Home studio acoustics is not something you can fix by guesswork.

If Episode 1 was about choosing the right room, Episode 2 is about understanding what is actually happening inside your room — and for that we need measurements.

The tool I will be using throughout this entire series is REW (Room EQ Wizard).

It is free, incredibly powerful, and widely used by both home studio producers and professional acoustic engineers.

What is REW and Why It Matters

REW (Room EQ Wizard) is a measurement software that allows you to analyze how your speakers behave inside your room.

And this is an important distinction:

We are not measuring the speakers themselves —

we are measuring the speakers inside the acoustic environment of the room.

This includes:

• room modes

• reflections

• frequency response

• time behaviour of sound

Understanding this is the foundation of good home studio acoustics.

Measurement Basics

To measure your room with REW, you need:

• a measurement microphone (e.g. Earthworks, UMIK-1)

• a calibration file for the microphone

• your speakers

• your listening position

The basic process is simple:

REW sends a frequency sweep from around 20 Hz to 20 kHz through your speakers.

The microphone captures how that signal behaves inside your room.

From that, REW generates a frequency response curve.

What Are We Measuring?

There are two main types of measurements we are interested in.

1. Frequency Response

This shows how balanced your speakers sound in your room.

You will typically see:

• peaks (too loud frequencies)

• dips (missing frequencies)

Most of these issues come from room acoustics, not the speakers themselves.

2. SPL (Sound Pressure Level)

This measures loudness.

It helps you:

• calibrate your listening level

• ensure consistent monitoring conditions

Understanding a Measurement

In REW, you typically measure:

• left speaker

• right speaker

• both speakers together

This gives you a clear overview of how your system behaves.

For example:

• red curve → both speakers

• green → left speaker

• blue → right speaker

This allows you to identify imbalances between speakers and room interaction.

The Most Important Insight

One of the most important things I learned:

We are not fixing the entire frequency spectrum.

We focus mainly on:

20 Hz – 300 Hz

Why?

Because this is where:

• room modes exist

• the biggest problems occur

• acoustic treatment has the biggest impact

Everything above that is heavily influenced by:

• listening position

• reflections

• small movements

Trying to “EQ” the entire spectrum often leads to unnatural results.

Using REW’s EQ Feature

One of the most powerful features in REW is the EQ section.

After a measurement, REW can generate:

• a target curve

• suggested EQ filters

• a predicted corrected response

This allows you to linearize your system.

You can then export these EQ settings and use them in:

• DSP software

• monitor calibration tools

• TotalMix (RME)

Important: Don’t Over-Correct

This is where many people make mistakes.

REW might suggest very aggressive EQ moves, for example:

• -10 dB

• -15 dB

While mathematically correct, this can cause:

• phase issues

• unnatural sound

• overprocessed monitoring

In practice, I recommend:

Use about 60–70% of the suggested correction

Always trust your ears.

REW Room Simulator

In Episode 1 we used the Room Simulator.

This is another powerful feature inside REW.

You can enter:

• room dimensions

• speaker position

• listening position

REW then predicts:

• modal distribution

• frequency response

This helps you understand your room before even placing treatment.

Speaker & Listening Position

REW also helps visualize how positioning affects sound.

When you move:

• speakers

• listening position

You will notice:

• big changes in mid frequencies

• smaller changes in low frequencies

Important insight:

Room modes stay roughly the same

Position mainly affects how you experience them

Waterfall Diagram – Time Matters

One of the most important tools in REW is the waterfall diagram.

This shows not only frequency, but also time behaviour.

Sound is not just amplitude — it exists over time.

In the waterfall plot you can see:

• how long frequencies decay

• which frequencies “ring” in the room

Room modes are not only a frequency problem —

they are also a time problem

Low frequencies can:

• build up

• continue oscillating

• smear your perception of bass

This is why bass traps are essential.

Why REW is Essential

REW gives you something incredibly important:

clarity

Instead of guessing, you can:

• measure your room

• understand problems

• make informed decisions

This is the foundation of professional home studio acoustics.

