reference will now be made in detail to the presently preferred embodiments of the invention , examples of which are illustrated in the accompanying drawings . throughout the following detailed description , the same reference numerals refer to the same elements in all figures . in the following description , a dvd player is used as an example of a source of karaoke content ( e . g ., music with suppressed vocal tracks , lyrics and video ) and a television or tv is used as an example of an output device that includes sound amplification and reproduction as well as video display . there are many other content sources such as personal computers , cd players , tape players , laser disc players , and the present invention is not limited in any way . there are many other output devices that include sound amplification and reproduction as well as a display , either in an integrated package or in individual components . examples of such are stereo systems , monitors , personal computers , etc . for simplicity , the block diagrams exclude a source of operating power . power supplies including batteries and transformers are well known in the industry . referring to fig1 , a block diagram of a system of a first embodiment of the present invention is shown . in this example , a dvd player 10 has a video output 13 connected to a television 20 . the left and right audio output from the dvd player 10 is connected to the karaoke device 30 with wires 12 / 14 . the wires preferably have rca phono plugs to plug into most standard audio output jacks included on dvd players . the karaoke device 30 is hand - held and preferably shaped similar to a standard microphone . a voice pick - up element 32 is situated on an outer surface of the karaoke device 30 in a location where it can receive sound waves corresponding to the user &# 39 ; s voice . the voice pick - up element converts the sound waves into an electrical signal that is connected to an amplifier 38 that adjustably 39 amplifies the user &# 39 ; s voice to a level compatible with the audio outputs 12 / 14 from the dvd player 10 . in the preferred embodiment , the amplifier &# 39 ; s output is adjusted by a multi - position switch connected to a resistor ladder . in other embodiments , the amplifier &# 39 ; s output is adjusted with a potentiometer or a digital potentiometer having a volume - up and a volume - down push button switch . for most dvd players , the audio output level is usually around 1 volt , peak - to - peak . the audio output signal from the adjustable amplifier 38 interfaces to a selector switch 46 and a sound processor 40 . the sound processor 40 enhances the user &# 39 ; s voice by adding , for example , echo . the selector switch 46 lets the user select either audio from the voice pick - up element 32 or from the sound processor 40 . in some embodiments , the selector switch is integrated into an on / off power switch ( not shown ) having three positions such as off , on and on / echo . the audio output from the selector switch is mixed with the left input 12 by amplifier 36 producing a mixed left audio signal and with the right input 14 by amplifier 34 producing a mixed right audio signal . the outputs of the amplifiers 34 / 36 pass to another selector switch 42 that selects to either pass the left and right audio from the dvd player 10 directly to the outputs or pass the mixed audio to the outputs . the outputs of the karaoke device 30 pass on cables 22 / 24 to the television 20 . again , it is preferred to have rca phono jacks on the end of the cables 22 / 24 for compatibility with most televisions . referring to fig2 illustrates a block diagram of a system of a second embodiment of the present invention is shown . in this example , a dvd player 10 has a video output 13 connected to a television 20 . the left and right audio output from the dvd player 10 is connected to an audio transceiver 60 with wires 12 / 14 . the wires preferably have rca phono plugs to plug into most standard audio output jacks included on dvd players . the audio transceiver 60 has a modulator 62 ( either analog or digital modulation ) that modulates the left and right audio onto a wireless carrier such as a radio frequency or an infrared light frequency . many methods of modulation such as amplitude modulation ( am ), frequency modulation ( fm ) and quadrature modulation ( qam ) are known in the industry and any can be used without veering from the present invention . in the example shown , the audio signals are modulated onto an rf signal that passes through an antenna mixer 66 to an antenna 68 where the modulated rf signal radiates and is picked up by an antenna 47 on the karaoke device 30 . the karaoke device 30 is hand - held and preferably shaped similar to a standard microphone . the modulated audio signal from the antenna 47 passes through an antenna mixer 45 and is demodulated by a demodulator 41 into left and right audio signals representative of the left and right audio signals from the dvd player 10 . a voice pick - up element 32 is situated on an outer surface of the karaoke device 30 in a location where it can receive sound waves corresponding to the user &# 39 ; s voice . the voice pick - up element is connected to an amplifier 38 that adjustably 39 amplifies the user &# 39 ; s voice to a level compatible with the audio outputs 12 / 14 from the demodulator 41 . in the preferred embodiment , the amplifier &# 39 ; s output is adjusted by a multi - position switch connected to a resistor ladder . in other embodiments , the amplifier &# 39 ; s output is adjusted with a potentiometer or a digital potentiometer having a volume - up and a volume - down push button switch . for most dvd players , the audio output level is usually around 1 volt , peak - to - peak . the audio output signal from the adjustable amplifier 38 interfaces to a selector switch 46 and a sound processor 40 . the sound processor 40 enhances the user &# 39 ; s voice by adding , for example , echo . the selector switch 46 lets the user select either audio directly from the voice pick - up element 32 or from the sound processor 40 . in some embodiments , the selector switch is integrated into an on / off power switch ( not shown ) having three positions such as off , on and on / echo . the audio