MidiMagic
2K Club - QQ Super Nova
- Joined
- Jul 5, 2010
- Messages
- 2,245
I don't exactly agree, while side images are not nearly as precise as front images they still exist even without turning your head, The effect is much better if the front and rear speakers are closer together. In a long deep room you will of course get the hole in the middle effect and hear the image from the closest speaker, or perhaps hear two distinct sources. Ambisonics might be able to remedy that but how is Dolby encoding or decoding going to change anything? I prefer having the rear speakers placed off to the sides rather than behind me, the rear left and right signals are then clearly heard to the sides and panned signals move more clearly front to back across the sides.
It's not in the encoding. The Dolby encoding is the same as QS as far as the recorded matrix signal is concerned. The same pan position in the room produces the same signal in both systems.
The Dolby surround and Dolby PL-I and PL-II decoders place a small delay in the surround channel(s). This makes the precedence effect work as long as your head is facing forward, and also works somewhat in other head orientation.
Look at a sound panned straight to the left. The left channel speaker puts out the major sound. But the surround channel also produces a delayed sound that steers the hearing system to locate the sound to the left rather than the left front.
Using the same recording I made, the panned sound moves slowly from left back to left front in Dolby Surround. With QS, it seems to suddenly jump from left back to left front at approximately the point where it is panned straight left in the recording.