# RoomEQLab > Free, brand-neutral, step-by-step room correction guides for Dirac Live (Room Correction, Bass Control and ART), Audyssey, Yamaha YPAO, Anthem ARC, Lyngdorf RoomPerfect and Sonos Trueplay, plus how to measure and read results in REW and practical room treatment advice. Every answer links to the manufacturer or official source it is based on. ## Pages - [REW Troubleshooting](https://roomeqlab.com/guides/measure-with-rew/rew-troubleshooting/): Fixes for Room EQ Wizard problems: UMIK not listed, silence on Mac, clipping, SPL not calibrated, HDMI channels, timing reference... - [Sonos Trueplay Troubleshooting](https://roomeqlab.com/guides/sonos-trueplay/trueplay-troubleshooting/): Why Trueplay is missing on Android, some iPads or speakers, how to run it properly, and what to do if... - [RoomPerfect Troubleshooting](https://roomeqlab.com/guides/lyngdorf-roomperfect/roomperfect-troubleshooting/): Fixes for RoomPerfect faults (no microphone, no signal, clipping, low signal), Room Knowledge, Focus and Global filters and subwoofer setup. - [Anthem ARC Troubleshooting](https://roomeqlab.com/guides/anthem-arc/arc-troubleshooting/): Fixes for Anthem ARC Genesis: device or microphone not found, Critical Audio Error, no sweeps, subwoofer level failures and thin... - [YPAO Troubleshooting](https://roomeqlab.com/guides/yamaha-ypao/ypao-troubleshooting/): What Yamaha YPAO errors E-1 to E-10 and warnings W-1 to W-3 mean and how to fix them, plus multipoint... - [Audyssey Troubleshooting](https://roomeqlab.com/guides/audyssey/audyssey-troubleshooting/): Fixes for Audyssey MultEQ errors on Denon and Marantz: no speakers found, ambient noise too high, phase warnings, subwoofer level... - [Troubleshooting](https://roomeqlab.com/troubleshooting/): Fixes for the most common room correction problems: Dirac Live, Audyssey, YPAO, Anthem ARC, RoomPerfect, Sonos Trueplay and REW, from... - [Share Your REW Results](https://roomeqlab.com/guides/measure-with-rew/share-your-rew-results/): Save . mdat files, capture graph images and export text or WAV from Room EQ Wizard, and what to include... - [Is My Result Good?](https://roomeqlab.com/guides/measure-with-rew/is-my-result-good/): Numbers to judge your REW measurements against: frequency response, bass decay, RT60, early reflections, group delay and distortion, with sources. - [Dirac Live FAQ](https://roomeqlab.com/guides/dirac-live/dirac-live-faq/): Straight answers to the most asked Dirac Live questions: licence transfers, trials, support, ART compatibility, stereo, microphones and re-measuring. - [Multiple Subwoofers with Dirac](https://roomeqlab.com/guides/dirac-live/multiple-subwoofers-with-dirac/): How to wire, place, level and group two or more subwoofers for Dirac Live Room Correction, Bass Control and ART. - [Reading Your Dirac Graphs](https://roomeqlab.com/guides/dirac-live/reading-your-dirac-graphs/): What the Dirac Live measurement, Filter Design and spread graphs show, what a good result looks like, and why some... - [Trueplay Step 3: Check and Adjust](https://roomeqlab.com/guides/sonos-trueplay/step-3-check-and-adjust/): Compare Trueplay on and off, adjust bass, treble and loudness, and when to retune your Sonos speakers. - [Trueplay Step 2: Run Trueplay](https://roomeqlab.com/guides/sonos-trueplay/step-2-run-trueplay/): Step-by-step Trueplay tuning in the Sonos app, how to walk the room and tuning a home cinema set with sub... - [Trueplay Step 1: Get Ready](https://roomeqlab.com/guides/sonos-trueplay/step-1-get-ready/): Advanced tuning with an iPhone or Quick tuning with the speaker's own mics: which Sonos products and phones support each. - [Anthem ARC Step 4: Check and Fine-Tune](https://roomeqlab.com/guides/anthem-arc/step-4-check-and-tune/): Why bass sounds lighter after ARC and how to adjust Room Gain, Deep Bass, Tilt, Max EQ frequency and crossovers. - [Anthem ARC Step 3: Measure and Upload](https://roomeqlab.com/guides/anthem-arc/step-3-run-arc/): Measure each position in ARC Genesis, check the graphs, upload the correction and save your project, plus mic detection fixes. - [Anthem ARC Step 2: Place the Microphone](https://roomeqlab.com/guides/anthem-arc/step-2-mic-placement/): The five mic positions Anthem ARC Genesis uses, where each one goes and how to cover a wider seating area. - [Anthem ARC Step 1: Get Ready](https://roomeqlab.com/guides/anthem-arc/step-1-get-ready/): Install ARC Genesis, connect your computer and set subwoofer