- 11,143 Posts. Joined 11/2003
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I'd leave both Off generally.
I believe Dynamic EQ is based on the Fletcher–Munson curves of loudness and frequency sensitivity of human hearing and calibrated against the AVRs 0db Reference Level. So if your source input is too loud and you turn down the level on your AVR, say to -30db, there'll be too much (mainly Bass) compensation applied. You'll notice with DVDs over HDMI cable (digital audio input) you have to bring your AVR to -10db, -5db or even higher. This is because DVDs are calibrated to a standard reference level. Audio CDs and digital downloads don't have any universally-agreed reference level and all try be be louder than their competition, thereby overloading the calibration and causing your sound to be (primarily) Bass heavy, muddy and unclear.
You can use one trick to calibrate your audio: play the DVD and CD of the same recording and adjust the source output of the CD system so both are at a similar loudness. That way you have a sort of reference going forwards, and if an audio file is louder or softer than another, adjust the source levels, not the AVR level. Make the change in Input Settings, Source Level.
The other solution, since CDs vary in loudness, is to use MediaMonkey as your playback source and set it's Volume Leveling to 85db. You might be shocked to see many recordings are on average more than 13db louder than they should be - what a waste of the potential dynamic range digital recordings can offer!
Or turn On Dynamic EQ only for DVDs.
Re the Dynamic Vol settings, it reduces the differences between the loudest and softest sounds. Great if you're watching an action movie late at night and don't want that bomb blast to wake the rest of your family or your neighbors I even use it with background music for when I'm having a dinner party. Turn it Off of course when you want the full dynamic range of your music and movies to come through.