In-depth presentation on the fundamentals of "proper" Digital Room Correction (DRC).
Includes hands-on DSP FIR Filter Designer demos using Acourate and Audiolense.
Having participated in many audio forum discussions, having watched online videos on Digital Room Correction (DRC), and having reviewed over a dozen DRC products over the past 11 years, I have come to two conclusions. One is that there is considerable misunderstanding about DRC, how it works and even what problems DRC is trying to solve. And, just as important, understanding what is possible using the SOTA of DRC. I hope you find the content educational and practical.
This presentation assumes some basic understanding of loudspeaker measurements, room acoustics, and psychoacoustics, the latter being the science of how we perceive sound.
00:00:00 Intro and overview
00:04:14 DSP revolution
00:10:20 DSP modelling
00:13:02 DSP modelling loudspeakers
00:19:42 Measuring loudspeakers
00:26:17 The room is in control
00:34:22 Minimum phase in room acoustics
00:36:12 Acoustic and psychoacoustic issues in room correction
00:42:29 DSP modelling room correction
00:44:21 FIR filter basics
00:45:30 Psychoacoustic filtering
00:46:23 Frequency dependent windowing
00:53:20 Lets design a FIR filter
00:54:03 Acourate FIR filter design
01:09:55 Audiolense FIR filter design
01:26:49 Hang Loose Convolver FIR filter listening
01:33:11 FIR filter acoustic verification measurements
01:42:57 Conclusions
01:46:56 SOTA DRC/DSP FIR filter designer software
01:49:55 About me
Presentation with links: https://accuratesound.blob.core.windows.net/sotadrc/Understanding_the_SOTA_of_DRC.pdf
Book: Accurate Sound Reproduction using DSP https://www.amazon.com/dp/B01FURPS40
Website: https://accuratesound.ca/