DecayCore vs Conventional EQ-Based Room Correction
Conventional approach (typical IIR / minimum-phase EQ)
Many room-correction workflows:
- treat response errors mainly as magnitude EQ problems
- focus on PEQ/IIR fitting with limited phase-domain control
- do not directly control decay behavior
- can overfit reflection-driven dips and combing
Common consequences
- bass can get flatter but still ring
- narrow treble corrections can sound harsh
- results may change noticeably with small mic-position differences
DecayCore approach (current)
| Aspect | Conventional EQ | DecayCore |
|---|---|---|
| Input sources | usually frequency-response only | REW TXT + WAV/IR inputs |
| Propagation delay (TOF) | often implicit | explicitly removed before phase analysis |
| Phase strategy | mostly minimum-phase behavior | Linear / Minimum / Mixed / Asymmetric + optional 2058-safe mode |
| Excess-phase safety | limited | Mixed-phase fade + excess-delay and pre-ringing guards |
| Room modes / ringing | mainly amplitude shaping | Temporal Decay Control (TDC) with strength + max reduction + slope limit |
| Reflection handling | may invert combing dips | confidence-weighted correction + smoothing + A-FDW |
| Correction bounds | tool-dependent | explicit limits for boost/cut/slope/phase band and low-bass safety |
| Headroom handling | manual gain staging | auto-headroom gain model with configurable margin |
| Stereo consistency | often per-channel behavior | stereo-link options with a shared leveling anchor, shared or hybrid windowing, and channel-specific final auto-gain |
| Reproducible A/B | harder across fs/taps | optional comparison mode with fixed analysis grid |
| Multi-rate output | uncommon | native multi-rate FIR export |
| Runtime diagnostics | often limited | Summary version stamp, timing breakdown, and System Health checks |
Audible result (typical)
- tighter bass decay (less overhang)
- fewer “false-detail” treble corrections
- cleaner transients with safer phase behavior
- more repeatable tuning between runs
DecayCore intentionally avoids aggressive inversion and prioritizes corrections that remain stable and physically plausible.
Disclaimer
AI was used to translate this document from Finnish to English.
Summary
DecayCore intentionally avoids aggressive inversion and prioritizes corrections that remain stable and physically plausible.
- Get Started with DecayCore – Download the FIR filter maker.
- Read the FAQ – Common questions about convolution and REW.