levels with Quick Measure so the measurement doesn't fail. - [RoomPerfect Step 4: Choose Your Filter and Voicing](https://roomeqlab.com/guides/lyngdorf-roomperfect/step-4-choose-filters/): When to use the RoomPerfect Focus or Global filter, how voicings work, and bass management on MP processors. - [RoomPerfect Step 3: Measure the Room Positions](https://roomeqlab.com/guides/lyngdorf-roomperfect/step-3-room-positions/): Where to put the mic for RoomPerfect room positions and why you should stop at about 90 to 95% Room... - [RoomPerfect Step 2: Measure the Focus Position](https://roomeqlab.com/guides/lyngdorf-roomperfect/step-2-focus-position/): How to measure the RoomPerfect Focus position at your main seat, and storing more than one Focus position. - [RoomPerfect Step 1: Get Ready](https://roomeqlab.com/guides/lyngdorf-roomperfect/step-1-get-ready/): Prepare to run Lyngdorf RoomPerfect and learn how it separates the speaker from the room. - [YPAO Step 4: Check and Fine-Tune](https://roomeqlab.com/guides/yamaha-ypao/step-4-check-and-tune/): Natural, Flat, Front or Through: which YPAO EQ type to use, plus YPAO Volume, crossovers and subwoofer level. - [YPAO Step 3: Run YPAO](https://roomeqlab.com/guides/yamaha-ypao/step-3-run-ypao/): The YPAO menu steps, the AV Setup Guide app, what YPAO sets and when to run it again. - [YPAO Step 2: Place the Microphone](https://roomeqlab.com/guides/yamaha-ypao/step-2-mic-placement/): Where the YPAO microphone goes, how far apart the multi-point positions should be and an 8-position pattern to follow. - [YPAO Step 1: Get Ready](https://roomeqlab.com/guides/yamaha-ypao/step-1-get-ready/): Prepare to run YPAO on a Yamaha receiver: speaker setup, subwoofer settings, a quiet room and the R. S. C.... - [Audyssey Step 4: Check and Fine-Tune](https://roomeqlab.com/guides/audyssey/step-4-check-and-tune/): Crossovers, levels, Dynamic EQ reference level offset and Reference vs Flat, plus the MultEQ Editor app and MultEQ-X. - [Audyssey Step 3: Run Audyssey](https://roomeqlab.com/guides/audyssey/step-3-run-audyssey/): The Audyssey Setup menu steps on current Denon and Marantz receivers, what the warnings mean and when to run it... - [Audyssey Step 2: Place the Microphone](https://roomeqlab.com/guides/audyssey/step-2-mic-placement/): Where the Audyssey microphone goes: position 1 at the main seat, spacing for the other positions, height and what to... - [Audyssey Step 1: Get Ready](https://roomeqlab.com/guides/audyssey/step-1-get-ready/): Prepare for Audyssey on Denon and Marantz: speaker setup, subwoofer settings, a quiet room, and the MultEQ, XT and XT32... - [Dirac ART Deep Dive: Grouping, Support and Tuning](https://roomeqlab.com/guides/dirac-live/art-deep-dive/): Advanced Dirac ART tuning: grouping, who supports whom, support levels, curtains, an example 7. 2. 4 matrix and reading the... - [Dirac ART Filters Used Counter Explained](https://roomeqlab.com/guides/dirac-live/art-filters-used-counter/): What the ART filters used counter in Dirac Live means, why it varies between systems and what to do near... - [Dirac ART Infra Bass Tick Box Explained](https://roomeqlab.com/guides/dirac-live/art-infra-bass-tick-box/): What the Infra bass tick box in Dirac ART does, why it appears next to some speakers and which groups... - [Room Correction, Bass Management, Bass Control and ART Explained](https://roomeqlab.com/guides/dirac-live/room-correction-bass-management-bass-control-art/): The difference between Dirac Live Room Correction, Bass Management, Bass Control and Active Room Treatment, and who benefits from each. - [Dirac Live Step 8: Export, Save and Check](https://roomeqlab.com/guides/dirac-live/step-8-export-check/): Export your Dirac Live filter to a slot, save the project and check the result by ear and with measurements. - [Dirac Live Step 7: Design Filters and Apply a Target Curve](https://roomeqlab.com/guides/dirac-live/step-7-filter-design/): Group speakers, set the curtains and apply a target curve in Dirac Live's Filter Design, and how far to push... - [Dirac Live Step 6: Take the Measurements](https://roomeqlab.com/guides/dirac-live/step-6-measurements/): Run the Dirac Live sweeps at every position, handle imprecise measurement warnings, then choose Room Correction, Bass Control or ART. - [Dirac Live Step 5: Choose Your Mic Arrangement](https://roomeqlab.com/guides/dirac-live/step-5-mic-arrangement/): Which Dirac Live arrangement to choose, where the mic