How to Do Room Measurements Using REW Software

Описание: This is a tutorial on how to use the REW acoustic measurement program to make in-room measurements of your home theater system. This guide will teach you what you need to assemble a cost effective and highly accurate room analyzing system using your PC, free license of REW, a USB powered microphone and accessory cables. We go over the various measurement options REW offers and how to use them effectively to make accurate measurements.

Download the latest version of REW here:
https://www.roomeqwizard.com/

Recommended Measurement Gear and Cables:
Dayton Audio UMM-6 USB Microphone: https://amzn.to/2JfIsOR
BAFX SPL Meter: https://amzn.to/2GX8jti
15 foot 4K HDR HDMI Cable: https://amzn.to/2GWLllK

Recommended AV Components for 5.1.4 Atmos System:
Marantz SR7013 9.2CH Atmos/DTS:X AV Receiver: https://amzn.to/2GXEusz
SVS 5.1 Prime Speaker System: https://amzn.to/2GWTWFa
2 pairs SVS Elevation Speakers: https://amzn.to/2LgqFtf
Amazon FireStick 4K: https://amzn.to/2GX8tko

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0:00 Introduction
0:23 What is REW
0:59 Hardware needed
1:46 Microphone placement
2:16 How to setup REW
2:39 Calibration file (important!)

How and why we measure
----------------
2:52 How to measure
3:29 Smoothing (how much?)
3:57 Measuring both left and right speaker
5:06 Labeling measurements
5:38 How many measurements to take
6:14 Why we need more than one measurement
6:52 How to solve dips in the frequency response
7:35 Proper chart scaling
8:32 When to remove smoothing
8:54 What to not EQ
10:40 The Schroeder frequency
11:22 Timing reference

Simulation
----------------
12:47 Simulating room modes and SBIR
12:56 What are room modes?
13:34 What is SBIR?
15:36 Why use multiple subwoofers?
15:55 Ported vs sealed subs/speakers
17:17 What frequencies to treat and how
19:25 Why simulations are not accurate
21:23 Individual subwoofer delay
22:06 Other simulation software
22:38 Running the main speakers full-range
24:06 Sealed vs open rooms
24:37 Why placement is so critical

Other measurements / wrapping up
----------------
25:40 Impulse response
26:10 Steady-state response
26:29 RT-60 (reverberation / decay)
27:10 Waterfall plots
29:30 Distortion plots
31:24 Wavelet / Spectrogram

Outro
----------------
33:14 Summary (what equipment you need)
33:25 Summary (what we've learned in this video)