Abstract: A rolling element screw comprises a screw and a nut mounted on the screw. The screw and the nut are defined with opposite rolling grooves to form a loaded path in which plural rolling elements are to be disposed. The nut is provided with a return element at each of two opposite ends thereof for cooperating with the loaded path. The respective return elements include a return path, and the return paths of the two return elements connect with the loaded path to form a circulation path. The junction where the respective return paths of the return elements are connected to the loaded path is designed to be an inclined surface including a lower portion and an upper portion. There is a height difference between the nut rolling grooves and the respective return paths, so that the rolling elements can roll more smoothly without causing the jammed problem.

Abstract: A manipulator, in particular a small robot, has at least two motor mutually movable limbs with a motion axis of both limbs being acted on by an axle drive that has an external rotor motor, a position transmitter and a transmission. The transmission has at least one planetary gear set with a center gear and at least one planet meshing with it that also meshes with a ring gear and is mounted on a planet carrier. One of both limbs of the manipulators is torque proof connected with the ring gear and is mounted by this radial and/or axially, and the other is torque proof connected by both limbs of the manipulator with the planet carrier and is mounted by this radial and/or axially.

Abstract: A robot rotates frontward, rearward, clockwise, or counterclockwise such that a display device is matched with the eye position of a user. The robot includes a body, a display device, and at least one bending device. The display device includes a recognition unit to rotate about the body according to the position of the user. The recognition unit detects a position of a user. The bending device couples the body with the display device such that the body and the display device rotate frontward, rearward, clockwise, or counterclockwise according to a detection state of the recognition unit.

Abstract: Disclosed herein are a power supply unit for robots and a robot having the same. The power supply unit for robots supplies power to actuators installed within an arm, and includes a housing provided with at least two lines of bus bars in an inner reception space; and at least one power unit to branch off power transmitted to the bus bars through power supply lines.

Abstract: A robotic end effector system and method having a plurality of end effectors which are selectively suitable for particular applications on a workpiece. The end effectors include a resident controller adapted to execute tasks specific to the end effector and are rapidly attachable and removable from the robot for easy change over to different workpieces.

Abstract: A dual slider assembly for a mobile phone is provided which can perform semiautomatic bidirectional sliding operation using a single spring mechanism. The dual slider assembly includes a fixed plate. A first sliding plate is coupled to the fixed plate for sliding movement in a first sliding direction and is formed with a guide slot parallel to a second sliding direction. A second sliding plate is coupled to the first sliding plate for sliding movement in the second sliding direction. The dual slider assembly further includes an elastic means for applying an elastic force to maintain the first sliding plate and the second sliding plate in a stationary state, the elastic means having a first end pivotably secured to the fixed plate and a second end pivotably secured to the second sliding plate and restrained to slide along the guide slot of the first sliding plate.

Abstract: An expanding and retracting structure for a control shaft of a bicycle mounted on a cylinder member includes a positioning member, and an engaging member, the positioning member and the engaging member being disposed on a top end of the cylinder member, the engaging member being a locking loop to be quickly retracted or expanded its inner diameter and to move the positioning member, in the cylinder member being fixed a bolt element; a screw screwed in the bolt element and having a tab mounted on a top portion thereof; a shaft member pivotally connecting with the screw, and the screw and the shaft member being insert into the cylinder member, the shaft member including a positioning slot to insert the positioning member, at a predetermined position of the shaft member being connected a connecting tube.

Abstract: A lever (2) is disclosed that is rotatably mounted on the upper part of a manually manoeuvrable machine (1) for machining surfaces, that provides the rotation fulcrum (3) interposed between the head (20) of the supporting lever (2) of the front part of the palm of the hand (30) of the operator, and the tail (21) of the thrust lever (2) of the rear part of the palm of the hand (30) of the operator (FIG. 1).

Abstract: A control lever for a machine for machining surfaces is disclosed that comprises at least one housing for at least one tool, in particular for an L-shaped Allen key (6). Said lever comprises a housing (5) for the long shaft (7) and a housing (8) for the short shaft (9) of the Allen key (6).

Abstract: A protection device is described for the ends of a handlebar (M) of a motorcycle, of the type comprising a protection member which can be attached to the ends of said handlebar (M), which comprises a structural protection member (1) which can be attached with an attachment portion) (2°) to the ends of said handlebar (M), and having an aerodynamic guard (3) intended to be positioned in front of an actuation lever (L) of said handlebar (M) of the motorcycle, the aerodynamic guard being configured to reduce the dynamic pressure downstream thereof.