goes, spacing between positions and proven measurement patterns. - [REW Before and After Checks](https://roomeqlab.com/guides/measure-with-rew/before-and-after-checks/): Measure with and without room correction in REW to see what your calibration really changed at your seat. - [Reading REW Graphs](https://roomeqlab.com/guides/measure-with-rew/reading-rew-graphs/): How to read REW's frequency response, waterfall, spectrogram and RT60 graphs, and what peaks, dips and ringing mean. - [Your First REW Sweep](https://roomeqlab.com/guides/measure-with-rew/your-first-sweep/): Set levels and take your first frequency response measurement in Room EQ Wizard, step by step. - [REW Microphone Calibration](https://roomeqlab.com/guides/measure-with-rew/microphone-calibration/): How to load your measurement mic's calibration file into REW, and whether to use the 0 or 90 degree file. - [REW Measurement Kit](https://roomeqlab.com/guides/measure-with-rew/measurement-kit/): The measurement mic and kit you need for REW, how to connect it to your AV receiver, and which REW... - [Room Treatment: Where to Put It](https://roomeqlab.com/guides/room-treatment/treatment-placement/): Where to place absorption, bass traps and diffusion: first reflection points, corners and the wall behind you. - [Room Treatment: Diffusion](https://roomeqlab.com/guides/room-treatment/diffusion/): What acoustic diffusers do, when to use them instead of absorption and where they work best. - [Room Treatment: Bass Traps](https://roomeqlab.com/guides/room-treatment/bass-traps/): What bass traps do, porous and pressure types, and where to place them in a home cinema or listening room. - [Room Treatment: Absorption](https://roomeqlab.com/guides/room-treatment/absorption/): How acoustic absorption works, why thickness and air gaps matter most, and where it helps. - [Applying a Target Curve in Dirac Live](https://roomeqlab.com/resources/target-curves/applying-target-curve-dirac-live/): How to load a target curve file in Dirac Live and apply it to your speaker groups. - [Target Curve Downloads](https://roomeqlab.com/resources/target-curves/target-curve-downloads/): Free Dirac Live target curve files: Harman, Audio Advice, StormAudio cinema, NAD and flat, with graphs of each. - [Target Curves Compared](https://roomeqlab.com/resources/target-curves/target-curves-compared/): Popular room correction target curves compared side by side with graphs: flat, Harman and others. - [What Is a Target Curve?](https://roomeqlab.com/resources/target-curves/what-is-a-target-curve/): Why room correction needs a target curve, and why a flat in-room response usually sounds thin. - [Dirac Live Troubleshooting](https://roomeqlab.com/guides/dirac-live/dirac-live-troubleshooting/): Fixes for imprecise measurements, connection failures, missing licences, low volume and other common Dirac Live problems. - [Dirac Live Active Room Treatment (ART) Setup](https://roomeqlab.com/guides/dirac-live/art-setup/): Set up Dirac Live Active Room Treatment on Denon, Marantz and other processors: licences, groups, support settings and what gets... - [Dirac Live Bass Control Setup](https://roomeqlab.com/guides/dirac-live/bass-control-setup/): Set up Dirac Live Bass Control: subwoofer preparation, crossovers, why bass sounds lighter and how to fix it, plus an... - [Dirac Live Step 4: Set Your Measurement Levels](https://roomeqlab.com/guides/dirac-live/step-4-levels/): How to set mic gain, output level, and speaker and subwoofer levels in Dirac Live before you measure. - [Dirac Live Step 3: Install Dirac Live and Connect](https://roomeqlab.com/guides/dirac-live/step-3-install-connect/): Download the Dirac Live app, log in and connect your computer or phone to your receiver, with fixes for common... - [Dirac Live Step 2: Choose Your Microphone](https://roomeqlab.com/guides/dirac-live/step-2-microphone/): Which USB measurement mic works with Dirac Live, why the Audyssey mic won't, and how to set it up with... - [Dirac Live Step 1: Choose and Buy Your Licence](https://roomeqlab.com/guides/dirac-live/step-1-licence/): Which Dirac Live licence you need, Limited or Full Bandwidth, Bass Control and ART, and how to get it onto... - [How Dirac Live Works](https://roomeqlab.com/guides/dirac-live/how-dirac-live-works/): How Dirac Live corrects timing as well as frequency response, why it measures a listening area and what it can't... - [How Room Correction Works](https://roomeqlab.com/start-here/how-room-correction-works/): What