User manual LEXICON LXP-15-II

[. . . ] LXP-15 II Multi-Effects Processor Owner's Manual Unpacking and Inspection After unpacking the LXP-15 II, save all packing materials in case you ever need to ship the unit. Thoroughly inspect the LXP-15 II 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. [. . . ] This makes the pitch variations seem more random, more like what actually happens when a performer dubs in a second part. Chorusing is closely related to the doubling effect, but is more suggestive of a rotary speaker. The delay times used are usually somewhat shorter (20ms), the LFO modulation may be a little more exaggerated and, very often, feedback is introduced to increase the intensity of the effect. There are many possible variations of the chorusing effect; some shade into flanging, or doubling, or even echo. The LXP-15 II provides a Chorus Delay algorithm which allows all of these variations. Originally, flanging effects were created by simultaneously playing two identical programs on two tape recorders. By using hand pressure against the flange of the tape reels, one machine was slowed down slightly, then the other. The result was a series of changing phase cancellations and reinforcements, providing a "comb filter" and a characteristic swishing tunneling and fading sound. Flanging with a delay is much simpler; two tape recorders need not be kept in relative sync. In fact, no tape machine is necessary -- flanging can be done as a live effect. A short delay (5-10ms), modulated by an LFO, is mixed with the original signal, causing cancellation (nulling) at a frequency whose period (the time for one cycle) corresponds to twice the delay time. The depth of cancellation depends on the level balance of direct and delayed sounds; maximum cancellation occurs at a 50-50 mix. The flanging effect can be further altered by recirculating the delay with the feedback control. Larger amounts of feedback cause exaggerated "deep" flanges. Use of the envelope follower produces an interesting "talking flange"; where a sweep is produced for each attack of the input. Envelope and sine wave modulation can be mixed for a complex sweep which is really quite pleasing. Vibrato Doubling Chorusing Flanging 4-3 LXP-15 II Owner's Manual Lexicon Resonant Effects Singing in the shower is one way to obtain a moderate, natural resonant effect. Startling resonances are possible with the LXP-15 II by using short delay times with a lot of feedback. This causes a build-up of fundamental notes and harmonies whose period (the time for one cycle) is equal to the set delay time. The effect can be characterized as adding a ringing, metallic quality to the sound. The pitch and tone of the resonance is affected by delay time, phase, amount of feedback, and output mix. Care must be taken to keep feedback below the point where the unit will spontaneously oscillate (runaway feedback). Use of the Hi and Lo cut filters allows greater amount of feedback to be used. Long Delay Effects When the delay time is equal to, or greater than, the time for a single beat of the music, it becomes possible to play counterpoints and harmonies against previously-performed phrases. [. . . ] If the unit has been subjected to temperatures below 32°F (0°C) or above 95°F (35°C), it should be turned off and allowed to return to normal temperature before use. The unit may be damaged by exposure to temperatures below -22°F (-30°C) or above 167°F (75°C), or by exposure to humidity in excess of 95%. If a unit exposed to such conditions fails to operate after it returns to a normal operating temperature, contact Lexicon Customer Service. Overheating No output from the LXP-15 II. If you don't have a control source patched to a destination, the controller will go to its minimum value! [. . . ]