Abstract: The rigidity of a pivotally connecting portion to which a reaction force member or a transmitting member is connected through a connecting pin is increased to thereby prevent buckling and deformation, while keeping the plate thickness of a hollow-structured operating pedal small to minimize the weight and size thereof. A connecting opening portion is provided at the portion that is an outer circumferential portion of a hollow-structured operating pedal and is connected to connecting links Inside the connecting opening portion, a reinforcing member having a U-shaped section is integrally weld-joined so as to open outward. End portions of the connecting links are inserted inside the reinforcing member, and are relatively pivotablly connected by a first link pin. Accordingly, the rigidity of the operating pedal is improved, and at the same time, the stress concentration is relieved, whereby buckling and deformation are suppressed.

Abstract: A sensing mechanism of pedaling assistant system, including a crank and a sensing element. The crank includes an elongated first crank member and an elongated second crank member connected therewith. A first axial end of the first crank member is connected with a pedal component of a bicycle. A first axial end of the second crank member is connected with an axle of the bicycle. An end face of a second axial end of the second crank member abuts against an end face of a second axial end of the first crank member. The sensing element is disposed between the second axial end of the first crank member and the second axial end of the second crank member for detecting a force transmitted from the pedal component through the first crank member to the second crank member.

Abstract: The invention relates to an eccentric adjustment element (10) having a rod (12) provided on both ends with exterior threads (14, 16) of a smaller diameter to each of which unthreaded, inwardly profiled sections (18, 20) are fastened, wherein the shortest distance between a profile and a rotational axis of the rod is greater than the outer radius of the exterior threads (14, 16) and eccentric discs (24, 26) are fitted on each of the profiled sections (18, 20).

Abstract: A motor module is configured for attachment to a transmission housing of a modular transmission assembly. The motor module includes a motor and a support structure. The motor is configured for rotation about a central axis and extends between a first end and a second end. The support structure is operatively connected to the motor such that the support structure at least partially supports the motor. The support structure at least partially extends across the second end of the motor. The support structure is configured for internal attachment to the housing.

Abstract: The invention relates to a transmission for a motor vehicle having a rotatable transmission element arranged in a first section of the transmission; a store of liquid arranged in a second section of the transmission separate from the first section; a collection device for liquid thrown off by the transmission element having a return passage through which a first portion of the thrown off liquid can be returned to the first transmission section and an outlet to supply a second portion of the thrown off liquid back to the liquid store; and a passage for the liquid which connects the liquid store to the first transmission section and which has a temperature-controlled restrictor element functioning to inhibit the inflow of liquid from the liquid store into the first transmission section when a fluid temperature in the first transmission section falls below a temperature threshold value.

Abstract: A power transmission apparatus according to the present invention is characterized in that it comprises: a multistaged change-speed mechanism (3) having an input shaft (31) to which a rotary power that is output from an output shaft (21) of an internal combustion engine (2) is input, and an output shaft (32) for changing the rotary power, which is input from the input shaft (31), in speed with a plurality of switchable speed reducing ratios, and then outputting the resulting rotary power to wheels; a rotary electric device (4); a rotary-electric-device-side output shaft (43) for outputting a rotary power of the rotary electric device (4) to the wheels; a first power interrupting mechanism (51) for switching the connection and disconnection of rotary-power transmission between the input shaft (31) of the multistaged change-speed mechanism (3) and a rotor (4) of the rotary electric device (4); a second power interrupting mechanism (52) for switching the connection and disconnection of rotary-power transmission

Abstract: A method for manufacturing molten iron includes a step of charging a carbonaceous material, a flux, and solid reduced iron obtained by thermally reducing carbon composite iron oxide agglomerates into an arc melting furnace and melting the solid reduced iron using arc heating in the melting furnace while an inert gas is blown into a molten iron layer contained in the melting furnace from a bottom blowing tuyere disposed on a bottom of the melting furnace to stir the molten iron layer, wherein the carbonaceous material is charged so that a carbonaceous material suspending slag layer in which the carbonaceous material is suspended is formed in an upper portion of a slag layer formed on the molten iron layer by slag produced when the solid reduced iron is melted into the molten iron and so that a carbonaceous material coating layer composed of only the carbonaceous material is further formed on the carbonaceous material suspending slag layer, and the molten iron and the slag stored in the melting furnace are tapp

Abstract: A porous metal article having a predetermined pore structure. The porosity is provided by the use of an extractable particulate in a powder forming route to create a desired porosity. Extraction of the pore forming particulate prior to sintering of the powder minimizes contamination of the sintered article and allows for the processing of material sensitive to contamination such as titanium. Added functionality can be gained by co-forming the porous material with non-porous material to create an article with layers of differing characteristics. The article is suitable for use as an implant body is porous enough to facilitate tissue in-growth and bony fusion.

