User manual LEXICON LXP-15

[. . . ] LXP-15 Multi-Effects Processor Owner's Manual Unpacking and Inspection After unpacking the LXP-15, save all packing materials in case you ever need to ship the unit. Thoroughly inspect the LXP-15 and packing materials for signs of damage. Report any shipment damage to the carrier at once; report equipment malfunction to your dealer. Notice This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer's instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designated to provide reasonable protection against such interference in a residential installation. [. . . ] The art of synthesizing sounds such as these is now commonplace. The simulation of effects is more concerned with our perception of sounds and, generally, requires synthesis of the environment in which sounds occur -- effects can create the impression of a piano playing in a padded cell, for example, or in a concert hall. All sounds are affected by their environment. From the moment a sound is generated and begins to travel (at the rate of one foot in about . 9 milliseconds), it begins to change -- merely passing through the air absorbs some of its energy. In the real world, sounds are distorted in a variety of ways between the time they occur and the time it takes them to reach our ears. They bounce off of near and far surfaces, each of which absorbs some of their energy and reflects them in various directions. Sounds seem to change in pitch when generated by moving objects as they approach and recede from us. Our perception of sounds changes as we approach their source, and as we hear them in different settings. Even the difference in the amount of time it takes a sound to reach our two ears contributes to the audio clues we use to identify sounds and to accurately locate their sources. All of these characteristics can be used to simulate environments, to create the effect of sounds reaching us from a great distance, of performances in vast halls or tiny rooms. Extensive research into the acoustic properties of rooms, etc. The basic parameters of different environments have already been defined and are at your disposal when creating your own effects. Sounds and Effects 4-1 LXP-15 Owner's Manual Lexicon Reflections When a sound is reflected from walls and other surfaces, it loses some of its high frequency content. If the surface is soft, or padded, such as a curtain or rug, more high frequency content will be lost than if the surface is hard like tile or paneling. Harder surfaces give rise to more reverberation; they are more "live". True echo occurs when a sound bounces off an acoustically hard surface; its return is heard as a distinct repetition of the original sound. When synthesizing an echo, the level and the high frequency content of the delayed sound, relative to the original sound in the output mix, gives audible clues as to the hardness of the reflecting surface(s). The intial delay time determines the impression of the relative distance between the sound source, the imaginary reflecting surface, and the listening position. Long delay times provide a very distinct repetition of the source. Recirculation of the delayed sound (feedback) provides multiple repetitions, and suggests two or more reflective surfaces that are bouncing the sound back and forth. An echo of around one-tenth of a second (100 milliseconds) delay time can be heard as a distinct repetition of the original, but is so close that it is heard more as a rhythmic enhancement rather than as a separate sound. A repeat of this type is commonly called a "slap echo". Often, the delay time is carefully adjusted so that a simple relationship exists between the tempo of the music and the delay time. [. . . ] The LXP-15 doesn't respond to MIDI. · Check to make sure a MIDI cable is connected to MIDI OUT of the external device and to MIDI IN on the LXP-15. · Verify that you have the LXP-15 and the external device communicating on the same MIDI Channel. A MIDI indicator in the upper lefthand corner of the display will flash to indicate the LXP-15 is receiving MIDI data on the selected channel. [. . . ]