Summary of "HOW TO: Dirac Live Room Correction - Optimize Your Audio Experience with Our Updated Setup Guide!"
What this video covers
- An updated, step-by-step guide to setting up Dirac Live room correction (including Dirac Live Bass Control) for home-theater receivers and two‑channel preamps.
- Practical tips from Audio Advice’s on-site and remote calibrations, plus recommendations integrated from the Dirac team.
Dirac Live versions & features
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Dirac Live (Limited bandwidth) Corrects distance, gains, impulse response and EQ roughly 20 Hz–500 Hz (the most critical range).
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Dirac Live (Full bandwidth) Same corrections, extended to ~20 Hz–20 kHz.
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Dirac Live Bass Control Time/phase aligns subs to mains, sets crossover and optimizes multi‑sub systems (single or multiple subs). Recommended for stereo setups with 2+ subs and for most theaters.
Pre-measurement setup (hardware & room)
- Configure receiver/processor: speaker types, distances and levels. Dirac can replace these settings, but presetting is helpful.
- Set a maximum master volume (example: ~90%) for safety.
- If subs have their own EQ, run it first; turn sub crossover off if the processor will handle crossover.
- Recommended processor crossover: ~80 Hz for most theaters (adjust lower if you have truly full-range mains and sufficient amp headroom).
- Arrange the room as you normally use it (curtains closed, reclined seating, etc.) and eliminate HVAC/projector noise.
Software & microphone
- Download the latest Dirac Live PC/Mac software and ensure the computer is on the same network as the processor.
- Use an analog input on the processor to avoid click/pink-noise issues that can occur with some HDMI inputs.
- Plug the supplied measurement mic (UMIK/puck) into the computer and load the mic’s calibration file. For a UMIK used upright, load the 90° calibration file.
Volume calibration
- Calibrate at a typical listening level because speaker frequency response varies with level.
- Measure the room noise floor, then set speaker level so the quietest speaker is about 30 dB above the noise floor. Aim for speakers within ~3 dB of each other.
- If a speaker doesn’t play during a test, try another and return to it.
Arrangement & measurement strategy
- Choose an arrangement based on desired imaging:
- Tightly focused imaging — single seat / two‑channel single listening spot.
- Focused imaging — 1–2 key seats (typical theater).
- Wide imaging — multiple rows / wider coverage.
- Place the mic at ear position for the main listening spot (the middle listening position is most important). If you recline while listening, place the mic in the reclined position.
- Measurement count and placement:
- Do 5–7 measurements for one or two seats; do more for wider coverage.
- Vary forward/back/left/right/up/down around ear positions.
- Avoid placing the mic extremely close to walls and don’t put it extremely far from listening positions.
- Common errors:
- Clipping: reduce speaker volume or move the mic away from very near speakers.
- Low SNR: eliminate noise sources or raise measurement volume.
Filter design, target curves & perception
- Dirac automatically groups speakers and suggests a target curve adapted to your system.
- After calibration you may perceive bass as reduced because room peaks are removed and overall SPL may be lowered. You can raise system volume slightly if needed.
- Ways to increase perceived bass:
- Use Dirac’s low-frequency “handle” to boost bass (for example +3–4 dB).
- Load a custom target curve (Audio Advice provides calibrated target curves with varying bass levels). Load via Menu → Load Target Curve → apply to all groups.
- Dirac enforces a maximum filter gain (about 10 dB). Do not exceed speaker capability.
Curtains & frequency limits
- Use the left/right “curtains” to restrict Dirac’s correction frequency range:
- Pull the left curtain right to stop correction below a chosen frequency.
- Pull the right curtain left to stop correction above a chosen frequency.
- Do not expand curtains outward unless you are experienced.
Bass management vs Bass Control
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Bass Management Dirac can override processor crossovers if you did not use dedicated Bass Control hardware.
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Bass Control (preferred) Aligns subs in time/phase and optimizes multiple subs. Dirac calculates a suggested crossover (current default minimum ~70 Hz). Use snapshots and calculations to test different crossover and gain combinations.
Snapshots, exports & workflow
- Create snapshots (name them to include bass gain/crossover) for alternate filters (e.g., tight single-seat vs wide/party filters).
- Export filters to the processor; many devices accept multiple filters.
- Save the Dirac project so you can revisit and tweak later.
Quick practical tips
- Use an analog input on the processor for pink-noise playback.
- Load the mic calibration file before measuring (UMIK 90° if mic is upright).
- Keep speakers within ~3 dB of each other during volume calibration.
- Stay about a foot from walls for measurements when possible.
- Be conservative with filter gains; do not push small subs beyond their capability.
Where to find more
- Audio Advice has additional setup and calibration videos on their YouTube channel and at audioadvice.com.
- The video references Audio Advice’s custom target curves that are included with purchases from them.
Main speakers / sources
- Scott (CEO of Audio Advice) — presenter and author of the guide.
- The Dirac team — consulted for software and best-practice input.
- Example hardware referenced: JBL Synthesis processor and UMIK/puck measurement microphones.
Category
Technology
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