Echo Room Reverb Programs; N 6. Rev6 White Room; N 11. Rev11 Tunnel; N 12. Rev12 Canyon - Yamaha SPX900 Operation Manual

MIDI Trigger (MIDI TRG.): OFF, ON
When this parameter is turned ON, a KEY ON EVENT
message from an external MIDI keyboard can be used to
trigger the gate. A KEY ON EVENT message is transmitted
whenever a note on a MIDI keyboard is played.
NOTE:
This effect can also be triggered by the front-panel
TRIGGER key or a footswitch plugged into the rear-panel
TRIGGER jack.

ECHO ROOM REVERB PROGRAMS

n 6. REV6 WHITE ROOM

n 11. REV11 TUNNEL

n 12. REV12 CANYON

n 13. REV13 BASEMENT

This is a special type of reverberation in which you have
extensive control over the room's dimensions and other
parameters.
PARAMETERS ACCESSED BY THE PARAMETER
KEY
Reverb Time (REV TIME): 0.3 – 100.0 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 – 34.0 meters
Room Height (HEIGHT): 0.5 – 34.0 meters
Room Depth (DEPTH): 0.5 – 34.0 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.
12
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): x0.1 –
x1.0
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 SPX900 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 – 200.0 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 FRO.): THRU,
32 Hz – 1.0 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 FRO.): 1.0 – 16 kHz,
THRU
Same as other reverbs.
Width Fine: -100 – + 100
This sets the value specified with WIDTH as the reference
value (0) and is the parameter for fine adjustment.