Room Correction Guide: HouseCurve, Dirac Live & REW
Improve any listening space in minutes with HouseCurve, WiiM Auto EQ, Dirac Live ART, Audyssey, ARC Genesis & more, no acoustic math required.
Matt · · 4 min read
Intro: Why Fixing the Room Still Beats Upgrading Gear
Even the best speakers can’t outrun bad acoustics. Bare floors, hard furniture and off‑axis reflections create peaks, nulls and smearing that no amplifier upgrade will cure. The good news? Modern DSP software can flatten bass modes, dial in phase alignment and apply a gentle “house curve,” all without stacks of fiberglass panels, or an engineering degree. This guide walks you through the easiest, most affordable paths to better sound, from phone‑only apps to the cutting‑edge Dirac Live Active Room Treatment (ART) rolling out later this year. (dirac.com)
TL;DR, If you can run a sweep tone from your phone, you can tune your room.
1. The Smartphone Fast‑Track
HouseCurve (iOS)
All‑in‑one workflow. Launch HouseCurve, play its sweeping sine through AirPlay or Bluetooth and walk the mic around 5-9 seating positions. The app averages the captures, then auto‑generates either parametric EQ (PEQ) values or up to 65‑tap FIR filters compatible with Roon, miniDSP and CamillaDSP. (apps.apple.com, housecurve.com)
Surprisingly accurate mics. Recent iPhone models measure ±1 dB from 20 Hz-16 kHz; plug in a $79 UMIK‑1 if you need full‑range precision. (apps.apple.com)
Perfect WiiM partner. HouseCurve’s PEQ table drops directly into the four‑band filter slots inside the WiiM Home app (see §1.2). For a full walkthrough of measuring, filter export, and what Android users can do, see the HouseCurve app guide.
Pro tip, Enable HouseCurve’s “Target Tilt” for a gentle -1 dB/octave downward slope; listeners tend to prefer a slight bass lift over ruler‑flat.
WiiM Auto Room EQ
One‑tap sweep (iOS only, Android in late‑beta) measures with your phone mic, then uploads a PEQ profile to the WiiM streamer or amp (my long‑term take on the hardware is in the WiiM Ultra review). (forum.wiimhome.com)
Reality check. Limited to four filters and 48 kHz processing, but you’ll hear cleaner male vocals and tighter kick‑drum thump.
When the Phone Isn’t Enough
If you want deeper bass control, stereo/AVRs from Denon, Marantz, Anthem and others unlock more taps, phase linearisation and multi‑sub optimization, jump to §2 and §3.
2. Dirac Live ART: Next‑Gen, Whole‑Room Control
Feature
Dirac Live Bass Control
Dirac Live ART (New)
Correction Range
20-500 Hz
20 Hz-room’s Schröder freq
Processing
Per‑speaker
MIMO phased array
Mic Positions
9
17 (recommended)
Cost
$349 licence
$259 add‑on (H2 2025 rollout)
Dirac’s Active Room Treatment treats your entire speaker set as a coherent array. Instead of simply flattening each channel, ART manipulates inter‑speaker phase to cancel room modes and reduce decay time by up to 10 dB below 500 Hz. Early beta testers report “sub‑like” weight from stand‑mount monitors and faster bass decay times (≤300 ms) even in untreated living rooms. (dirac.com, audioxpress.com, dirac.com)
Availability, Denon & Marantz models that already support Dirac Live Bass Control should gain ART via firmware in H2 2025. Expect similar licencing for NAD and StormAudio soon after.
Setup at a Glance
USB mic (UMIK‑1 or Dirac Live‑certified) at 17 positions in a 2 × 2 m volume.
Target curve selection (start with Dirac’s “Recommended”). Adjust bass shelf after first listen.
Export to AVR; run Bass Control first if you use multiple subs.
CPU overhead? A single SHARC core at 96 kHz; most 2023‑era AVRs qualify.
3. Proven Mid‑Tier Alternatives
Audyssey MultEQ‑X (Windows, $199)
A pro‑grade PC app that unlocks unlimited filter taps, per‑channel target curves and phase editing on Denon/Marantz gear. Perfect if you want granular control but can’t justify Dirac’s licence. (audyssey.com, audyssey.com)
Anthem ARC Genesis (Win/Mac, Free)
Owners of Anthem, MartinLogan and Paradigm products get a surprisingly deep toolset, incl. per‑speaker max‑correction frequency and automatic phase alignment. Latest 1.6.x build refines phase correction for <80 Hz crossovers. (anthemarc.com, anthemarc.com)
REW + miniDSP
Zero‑cost Room EQ Wizard plus a $125-$300 miniDSP 2×4 HD or Flex opens true 64‑bit FIR convolution, dual‑sub integration and automatic delay calibration. Plan on 30 minutes of learning curve, but unmatched flexibility if you switch speakers often. Torn between the free and paid routes? I compare them head to head in REW vs Dirac Live.
4. Which Path Fits You?
“I just want a quick fix.” → WiiM Auto EQ (10 min).
“I’m comfy with apps, run a 2‑channel rig.” → HouseCurve → PEQ or FIR export (20 min).
“I own a modern AVR & want ‘wow’ bass.” → Dirac Live ART licence (45 min).
“I like to tweak graphs.” → Audyssey MultEQ‑X or ARC Genesis (40 min).
“I’m a DIY nerd.” → REW + miniDSP/CamillaDSP (as long as it takes!).
Remember: Digital correction is most effective after basic treatments, think rugs, curtains and bookshelves that break up early reflections.
5. Expert Implementation Tips
Use 5-7 mic positions for stereo, 9-17 for surround. Averaging avoids over‑fitting.
Target Curve, Aim for -1 dB/octave decline above 1 kHz or adopt Harman’s +4 dB bass shelf for a warmer balance.
Check decay time (RT60). Anything above 400 ms below 250 Hz will still sound boomy, add a bass trap or sofa before chasing more EQ.
Level‑match subs & tops to within 1 dB before correction; software can’t fix gain structure.
Frequently asked questions
Does Dirac Live ART replace acoustic panels?
No. Active Room Treatment reduces modal ringing in the bass, but it can't tame flutter echoes or first-reflection comb filtering above roughly 500 Hz. Treat DSP as a complement to physical treatment: pair it with at least minimal absorption like rugs, curtains, and bookshelves that break up early reflections.
Can HouseCurve export room correction directly to Roon?
Yes. Save HouseCurve's FIR filter as a WAV file, then load it in Roon under DSP and Convolution, which supports 48, 96, and 192 kHz files. HouseCurve also documents export paths for miniDSP, Volumio, and Crestron, and its PEQ values can be typed into apps like the WiiM Home app.
Is WiiM room correction available on Android?
Yes. WiiM's onboard Auto Room EQ is now available in the WiiM Home app on both iOS and Android, so Android users can run a sweep with the phone mic and apply a correction profile without a separate app. It stays limited to four filters and 48 kHz processing.
Do I need a calibrated mic for room correction?
For casual tuning, no. Modern iPhone mics measure within about 1 dB up to 16 kHz, enough to find and fix the big problems. For formal, full-range work, a calibrated USB mic like the $79 miniDSP UMIK-1 gives lab-grade accuracy across the whole spectrum.
