Room EQ Screen
The Room EQ screen walks you through measuring and correcting your room’s acoustic frequency response. It generates per-channel parametric EQ filters to flatten in-room response from stereo up to 9.1.6 Atmos configurations.
Prerequisites
Section titled “Prerequisites”- Speaker frequency response data (from spinorama.org database or local CSV)
- Optional: a calibrated microphone and room impulse response recordings (see Recording Measurements)
Workflow
Section titled “Workflow”Stage 1: Speaker Data
Section titled “Stage 1: Speaker Data”Choose how to provide speaker measurements:
- Spinorama database — search by manufacturer and model; SotF fetches anechoic data directly from the spinorama.org API
- Local file — import a CSV measurement file
Assign measurements to each channel in your setup (L, R, C, Ls, Rs, etc.).
Stage 2: Room Configuration
Section titled “Stage 2: Room Configuration”Define your speaker layout:
| Setting | Description |
|---|---|
| Channel configuration | Stereo, 5.1, 7.1, 9.1.6, etc. |
| Speaker distance | Distance from each speaker to the listening position (meters) |
| Speaker angle | Horizontal angle of each speaker relative to the listening axis |
| Subwoofer crossover | Crossover frequency if LFE channel is used |
Stage 3: Optimization Parameters
Section titled “Stage 3: Optimization Parameters”| Setting | Description |
|---|---|
| Filters per channel | Number of PEQ bands (5–10 recommended) |
| Target curve | Flat, or a tilted house curve |
| Max boost/cut | Maximum correction per band (±6 dB is conservative) |
| Frequency range | Typically 20 Hz – 16 kHz; narrow for sub-only correction |
| Algorithm | COBYLA (fast) or DE (thorough) |
Stage 4: Optimize
Section titled “Stage 4: Optimize”Press Run. The optimizer calculates PEQ filters for each channel simultaneously. Progress is shown per channel. For multi-channel setups this takes a few seconds to a minute depending on the algorithm and number of filters.
Stage 5: Review Results
Section titled “Stage 5: Review Results”The results screen shows a per-channel before/after frequency response overlay. Each channel has its own tab. Review each one and optionally adjust individual filter bands manually.
Key metrics shown per channel:
- RMS error — average deviation from target (lower is better; < 1 dB is excellent)
- Peak error — worst-case deviation
- Filter list — frequency, Q, and gain for each band
Stage 6: Apply or Export
Section titled “Stage 6: Apply or Export”| Option | Description |
|---|---|
| Apply | Load the filters directly into the plugin chain (one EQ plugin per channel) |
| Export → APO | EqualizerAPO config files, one per channel |
| Export → JSON | SotF preset file for reuse |
| Export → RME | RME TotalMix FX channel EQ format |
- Measure your room — spinorama anechoic data gives a good starting point, but actual in-room measurements (via the Recording screen) produce better results
- Limit bass correction — room modes below 200 Hz are position-dependent; large boosts below 100 Hz can cause driver overload. Prefer cuts over boosts in the bass.
- Check phase alignment — the optimizer accounts for inter-channel timing; verify the channel delay settings match your actual speaker distances