room correction measures, what it can fix and what it can't, and how Dirac Live, Audyssey, YPAO and ARC... - [Which System Do I Have?](https://roomeqlab.com/start-here/which-system-do-i-have/): Find out whether your receiver uses Dirac Live, Audyssey, YPAO, Anthem ARC, RoomPerfect or Trueplay, then follow the right guide. - [Advertising Policy](https://roomeqlab.com/affiliate-disclosure/): Last updated: 29 September 2026 RoomEQLab is free to use and completely non-commercial. There are no adverts, no affiliate links... - [Cookie Policy](https://roomeqlab.com/cookie-policy/): The cookies RoomEQLab uses and how to control them. - [Privacy Policy](https://roomeqlab.com/privacy-policy/): How RoomEQLab collects and uses personal information, and your rights under UK data protection law. - [About](https://roomeqlab.com/about/): RoomEQLab is run by Derek Anderson, a home cinema and hi-fi enthusiast based in Scotland. Why I built it Room... - [Target Curves](https://roomeqlab.com/resources/target-curves/): What a target curve is, the popular curves compared and free target curve files to load into Dirac Live. - [Measure with REW](https://roomeqlab.com/guides/measure-with-rew/): Free guides to Room EQ Wizard: the kit you need, mic calibration, your first sweep, reading graphs and before and... - [Room Treatment](https://roomeqlab.com/guides/room-treatment/): What room treatment fixes that room correction can't: absorption, bass traps, diffusion and where to put them. - [Sonos Trueplay](https://roomeqlab.com/guides/sonos-trueplay/): A free guided Trueplay walkthrough for Sonos soundbars and speakers: which tuning you can use, running it and checking the... - [Yamaha YPAO](https://roomeqlab.com/guides/yamaha-ypao/): A free guided YPAO walkthrough for Yamaha receivers: preparation, mic positions, running YPAO, EQ types and YPAO Volume. - [Anthem ARC](https://roomeqlab.com/guides/anthem-arc/): A free guided Anthem ARC Genesis walkthrough: software, subwoofer levels, mic positions, measuring, uploading and adjusting targets. - [Lyngdorf RoomPerfect](https://roomeqlab.com/guides/lyngdorf-roomperfect/): A free guided RoomPerfect walkthrough: Focus position, random room positions, Room Knowledge, Focus vs Global filters and voicings. - [Audyssey](https://roomeqlab.com/guides/audyssey/): A free guided Audyssey MultEQ walkthrough for Denon and Marantz: preparation, mic placement, running it and the settings to check. - [Dirac Live](https://roomeqlab.com/guides/dirac-live/): A free guided Dirac Live walkthrough: licence, mic, levels, measurements, filter design, Bass Control, ART and export, with advanced deep... - [Start Here](https://roomeqlab.com/start-here/): New to room correction? A free guided path from understanding what it does to calibrating your system and checking the... - [Resources](https://roomeqlab.com/resources/): Target curves with free downloads, a glossary of room correction terms and answers to common questions. - [FAQ](https://roomeqlab.com/faq/): Short answers to common room correction questions: mic placement, number of positions, weak bass after calibration, crossovers and more. - [Gear](https://roomeqlab.com/gear/): What you need depends on your system. Audyssey, YPAO, Anthem ARC, RoomPerfect and Trueplay use the microphone or phone that... - [Glossary](https://roomeqlab.com/glossary/): Plain-English definitions of room correction terms: target curve, crossover, room mode, bass management, ART, Fsiso and more. - [Guides](https://roomeqlab.com/guides/): Guided walkthroughs for Dirac Live, Audyssey, YPAO, Anthem ARC, Lyngdorf RoomPerfect and Sonos Trueplay, plus REW and room treatment. - [Home](https://roomeqlab.com/): Free, step-by-step guides to room correction: Dirac Live, Audyssey, YPAO, Anthem ARC, RoomPerfect and Sonos Trueplay. Beginner and advanced paths. ## Posts # # Detailed Content ## Pages Fixes for Room EQ Wizard problems: UMIK not listed, silence on Mac, clipping, SPL not calibrated, HDMI channels, timing reference and noisy results. Why Trueplay is missing on Android, some iPads or speakers, how to run it properly, and what to do if it sounds worse afterwards. Fixes for RoomPerfect faults (no microphone, no signal, clipping, low signal), Room Knowledge, Focus and Global filters and subwoofer setup. Fixes for Anthem ARC Genesis: device or microphone not found, Critical Audio Error, no sweeps, subwoofer level failures and thin or bright results. What