Abstract: An electrode is used to perform discharge surface treatment of a work piece. The electrode is made of a green compact obtained by compression-molding an electrode material including powder of any of a metal, a metallic compound, and ceramics. The discharge surface treatment includes generating an electric discharge between the electrode and the work piece in an atmosphere of a machining medium and forming a film consisting of a machining material on a surface of a work piece using energy produced by the electric discharge. The powder has an average particle diameter of 5 micrometer to 10 micrometers, and contains 40 volume percent or more of a component not forming or less easily forming carbide as a component for forming the film on the work piece. The electrode has a hardness in a range of B to 8B tested with a pencil scratch test for a coating film.

Abstract: An anti-oxidative agent for molten metal containing at least nonylphenol polyoxyethylene ether, organic amine, phosphoric acid, and phytic acid. A method of preparing the anti-oxidative agent for molten metal, by a) heating an organic amine to between 60 and 100° C., adding a nonylphenol polyoxyethylene ether, and stirring for between 3 and 5 min to yield a mixture; and b) cooling the mixture to between 30 and 100° C., and adding phosphoric acid and phytic acid and stirring for between 10 and 15 min. The anti-oxidative agent for molten metal has no flash point and spreads quickly on the liquid surface, providing high reduction efficiency at lost cost.

Abstract: The invention relates to a method for leaching a material containing a valuable metal and precipitating the valuable metal as a fine-grained powder by changing the electrochemical potential of an intermediary metal in the solution. In the leaching stage the intermediary metal or substance of the electrolyte solution is at a high degree of oxidation and in the precipitation stage another electrolyte solution is routed into the solution, in which the intermediary metal or substance is at a low degree of oxidation. After the precipitation stage the solution containing the intermediary is routed to electrolytic regeneration, in which part of the intermediary is oxidised in the anode space back to a high potential value and part is reduced in the cathode space to its low value.

Abstract: In accordance with the present invention there is provided a method for leaching one or more target metals from an ore, the method comprising the method steps of: curing the ore to be leached through the application of an aqueous solution of a curing agent, producing a cured ore; leaching the cured ore at atmospheric pressure through the application of an ammonium carbonate solution containing free ammonia, producing a pregnant leach solution; and passing the pregnant leach solution to a means for metals recovery.

Abstract: The present invention is related to an isolated chemolithotrophic bacterium belonging to species Acidithiobacillus thiooxidans named Licanantay, deposited in Deutsche Sammlung von Mikroorganismen and Zellkulturen GmbH-DSMZ with number DSM 17318, and its use in pure form or in mixtures that contains it for bioleaching processes of minerals or sulfured metallic species concentrates. This Licanantay strain DSM 17318 has sulfur-oxidizing activity in both primary and secondary sulfured minerals, especially in the case of chalcopyrite, covellite, bornite, chalcocite, enargite and tennantite.

Abstract: A method of separating rhodium from platinum and/or palladium includes; chloridizing a raw material including rhodium and at least platinum and/or palladium in chlorine atmosphere and obtaining a soluble salt of platinum and/or palladium; water-leaching chloridized material and dissolving platinum and/or palladium into a solution; filtering the solution; and leaving rhodium in a filtered residue of the solution.

Abstract: This invention relates to a fastener driving device including a variable ratio gear mechanism that enables the ratio of the rotation of the handle to the rotation of a driving bit extending from the handle to be varied to allow the bit to rotate at different speeds from the handle. The device includes a gear mechanism disposed within a housing for the device that includes a locking member and a biasing member. The biasing member urges the locking member into engagement with the gear mechanism to lock the gear mechanism in a configuration for a 1:1 gear ratio. A selector switch is secured to the device over the gear mechanism and is operable to move the locking member into and out of engagement with the planetary gears against the bias of the biasing member to provide an increased gear ratio for the gear mechanism when desired.

