Rev 4 Plate - Yamaha SPX1000 Operation Manual

a plate reverberator (REV 4 PLATE), and a special echo room
(REV 5 ECHO ROOM) in which you have extensive control
over the room's dimensions and other parameters.
PARAMETERS ACCESSED BY THE PARAM KEY
(Except 5. REV5 ECHO ROOM)
Reverb Time (REV TIME):
0.3 – 480 seconds (1 REV1 HALL, 3 REV3 VOCAL)
0.1 –480 seconds (2 REV2 ROOM, 4 REV4 PLATE)
The length of time it takes for the level of reverberation at 1
kHz to decrease by 60 dB + virtually to silence. In a live
setting, this depends on several factors: room size, room
shape, type of reflective surfaces, and others.
High Frequency Reverb Time Ratio (HIGH): 0.1 – 1.0
Natural reverberation varies according to the frequency of the
sound. The higher the frequency, the more sound tends to be
absorbed by walls, furnishings and even air. These two
parameters allow alteration of the high-frequency and low-
frequency reverb times in relation to the overall reverb time.
Diffusion (DIFFUSION): 0 – 10
The complexity of the many reflections that make up
reverberation varies according to the shape of the room and its
contents. In the SPX1000 the term "diffusion" refers to the
complexity of these reflections. If the DIFFUSION parameter
is set to "0," minimum complexity and therefore a clearer,
more straightforward reverb effect is produced. As the
DIFFUSION value is increased, the complexity of the
reflections increases producing a thicker, richer sound.
Initial Delay (INI DLY): 0.1 – 1000 milliseconds
This represents the time delay between the direct sound of an
instrument in a concert hall and the first of the many
reflections that make up reverberation.
High-pass Filter Frequency (HPF FRQ): THRU, 32 Hz
– 1 kHz
Permits rolling off the low-frequency content of the reverb
signal above the set frequency. The HPF is OFF when set to
THRU.
Low-pass Filter Frequency (LPF FRQ): 1 – 16 kHz,
THRU
Permits rolling off the high-frequency content of the reverb
signal above the set frequency. The LPF is OFF when set to
THRU.
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5. REV5 ECHO ROOM
Reverb Time (REV TIME): 0.3 – 480 seconds
The length of time it takes for the level of reverberation at 1
kHz to decrease by 60 dB + virtually to silence. In a live
setting, this depends on several factors: room size, room
shape, type of reflective surfaces, and others.
Room Width (WIDTH): 0.5 – 100.0 meters
Room Height (HEIGHT): 0.5 – 100.0 meters
Room Depth (DEPTH): 0.5 – 100.0 meters
These parameters make it possible to specify the main
dimensions of the echo room in meters. Basically, the larger
the dimensions of the room the longer the reverb sound.
Wall Variance (WALL VARY): 0 – 30
Irregularity factor refers to the relationship of the wall
surfaces in the echo room. At a setting of 1 all walls are
parallel. Higher settings increase the angles between the wall
surfaces, causing a distinct change in the reverb sound.
Listening Position (LIS. POSI.): FRONT, CENT., REAR
Allows position the "listener" to the front, center or rear of the
echo room in relation to the source sound.
High Frequency Reverb Time Ratio (HIGH): 0.1 – 1.0
Natural reverberation varies according to the frequency of the
sound. The higher the frequency, the more sound tends to be
absorbed by walls, furnishings and even air. These two
parameters allow alteration of the high-frequency and low-
frequency reverb times in relation to the overall reverb time.
Diffusion (DIFFUSION): 0 – 10
The complexity of the many reflections that make up
reverberation varies according to the shape of the room and its
contents. In the SPX1000 the term "diffusion" refers to the
complexity of these reflections. If the DIFFUSION parameter
is set to "0," minimum complexity and therefore a clearer,
more straightforward reverb effect is produced. As the
DIFFUSION value is increased, the complexity of the
reflections increases producing a thicker, richer sound.
Initial Delay (INI DLY): 0.1 – 1000 milliseconds
This represents the time delay between the direct sound of an
instrument in a concert hall and the first of the many
reflections that make up reverberation.
High-pass Filter Frequency (HPF FRQ): THRU, 32 Hz
– 1 kHz
Low-pass Filter Frequency (LPF): 1 – 16 kHz, THRU
Same as other reverbs.