Yamaha RX-V2500 Owner's Manual - Page 90

EDITING SOUND FIELD PARAMETERS EDITING SOUND FIELD PARAMETERS What is a sound field? Changing parameter settings A significant factor that creates the rich, full tones of a live instrument are the multiple reflections from the walls of the room. In addition to making the sound "live", these reflections enable us to tell where the player is situated, and the size and shape of the room in which we are sitting. ■ Elements of a sound field In any environment, in addition to the direct sound coming straight to our ears from the player's instrument, there are two distinct types of sound reflections that combine to make up the sound field: Early reflections Reflected sounds reach our ears extremely rapidly (50 ms - 100 ms after the direct sound), after reflecting from one surface only - for example, from the ceiling or a wall. Early reflections help add clarity to the direct sound. Reverberations These are caused by reflections from more than one surface - walls, ceiling, the back of the room - so numerous that they merge together to form a continuous sonic "afterglow". They are non-directional, and lessen the clarity of the direct sound. Direct sound, early reflections and subsequent reverberation taken together help us to determine the subjective size and shape of the room, and it is this information that the digital sound field processor reproduces in order to create sound fields. If you could create the appropriate early reflections and subsequent reverberations in your listening room, you would be able to create your own listening environment. The acoustics in your room could be changed to those of a concert hall, a dance floor, or virtually any size room at all. This ability to create sound fields at will is exactly what YAMAHA has done with the digital sound field processor. You can enjoy good quality sound with the factory preset parameters. Although you do not have to change the initial settings, you can change some of the parameters to better suit the input source or your listening room. The following parameters are not always found in every program. 1 Set AMP/SOURCE/TV to AMP. AMP SOURCE TV 2 Press TOP on the remote control. 3 Select Stereo/Surround, then press h. STEREO MUSIC ENTERTAINMENT MOVIE THEATER Munich Vienna Freiburg 4 Select the desired sound field program, then press h to access and adjust. Munich Vienna Freiburg DSP Level Init. Delay Room Size Note You cannot change parameter values when Memory Guard is set to "Guard". If you want to change the parameter values, set Memory Guard to "Free" (see page 64). Memory back-up The memory back-up circuit prevents the stored data from being lost even if this unit is set in the standby mode, the power cable is disconnected from the AC outlet, or the power supply is temporarily cut due to power failure. However, if the power is cut for more than one week, the parameter values will return to the factory settings. If this happens, edit the parameter value again. ■ Resetting parameters to the factory values To reset all parameters Use Surr. Initialize (see page 63). 86