ディラック・ライブ・ルーム補正スイート

Why does the volume decrease significantly when applying the finished filter?
The sound being quieter when Dirac Live is turned on compared to off is caused by a misalignment of the speaker levels (especially subwoofer) prior to measurement. To improve that you may need to redo your calibration with the following adjustments:

Make sure to perform the calibration with a volume at your typical listening level, or slightly higher.

Make sure that all speakers have about the same gain before calibration.

If a speaker has lower sensitivity (plays softer than other speakers at the same volume setting), you should first try to increase its trim level directly on the speaker, on its amplifier, or on the Dirac Live-enabled device.

If positive trims aren’t available, try reducing the other speakers' trim levels to align them with the less sensitive speaker(s), either directly on the speaker, on the amplifier that they are connected to, or on your Dirac Live-enabled device.

Make sure that the subwoofers are measured ~3-6 dB higher than the main speakers (use the analog gain of the subwoofer to adjust that). You can monitor it in the Measurement Levels window when playing the test tone.

Note: Adjusting the per-speaker sliders in Measurement Levels in Dirac Live will not improve the Dirac on vs off level difference – it will only impact the quality of the measurements by ensuring that the sweeps are played louder than the surrounding noise.

Note: When using Dirac Live Processor, the individual filter levels can be boosted up to +10 dBs under Menu → Advanced Settings…