Metering
Pressure includes comprehensive metering so you can see exactly what the compressor is doing. All meters update in real time with no added latency.
Gain Reduction History
The GR History graph shows gain reduction over time as a scrolling waveform. This lets you see the compressor's behavior in context — how it responds to transients, sustained passages, and dynamic changes.
The display window ranges from 1–10 seconds. Longer windows help visualize mastering-style compression; shorter windows are better for fast-attack settings.
True Peak Meter
The true-peak meter uses 4× oversampled peak detection per ITU-R BS.1770, catching inter-sample peaks that standard sample-peak meters miss. This is critical for streaming delivery where lossy codecs can turn ISPs into audible clipping.
Peak hold shows the highest detected peak with configurable hold and decay times. The meter displays both left and right channels independently.
| Feature | Specification |
|---|---|
| Standard | ITU-R BS.1770 |
| Oversampling | 4× |
| Channels | Independent L/R |
| Peak Hold | Configurable hold & decay |
LUFS Metering
Pressure includes full LUFS metering per EBU R128 / ITU-R BS.1770-4 with four measurement modes:
Momentary
400 ms sliding window. Shows instantaneous loudness — useful for tracking peaks and transients in real time.
Short-Term
3 second sliding window. Smooths out fast changes to show the “feel” of loudness over phrases and sections.
Integrated
Cumulative measurement from start of playback (or last reset). This is the number streaming platforms use for normalization. Reset to start a fresh measurement.
Loudness Range (LRA)
The statistical range between quiet and loud passages, measured in LU. Low LRA (3–5 LU) indicates heavily compressed material; high LRA (10+ LU) indicates wide dynamics.
Spectrum Analyzer
The spectrum analyzer uses a 2048-point FFT to display the frequency content of the signal. It can show input, output, or both overlaid to visualize the tonal effect of compression.
The overlay mode is especially useful for seeing how different engine modes and TONE settings affect the spectral balance of your compressed signal versus the original.