What is DecayCore?
DecayCore measures how your speakers and room behave together, then makes FIR correction filters for your playback system. It is for the familiar situation where you like your speakers, love your records, and suspect the room is getting rather too involved in the bass line.
Was DecayCore formerly called CamillaFIR?
Yes. The name changed from CamillaFIR to DecayCore to avoid confusion with CamillaDSP. They still work together. There are already enough similar names to remember in a hi-fi rack.
Does DecayCore work only with CamillaDSP?
No. CamillaDSP is one option. You can also load the generated filters into other convolution engines that accept compatible WAV impulse responses. Check the required format, sample rate, and channel routing for your player before loading them.
Is DecayCore mainly a boost tool?
No. Most of the work comes from controlled cuts and modest shaping. Boost is deliberately limited. If the room cancels a note at your seat, asking the woofer to try harder can use up headroom without solving much. That is a good moment to look at placement, rather than reach for another 6 dB.
Does DecayCore include measurement?
Yes, and it is the recommended starting point. Packaged releases include guided measurement of the speaker response, RT60 decay, and harmonic distortion. See Measurement for current platform support and routing requirements.
Should I measure with DecayCore or REW?
Choose DecayCore’s guided measurement when your setup supports it. It records the sweep and saves RT60 decay data and harmonic distortion curves alongside the speaker response. The correction gets measured information about lingering bass and where extra boost may be unwise. Hi-fi has enough educated guesswork around the equipment rack already.
REW imports are still supported. A suitable impulse-response WAV can provide RT60, but a standard frequency-response text export does not contain the recorded decay, and normal linear IR exports do not bring the separate harmonic curves with them. The advantage is the complete measurement session available to DecayCore. If you import files, keep phase, timing, gain, and channel references consistent.
Where can I download DecayCore?
Download DecayCore from the official GitHub releases page:
The packaged release also includes guided measurement and Automatic mode.
DecayCore behaves strangely — what should I try first?
Open About DecayCore → Maintenance. Use Clear automatic-mode caches for unexpected Automatic results or Reset settings to defaults for a damaged configuration. Neither action removes measurements, target presets, or exported filters.
If the app does not start, use the platform cleanup script in config_delete/. Configuration and Data Paths lists the affected files.
Is DecayCore open source?
No. The public source repository is source-available for non-commercial use and is frozen at version 1.2.5. It includes Basic and Advanced manual filter generation. Releases after 1.2.5 are built from a private repository and are free for non-commercial use. Guided measurement and the Automatic mode decision engine are proprietary and available in packaged releases. See the source repository for the available code and license terms.