Yamaha YPAO errors E-1 to E-10 and warnings W-1 to W-3 mean and how to fix them, plus multipoint measuring, results and YPAO Volume. Fixes for Audyssey MultEQ errors on Denon and Marantz: no speakers found, ambient noise too high, phase warnings, subwoofer level and the MultEQ Editor app. Fixes for the most common room correction problems: Dirac Live, Audyssey, YPAO, Anthem ARC, RoomPerfect, Sonos Trueplay and REW, from official sources. Save .mdat files, capture graph images and export text or WAV from Room EQ Wizard, and what to include when asking others to review your results. Numbers to judge your REW measurements against: frequency response, bass decay, RT60, early reflections, group delay and distortion, with sources. Straight answers to the most asked Dirac Live questions: licence transfers, trials, support, ART compatibility, stereo, microphones and re-measuring. How to wire, place, level and group two or more subwoofers for Dirac Live Room Correction, Bass Control and ART. What the Dirac Live measurement, Filter Design and spread graphs show, what a good result looks like, and why some dips can't be fixed. Compare Trueplay on and off, adjust bass, treble and loudness, and when to retune your Sonos speakers. Step-by-step Trueplay tuning in the Sonos app, how to walk the room and tuning a home cinema set with sub and surrounds. Advanced tuning with an iPhone or Quick tuning with the speaker's own mics: which Sonos products and phones support each. Why bass sounds lighter after ARC and how to adjust Room Gain, Deep Bass, Tilt, Max EQ frequency and crossovers. Measure each position in ARC Genesis, check the graphs, upload the correction and save your project, plus mic detection fixes. The five mic positions Anthem ARC Genesis uses, where each one goes and how to cover a wider seating area. Install ARC Genesis, connect your computer and set subwoofer levels with Quick Measure so the measurement doesn't fail. When to use the RoomPerfect Focus or Global filter, how voicings work, and bass management on MP processors. Where to put the mic for RoomPerfect room positions and why you should stop at about 90 to 95% Room Knowledge. How to measure the RoomPerfect Focus position at your main seat, and storing more than one Focus position. Prepare to run Lyngdorf RoomPerfect and learn how it separates the speaker from the room. Natural, Flat, Front or Through: which YPAO EQ type to use, plus YPAO Volume, crossovers and subwoofer level. The YPAO menu steps, the AV Setup Guide app, what YPAO sets and when to run it again. Where the YPAO microphone goes, how far apart the multi-point positions should be and an 8-position pattern to follow. Prepare to run YPAO on a Yamaha receiver: speaker setup, subwoofer settings, a quiet room and the R.S.C., multi-point and 3D versions. Crossovers, levels, Dynamic EQ reference level offset and Reference vs Flat, plus the MultEQ Editor app and MultEQ-X. The Audyssey Setup menu steps on current Denon and Marantz receivers, what the warnings mean and when to run it again. Where the Audyssey microphone goes: position 1 at the main seat, spacing for the other positions, height and what to stand it on. Prepare for Audyssey on Denon and Marantz: speaker setup, subwoofer settings, a quiet room, and the MultEQ, XT and XT32 versions. Advanced Dirac ART tuning: grouping, who supports whom, support levels, curtains, an example 7.2.4 matrix and reading the spread graph. What the ART filters used counter in Dirac Live means, why it varies between systems and what to do near the limit. What the Infra bass tick box in Dirac ART does, why it appears next to some speakers and which groups to tick. The difference between Dirac Live Room Correction, Bass Management, Bass Control and Active Room Treatment, and who benefits from each. Export your Dirac Live filter to a slot, save the project and check the result by ear and with measurements. Group speakers, set the curtains and apply a target curve in Dirac Live's Filter Design, and how far to push the target. Run the Dirac Live sweeps at every position, handle imprecise measurement warnings, then choose Room Correction, Bass Control or ART. Which Dirac Live arrangement to choose, where the mic goes, spacing between positions and proven measurement patterns. Measure with and without room correction in REW to see what your calibration really changed at your seat. How to read REW's frequency response, waterfall, spectrogram and RT60 