Frequency Response Measurement and Correction
To measure your audio system’s frequency response and create a flat correction EQ:
- Launch the Frequency Response Measurement tool, or select Frequency Response Measurement from the Settings menu.
- Follow the guided setup to configure your measurement microphone and output device.
- Measure your system’s frequency response at one or more listening positions.
- Generate a parametric EQ correction that can be directly imported into EffeTune.
- Apply the correction to achieve a more accurate, neutral sound reproduction.
Output Channels
Set Output Device Channels to match your output device: 6 for 5.1 or 8 for 7.1. Output channel and per-channel bandwidth choices stay within this range. Test signals and measurements always use this channel count, so keep 6 even when measuring only Ch 3 (center) and Ch 4 (subwoofer) on a 5.1 device.
For a multichannel system, select All Channels to measure all outputs together, or select individual Output Channel entries to measure them one at a time. Under Advanced Settings, choose Off, Same for All Channels, or Per Channel for sweep bandwidth. With Per Channel, use Channel to Configure to set each selected output channel’s frequency range. During level adjustment, Channel Mode starts at Automatic Rotation; select a specific test-signal channel or Manual when needed.
Importing an Impulse Response
If you already have an impulse-response WAV file, choose Import and select it. EffeTune saves each WAV channel as a measurement result that can be used in Room EQ and other measurement-based features.
Audio Interface Calibration
To remove your audio interface’s own response, connect its output directly to its input and save that loopback as a normal, uncalibrated measurement with an impulse response. For your speaker measurement, select that saved point under Audio Interface Calibration while keeping the same interface, channels, sample rate, and input/output gain settings. Choose None (uncalibrated) to measure without loopback calibration.
Reading and Exporting Results
Saved measurements that include impulse-response data show a normalized Impulse Response plot opening at 0–10 ms from the detected onset. Use the mouse wheel or buttons to zoom the time axis, and drag the plot or use the slider to scroll. Selecting a measurement point updates the plot; All (Average) displays the first point that has saved impulse-response data and identifies it above the graph. Use Export Impulse Response (WAV) below the plot to save the displayed point’s full, unnormalized response as a mono 32-bit float WAV at the measurement sample rate.
To inspect the active pipeline’s Frequency, Phase, Min Group Delay, Excess Group Delay, and Impulse responses—including up to four selected outputs and optional saved speaker responses—see the Pipeline Analyzer guide.