Abstract: This invention relates to a fastener driving device including a variable ratio gear mechanism that enables the ratio of the rotation of the handle to the rotation of a driving bit extending from the handle to be varied to allow the bit to rotate at different speeds from the handle. The device includes a gear mechanism disposed within a housing for the device that includes a locking member and a biasing member. The biasing member urges the locking member into engagement with the gear mechanism to lock the gear mechanism in a configuration for a 1:1 gear ratio. A selector switch is secured to the device over the gear mechanism and is operable to move the locking member into and out of engagement with the planetary gears against the bias of the biasing member to provide an increased gear ratio for the gear mechanism when desired.

Abstract: A wrench having a main body defines a first end, an opposite second end, and an axis extending therebetween. A handle body defines a first end, an opposite second end, and an axis extending therebetween, wherein the handle body first end is pivotally coupled to the main body second end. A handle is axially fixed and rotatably coupled to the handle body second end. A tang, having a first end configured to releasably receive a tool, an opposite second end, and an axis extending therebetween, is pivotally coupled to the main body first end. A detent is received in a recesses defined in one of the handle body first end and the main body second end.

Abstract: A socket connection device including a main body; a slide rod installed in the main body and slidable along the main body, a shallow depression and a deep depression being formed on a front end of the slide rod; and a ball body inlaid in a through hole of the main body. In normal state, a bottom edge of the ball body falls on the shallow depression and a top edge of the ball body protrudes out of the main body. When the slide rod moves to a position where the deep depression is aligned with the through hole, the ball body moves into the deep depression without protruding out of the main body. In the invention, a center of the ball body is positioned outside a bottom wall of the shallow depression. When fitting a socket on the connection device, the socket presses the ball body to drive the slide rod slide, whereby the ball body drops into the deep depression. Therefore, the socket can be directly connected with the device without performing any additional operation.

Abstract: A tooth for a circular saw or a mower drum that can be used to cut standing trees or brush and undergrowth. The tooth has four cutting edges arranged in a first pair of opposed cutting edges that are generally straight and a second pair of opposed cutting edges that are generally concave. The tooth is mounted in a holder in a first or second cutting position that orients a cutting edge of the first or second pair to physically contact and effect a cutting method to a cuttable material. In a first cutting method, a generally straight cutting edge contacts the material, resulting in a slicing action. In a second cutting method, a generally concave cutting edge contacts the material, resulting in a gouging action. Teeth in the circular saw or brush mower alternate between first and second cutting positions, allowing both cutting methods to be applied to cuttable material.

Abstract: A machine for cutting a continuously extruded tube into segments of lesser and predetermined length, comprising:—means (33) for actuating sliding means (3) that are movable along a guide (30) parallel to a direction (20) of advance; said sliding means (3) comprising a first and a second station (31, 32) for cutting the tube which in turn comprise respectively a first and a second shearing cutter (311, 312).

Abstract: A method of making a tube sump with integral clips from a single material modifies multiple lumen tubing of any material that allows for two or more lumens. Preferably, the tubing is a plastic polymer with dual lumens. One lumen functions as a suction tube and the other lumen undergoes modification to form tubular clips. The modification removes a pattern of tubing opposite the suction tube to form integral clips that retain the tube sump upon an existing endotracheal tube. The removed sections of lumen may have any length or number. Common methods to remove the lumen sections include mechanical cutting, sawing, laser cutting, thermal cutting, melting, ablating, and shearing. Alternatively, the clips may be formed during the manufacture of the multiple lumen tubular product.

Abstract: A liquid cutting device employing pressurized working liquid which includes a nozzle assembly. The assembly includes a plurality of liquid jet nozzles, each nozzle of which has a nozzle axis. The plurality of nozzles are arranged so that their nozzle axes intersect at an intersection point located at a predetermined distance downstream from the nozzles. The device also includes an apparatus for delivering the pressurized working liquid to the nozzles. Each of the nozzles is configured to selectably emit a liquid jet operative to cut through a target material. The liquid jets emitted from the nozzles interfere and disperse each other when meeting at the intersection point and the liquid jets are atomized. The device includes a spacer element adjustably mounted onto the nozzle assembly, which increases or decreases the cutting depth of the device. A method for employing the liquid cutting device is also discussed.

