Tell it about your system
Pick your front stage, rears, and subs, then choose your DSP. That is the whole setup. No signal-flow diagrams, no jargon. Flat Liner Tuning works out the crossover points and channel layout from there.
REW, made simple
Stop fighting REW. Start tuning smarter.
Flat Liner Tuning automates Room EQ Wizard so you can measure, adjust, and verify your DSP in minutes, not hours.
Windows and macOS · Works with the REW you already have
The honest truth
REW is powerful, but painfully complicated.
Room EQ Wizard is the best measurement tool there is. It is also a wall of menus, and it assumes you already know exactly what to do with every graph it draws. Most people spend their first evening with it just trying to get a single clean sweep.
Tuning the hard way
An evening of guesswork
- A dozen setup screens before your first measurement
- Sound card, mic calibration, and levels to sort out by hand
- Graphs that show a problem but never say what to change
- Filters typed into your DSP one number at a time
- Start over from scratch on the next vehicle
⏱ Hours per tune
Tuning with Flat Liner
A guided walkthrough
- Describe your system once, in plain language
- Scans run themselves. REW is driven for you
- Clear next step on every screen
- EQ, levels, and delays calculated automatically
- Save the setup and reuse it on the next car
⏱ Minutes per tune
How it works
Measure. Adjust. Verify. Done.
Flat Liner Tuning controls REW for you. One‑click workflows replace dozens of manual steps, so you get pro‑level results without ever needing to master REW yourself.
Let it measure
Put the mic in place and press go. Flat Liner Tuning runs the sweeps through REW channel by channel and pulls every measurement back in automatically. No exporting, importing, or file juggling.
Get your EQ, levels, and delays
Choose a target curve and Flat Liner Tuning does the math: filters to hit that target, matched levels across channels, and time alignment from your seat. You see the measured, target, and predicted curves side by side before anything is applied.
Verify, then save the report
A final sweep confirms the tune actually landed where it should. You end up with a clean report you can keep for your own records, or hand straight to a customer.
Who it's for
Whether you tune one car or fifty.
Everyone hits the same wall with REW. Flat Liner Tuning gets you past it, whichever side of the hobby you are on.
Car audio enthusiasts
Get a genuinely competition-grade tune in your own driveway. You bring the ears and the system. Flat Liner Tuning handles the measurement science, so a weekend project stops being a weekend-long project.
Shop owners
Repeatable results in every bay, whoever is holding the mic. Save a setup per vehicle, cut tuning time down to a fraction, and hand every customer a printed report that shows exactly what you did.
Home audio listeners
REW-level precision for a living room or studio without the learning curve. Measure your space, let Flat Liner Tuning build the correction, and hear what your speakers were always capable of.
Get started
Ready to tune smarter?
Stop losing evenings to menus and graphs. Let Flat Liner Tuning drive REW, and spend your time listening instead.
Available for Windows and macOS. See the installers