graphs, and what peaks, dips and ringing mean. Set levels and take your first frequency response measurement in Room EQ Wizard, step by step. How to load your measurement mic's calibration file into REW, and whether to use the 0 or 90 degree file. The measurement mic and kit you need for REW, how to connect it to your AV receiver, and which REW version to use. Where to place absorption, bass traps and diffusion: first reflection points, corners and the wall behind you. What acoustic diffusers do, when to use them instead of absorption and where they work best. What bass traps do, porous and pressure types, and where to place them in a home cinema or listening room. How acoustic absorption works, why thickness and air gaps matter most, and where it helps. How to load a target curve file in Dirac Live and apply it to your speaker groups. Free Dirac Live target curve files: Harman, Audio Advice, StormAudio cinema, NAD and flat, with graphs of each. Popular room correction target curves compared side by side with graphs: flat, Harman and others. Why room correction needs a target curve, and why a flat in-room response usually sounds thin. Fixes for imprecise measurements, connection failures, missing licences, low volume and other common Dirac Live problems. Set up Dirac Live Active Room Treatment on Denon, Marantz and other processors: licences, groups, support settings and what gets locked. Set up Dirac Live Bass Control: subwoofer preparation, crossovers, why bass sounds lighter and how to fix it, plus an in-depth section. How to set mic gain, output level, and speaker and subwoofer levels in Dirac Live before you measure. Download the Dirac Live app, log in and connect your computer or phone to your receiver, with fixes for common connection problems. Which USB measurement mic works with Dirac Live, why the Audyssey mic won't, and how to set it up with its calibration file. Which Dirac Live licence you need, Limited or Full Bandwidth, Bass Control and ART, and how to get it onto your receiver. How Dirac Live corrects timing as well as frequency response, why it measures a listening area and what it can't correct. What room correction measures, what it can fix and what it can't, and how Dirac Live, Audyssey, YPAO and ARC differ. Find out whether your receiver uses Dirac Live, Audyssey, YPAO, Anthem ARC, RoomPerfect or Trueplay, then follow the right guide. The cookies RoomEQLab uses and how to control them. How RoomEQLab collects and uses personal information, and your rights under UK data protection law. What a target curve is, the popular curves compared and free target curve files to load into Dirac Live. Free guides to Room EQ Wizard: the kit you need, mic calibration, your first sweep, reading graphs and before and after checks. What room treatment fixes that room correction can't: absorption, bass traps, diffusion and where to put them. A free guided Trueplay walkthrough for Sonos soundbars and speakers: which tuning you can use, running it and checking the result. A free guided YPAO walkthrough for Yamaha receivers: preparation, mic positions, running YPAO, EQ types and YPAO Volume. A free guided Anthem ARC Genesis walkthrough: software, subwoofer levels, mic positions, measuring, uploading and adjusting targets. A free guided RoomPerfect walkthrough: Focus position, random room positions, Room Knowledge, Focus vs Global filters and voicings. A free guided Audyssey MultEQ walkthrough for Denon and Marantz: preparation, mic placement, running it and the settings to check. A free guided Dirac Live walkthrough: licence, mic, levels, measurements, filter design, Bass Control, ART and export, with advanced deep dives. New to room correction? A free guided path from understanding what it does to calibrating your system and checking the result. Target curves with free downloads, a glossary of room correction terms and answers to common questions. Short answers to common room correction questions: mic placement, number of positions, weak bass after calibration, crossovers and more. Plain-English definitions of room correction terms: target curve, crossover, room mode, bass management, ART, Fsiso and more. Guided walkthroughs for Dirac Live, Audyssey, YPAO, Anthem ARC, Lyngdorf RoomPerfect and Sonos Trueplay, plus REW and room treatment. Free, step-by-step guides to room correction: Dirac Live, Audyssey, YPAO, Anthem ARC, RoomPerfect and Sonos Trueplay. Beginner and advanced paths. ## Posts