output from the selector switch is mixed with the left input by amplifier 36 and with the right input by amplifier 34 . the outputs of the amplifiers 34 / 36 pass to another selector switch 42 that selects to either pass the left and right audio from the dvd player 10 to the outputs or pass the mixed audio to the outputs . the outputs of the karaoke device 30 are modulated in a similar way to the modulator in the audio transceiver 60 modulator 62 by another modulator 43 . the modulated signal passes through the antenna mixer 45 and is radiated by the antenna 47 . the radiated modulated audio signals are received by the audio transceiver &# 39 ; s 60 antenna 68 and pass through the antenna mixer 66 and are demodulated by a demodulator 64 . the audio output of the demodulator 64 passes on cables 22 / 24 to the television 20 . again , it is preferred to have rca phono jacks on the end of the cables 22 / 24 for compatibility with most televisions . referring to fig3 , a block diagram of a system of a third embodiment of the present invention is shown . in this example , a dvd player 10 has a video output 13 connected to a television 20 . the left and right audio output from the dvd player 10 is connected to a base station karaoke device 70 with wires 12 / 14 . the wires preferably have rca phono plugs to plug into most standard audio output jacks included on dvd players . the base station karaoke device 70 is housed within an enclosure that can be located near the user &# 39 ; s dvd player 10 and television 20 . a voice pick - up element 32 is situated on an outer surface of a wireless microphone 13 in a location where it can receive sound waves corresponding to the user &# 39 ; s voice . the voice pick - up element converts the sound waves into an electrical signal that is connected to an amplifier and modulator 11 that amplifies the user &# 39 ; s voice and modulates the audio signal onto a wireless signal ( e . g ., radio frequency or infrared ), emitting the wireless signal on an external antenna 9 or ir transducer ( not shown ). as discussed previously , any known method of modulation can be used to wirelessly send the user &# 39 ; s voice ( audio ) to the base station karaoke device 70 . the wireless signal is picked up by a matching antenna ( or ir transducer ) 7 at the base station karaoke device 70 and demodulated by a demodulator 5 producing an electrical audio signal similar to the user &# 39 ; s voice . this electrical signal is amplified by an amplifier 38 with volume control 39 to a level compatible with the audio outputs 12 / 14 from the dvd player 10 . in the preferred embodiment , the amplifier &# 39 ; s output ( volume ) is adjusted by a multi - position switch connected to a resistor ladder . in other embodiments , the amplifier &# 39 ; s output is adjusted with a potentiometer or a digital potentiometer having a volume - up and a volume - down push button switch . for most dvd players , the audio output level is usually around 1 volt , peak - to - peak . the audio output signal from the adjustable amplifier 38 interfaces to a selector switch 46 and a sound processor 40 . the sound processor 40 enhances the user &# 39 ; s voice by adding , for example , echo . the selector switch 46 lets the user select either audio from the voice pick - up element 32 or from the sound processor 40 . in some embodiments , the selector switch is integrated into an on / off power switch ( not shown ) having three positions such as off , on and on / echo . the audio output from the selector switch is mixed with the left input by amplifier 36 and with the right input by amplifier 34 . the outputs of the amplifiers 34 / 36 pass to another selector switch 42 that selects to either pass the left and right audio from the dvd player 10 directly to the outputs or pass the mixed audio to the outputs . the outputs of the base station karaoke device 70 pass on cables 22 / 24 to the television 20 . again , it is preferred to have rca phono jacks on the end of the cables 22 / 24 for compatibility with most televisions . referring to fig4 , a schematic diagram of a system of a first embodiment of the present invention is shown . in this exemplary design , the voice pick - up element or microphone 32 is connected to an amplifier 38 that amplifies the user &# 39 ; s voice to a level compatible with the audio outputs 12 / 14 from the dvd player 10 . in this exemplary design , the amplifier &# 39 ; s 38 output is adjusted by a multi - position switch k 1 39 connected to a resistor ladder ( r 7 , r 8 , r 9 , r 23 , r 39 ). the audio output signal from the amplifier 38 interfaces to a selector switch ( k 2 ) and a sound processor 40 . the sound processor 40 enhances the user &# 39 ; s voice by adding echo processing . the selector switch ( k 2 c ) lets the user select either audio directly from the amplifier 38 ( e . g ., the voice from the microphone 32 ) or the processed audio from the sound processor 40 . in this exemplary design , the selector switch is integrated into an on / off power ( k 2 a ) switch having three positions : off , on and on / echo . the audio output from the selector switch is mixed with the left input 12 by amplifier 36 and with the right input by amplifier 34 . the outputs of the amplifiers 34 / 36 pass to another selector switch ( k 2 b and k 2 d ) that selects to either pass the left and right audio from the left and right inputs 12 / 14 directly to the outputs 22 / 24 or pass the mixed audio to the outputs 22 / 24 . equivalent elements can be substituted for the ones set forth above such that they perform in substantially the same manner in substantially the same way for achieving substantially the same result . it is believed that the system and method of the present invention and many of its attendant advantages will be understood by the foregoing description . it is also believed that it will be apparent that various changes may be made in the form , construction and arrangement of the components thereof without departing from the scope and spirit of the invention or without sacrificing all of its material advantages . the form herein before described being merely exemplary and explanatory embodiment thereof . it is the intention of the following claims to encompass and include such changes .