but they

00:12:12
sound different.

00:12:13
And that'd be fun.

00:12:14
Yes, that's right.

00:12:16
Well, that was fun.

00:12:17
Is it over?

00:12:19
The Pro Audio Suite.

00:12:21
With thanks to Triboo and Austrian Audio.

00:12:24
Recorded using Source Connect.

00:12:25
Edited by Andrew Peters.

00:12:27
And Mixed by Robbo.

00:12:28
Got your own audio issues?

00:12:30
Just ask Robbo dot com.

00:12:32
With tech support from George the Tech Whittam.

00:12:34
Don't forget to subscribe to the show and

00:12:36
join in the conversation on our Facebook group.

00:12:38
To leave a comment, suggest a topic or

00:12:40
just say g'day, drop us a note at

00:12:42
our website, theproaudiosuite.com