Abstract: Woodworking machines are disclosed having electrically conductive cutting tools adapted to cut workpieces. The machines include a contact detection system capacitively coupled to the cutting tool, and adapted to detect contact between a person and the cutting tool. The machines also include a reaction system configured to cause one or more predetermined actions to take place upon detection of contact between a person and the cutting tool by the contact detection system.

Abstract: A machine tool having a safety unit. The machine tool also having a calibration unit for calibrating the safety unit.

Abstract: A machine such as a saw, jointer, planer, etc. is disclosed. The machine has cutting tool, a direct drive mechanism configured to move the cutting tool, a detection system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool, and a reaction system adapted to mitigate the unsafe condition upon the detection of the unsafe condition by the detection system. An electrical signal is imparted on the cutting tool, and the signal is used to determine the occurrence of the unsafe condition. The direct drive mechanism is electrically isolated so that the electric signal may be imparted on the cutting tool. The electric isolation may be achieved through configurations such as insulated bearings, a substantially non-conductive housing, and a substantially non-conductive coupling joining two shaft portions.

Abstract: The present invention relates to a device for braking or locking a shaft (6) of a microtome (1). The microtome (1) comprises the shaft (6), an actuating element (2), a movement mechanism (37) and a housing (38). With the movement mechanism (37) an object to be cut can be moved relative to a knife blade. The actuating element (2) can be manually actuated by an operator. As a result thereof, the shaft (6) can be rotated. Via the shaft (6), the movement mechanism (37) for performing the relative motion between the object and the knife blade can be driven. Further, the present invention relates to a method for operating a device for braking a shaft (6) of a microtome (1). So that the device can be used in a mechanically formed movement mechanism (37), the inventive device is characterized by an actuator and a braking unit (25). The braking unit (25) is connected in a rotatably fixed manner to the shaft (6).

Abstract: A power saw that has a device that allows for small changes in miter angles, where the small changes in miter angels can be made quickly as well as removed quickly. Additional the device makes it clear whether the angle adjustment is or is not in place.

Abstract: A clamping assembly for driving a knockout punch is provided. The clamping assembly has an outer member, an inner member, and wedges that are guided by keyways on the inner member. A user pushes onto the inner member, which causes the wedges to contact a cam surface on the outer member, which forces the wedges in a radial inward direction until threads provided on said wedges clamp onto complimentary shaped threads on a draw stud.

Abstract: A guide rail assembly for securement of a tube cutting apparatus for cutting of boiler tube walls to a fixed point on a tube wall, while allowing lateral repositioning of a cutting tool relative to the tube wall. The assembly includes a guide rail having a convex surface along which a carriage having a cutting device may be fixedly positioned by mating friction engagement of a concave surface of pairs of linear guide blocks secured to the carriage with the convex surface of the guide rail.

Abstract: A scribing system comprising a mounting mechanism, stylus, and force generating mechanism is provided. The mounting mechanism is configured to rotate an elongated object in such a manner that the object is subjected to a bow effect wherein a middle portion of the object bends relative to the end portions of the object. The stylus is for scribing the object at a position x along the long dimension of the object while the mounting mechanism rotates the object. The force generating mechanism is connected to the stylus so that the stylus applies the same constant force to the elongated object regardless of the position x along the long dimension of the object that the stylus is positioned, while the mounting mechanism rotates the object and thereby subjects the object to the bow effect, thereby scribing the object.

Abstract: According to an embodiment, a plectrum apparatus comprises a ring capable of being releasably mounted to a user's finger, and a harness capable of releasably securing a plectrum, the harness being hingedly coupled to the ring. In one embodiment, a first spring is further provided and configured to bias the harness in a stowed position. A plectrum secured to the harness may be positioned toward a thumb side of the user's finger in the stowed position when the ring is mounted on the user's finger. The harness may be further capable of being retracted in a deployed position, the plectrum secured to the harness engaged between the user's finger and thumb.

Abstract: The present invention in several embodiments is a plectrum or pick that is used to strum or pick the strings of guitars, bass guitars, ukuleles, mandolins or other stringed instruments. This pick has apertures disposed therethrough at predetermined locations. Such apertures provide a gripping means which enables a user to grasp and control such pick. The device makes it less likely that a user will drop or lose his or her pick while playing. The apertures provide finger to thumb contact, allowing the musician to better manage the pick in their hands.