What Comes Next – Episode 3

In the next episode we will go deeper into:

• microphone placement

• how to properly measure your room

• SPL calibration

• real-world measurement workflow

We will turn theory into practice.

Watch the Episode

https://www.youtube.com/@phable

Key Takeaways

• REW is an essential tool for home studio acoustics

• Always measure speakers inside the room

• Focus on 20–300 Hz for acoustic problems

• Avoid over-correcting with EQ

• Room modes affect both frequency and time

• Use measurements to guide treatment decisions

Frequently Asked Questions

What is REW used for?

REW is used to measure and analyze room acoustics, including frequency response, room modes, and decay behaviour.

Do I need a measurement microphone?

Yes. A calibrated measurement microphone ensures accurate results.

Should I EQ my entire frequency response?

No. Focus mainly on low frequencies (20–300 Hz). Over-correction can harm sound quality.

What is a waterfall diagram?

It is a 3D visualization showing how frequencies decay over time, helping identify ringing and modal issues.

We often focus on synthesizers, compressors, converters or plug-ins, but the physical layout of a studio has a massive influence on creativity and productivity. If your studio is cluttered or poorly organized, you tend to spend less time making music. The workflow becomes frustrating instead of inspiring.

Over the years I realized that studio ergonomics are not a luxury — they are essential.

One of the pieces of equipment that improved my workflow significantly is something that might sound surprisingly simple: a keyboard stand.

More specifically, the K&M Spider Pro.

The Importance of Studio Ergonomics

Many home studios operate in limited spaces. Apartments rarely offer large dedicated studio rooms, so producers need to stack gear vertically and organize equipment intelligently.

Poor ergonomics can create several problems:

• difficult access to synth parameters
• uncomfortable playing positions
• cluttered studio desks
• reduced creative flow

The goal is simple: your instruments should feel immediately accessible and inviting.

If playing or adjusting a synth requires too much effort, chances are you will use it less often.

Why I Chose the K&M Spider Pro

The K&M Spider Pro is a keyboard stand that is widely used both in studios and on live stages.

At first glance it may look minimalistic or even slightly unstable, but in reality it is extremely sturdy and well engineered.

What makes it particularly interesting is its modular design.

The Spider Pro allows you to configure multiple tiers with different types of arms. This means you can adjust the ergonomics depending on the instruments you are using.

Some synthesizers require a flat playing position, while others benefit from an angled setup that improves visibility of displays and controls.

Modular Design and Flexibility

One of the most underrated features of the Spider Pro is the possibility to expand the stand.

You can add:

• additional arms for more synthesizers
• angled arms for better visibility
• accessory plates for laptops, controllers or smaller devices

These accessory plates are especially useful in compact studios where desk space is limited.

Instead of placing controllers or laptops on the main desk, you can position them directly within reach on the stand.

My Current Setup

In my studio I use the Spider Pro to organize some of my favorite synthesizers.

On the upper level I keep my Minimoog, which allows easy access to all controls while standing or sitting.

On the lower tier I placed an Ensoniq ESQ-1, which benefits from the angled arms because the display and parameters are easier to see and adjust.

This layout allows me to quickly switch between instruments without interrupting the creative process.

The stand also offers small details that make a difference, such as integrated cable management, which helps keep the setup tidy.

Studio Workflow Matters

Small improvements in studio organization can have a surprisingly large impact.

When your instruments are positioned correctly and easily accessible, you naturally spend more time experimenting and playing.

The result is simple: better workflow leads to more creativity.

For me, the Spider Pro has become one of those studio essentials that quietly improve the daily experience of making music.

Final Thoughts

Not every studio upgrade needs to be an expensive piece of outboard gear.

Sometimes the most valuable improvements come from optimizing the way you interact with your instruments.

A good keyboard stand might not be the most exciting purchase at first, but it can dramatically improve the ergonomics and usability of your studio.

And ultimately, that’s what really matters: creating an environment where making music feels effortless and inspiring.

If you are interested in more studio gear, workflow tips and production tools, feel free to explore the Studio Essentials series on my YouTube channel.