🔧 INSTALLER LEVEL: Dirac Live Measurement Procedure

Measurement Setup

Microphone placement:

Dirac recommends 9 measurement positions around the primary listening position. Positions should be: - Within 18 inches of the ear position - Varied in height and angle (not all at exact ear height) - Include some off-axis positions (±15° from center)

Environment:

• Engine off
• Air conditioning off (reduces measurement noise)
• Windows closed
• No movement inside or outside the vehicle during measurement

Measurement process:

1. Connect UMIK-1 to laptop
2. Open Dirac Live application
3. Enter room/vehicle information
4. Follow measurement wizard: 9 positions, each plays test sweep
5. Dirac processes all measurements (2–5 minutes)
6. Review proposed correction curve
7. Adjust target curve if desired (bass extension, treble tilt)
8. Export filters to DSP

Interpreting and Adjusting the Target Curve

Dirac's default target curve may not match the Harman automotive target. After generating corrections, compare the target to the Harman curve and adjust:

• Increase bass lift below 100 Hz (match Harman's +6 dB)
• Ensure treble rolloff matches Harman's gentle shelving above 10 kHz
• Do not apply severe boosts anywhere — Dirac will simply increase power demand at those frequencies