Abstract: A connection device for a drum set has a connecting bridge, multiple resilient pads and a clamping device. The connecting bridge has a base board and two connecting arms. The connecting arms protrude respectively from two sides of the base board and each has a connecting end for connection to an adjusting rod attached to a drum shell of a drum. The resilient pads are mounted respectively on the connecting ends of the connecting arms and are mounted around the adjusting rods. The clamping device is securely mounted on the base board and has a clamping base, a clamping leaf, a locking rod and a locking element. Therefore, the connection device allows the drum to vibrate for improved timbre.

Abstract: An electronic high-hat circuitry system allows the drummer to manually choose the sounds that an electronic high-hat makes when the drummer's foot is off of the pedal and the high-hat instrument is struck. When the pedal is at or near the top of its travel, a primary circuitry switch disables normal foot-controlled positioning circuitry and enables a secondary circuit that sends a manually selected positioning signal to a drum module. When the pedal is again pressed down, the primary circuitry switch returns control to the primary, pedal controlled circuit. An optional tertiary circuit allows for the choosing of a different sound when the secondary circuit is activated and the high-hat cymbal is tilted, and is used primarily for accent notes. A control panel is used by the drummer to select the desired high-hat sounds of the secondary and tertiary circuits.

Abstract: A musical guide and method for guitar playing includes providing a musical guide including a series of scales, chords or notes in the form of a temporary tattoo or sticker. The tattoo or sticker may be placed on the forearm of the user. As such, the user can match the sound to the note by glancing at their arm when needed. The student will be able to quickly find scale patterns by looking at their forearm.

Abstract: A method for visually expressing music includes marking a region of a stave to identify a musical note's pitch, wherein the stave includes four lines each of which is parallel or substantially parallel to the other three lines, and each of which defines at least three regional positions where a mark can be made to identify a musical note's pitch, wherein the stave includes at least twelve regional positions and each of the at least twelve regional positions corresponds to a unique pitch of a musical note within a musical octave. The method also includes marking the region of the stave to also identify the duration of the musical note. With at least twelve regional positions defined by the stave, each of the 12 pitches in an octave can have a position within the stave that uniquely identifies the pitch of the note.

Abstract: An audio playing method is provided. The method includes: accessing an audio file from a data storage; transmitting the audio file to a decoder to decode and outputting the decoded audio file through the audio output unit; determining whether a skipping command is received from an input unit; determining the desired section according to the received skipping command if the skipping command is received from the input unit; accessing the starting address of the desired section from the control part, and playing the main audio part from the starting address.

Abstract: A portable device is disclosed for use with an audio or video content provider to establish hands-free control of the available functions of the content provider. The device may include a microphone interface to receive an electric signal from an integral or an externally plugged in microphone which, through use of a processor, may permit digitization of the signals, and comparison to a template of digital signals representing known voice commands that may be transmitted to the content provider. Non-volatile memory utilized in conjunction with the processor enables extended customization capabilities which are retained for later use, even after the device has been powered off. Operation of the device may alternatively occur according to default factory settings, or user programmed custom settings. Customizable features may include user trained voice commands, volume settings, sound effects, voice recognition thresholds, tone settings, and album lists.

Abstract: An Apparatus for Percussive Harmonic Musical Synthesis (APHAMS) which facilitates state-of-the-art musical expression, through generation of melodic sound, bearing well defined tone and note pitch, by the striking of uniquely configured multiple note activitation trigger mechanism surfaces, termed muzi-pads, with an appropriately sized mallet, stick, or other such similar playing implement, for the generation of a desired note, by a given MIDI device and which provides an enhanced emulation of the traditional tenor steelpan, in its interface with the player.

Abstract: A portable multi-functional audio sound system has an enclosure and control panel with an optional display on a front portion of the enclosure. The control panel provides for selection among menu options which are presented on the display. An audio input is coupled for receiving a live audio signal. An electronic circuit receives user commands from the control panel and displays configuration information on the display. The electronic circuit has an amplifier for amplifying the live audio signal, and a synthesizer for generating programmable audio signal in response to a MIDI data stream. The MIDI data stream is routed to the digital signal processor or to the synthesizer. A digital signal processor controls the menu options on the display. A speaker is mounted within the enclosure and coupled for receiving a combined signal of the live audio signal and the programmable audio signal.