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アンプ Yamaha DSP-A990のPDF 操作マニュアルをオンラインで閲覧またはダウンロードできます。Yamaha DSP-A990 50 ページ。 Digital sound field processing amplifier
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3-2. DESCRIPTIONS OF THE DIGITAL SOUND FIELD PARAMETERS
Not all of the following parameters are found in every program.
ROOM SIZE
How it Affects the Sound:
Changes the apparent size of the music venue. The larger the
value, the larger the simulated room will sound.
What it Does:
Adjusts the timing between the early reflections. Early reflections
are the first group of reflections you hear before the subsequent,
dense reverberation begins.
Control Range:
0.1 – 2.0
Standard setting is 1.0.
Changing this parameter from 1 to 2 increases the apparent
volume of the room eight times (length, width, and height all
doubled).
Level
Level
Direct sound
Early reflections
Small
Time
Small space
42
Level
Direct sound
Direct sound
Early reflections
Early reflections
Large
Time
Large space
INIT DLY (Initial Delay)
How it Affects the Sound:
Changes the apparent distance from the source sound.
Since the distance between a sound source and a reflective
surface determines the delay between the direct sound and the first
reflection, this parameter changes the location of the sound source
within the acoustic environment.
What it Does:
Adjusts the delay between the direct sound and the first reflection
heard by the listener.
Control Range:
1 – 49 milliseconds
For a small living room this parameter would be set for a small
value. Large values for a big room. Larger values produce an echo
effect.
Level
Small
Time
Time
INIT. DLY
Level
Level
Direct sound
Early reflections
Large
Time
INIT. DLY
Time
INIT. DLY