CN200986815Y

CN200986815Y - Footplate type MP3 player

Info

Publication number: CN200986815Y
Application number: CN 200620016364
Authority: CN
Inventors: 孟艳军
Original assignee: WEIKE ELECTRONIC SCIENCE-TECHNOLOGY DEVELOPMENT Co Ltd SHENZHEN
Current assignee: WEIKE ELECTRONIC SCIENCE-TECHNOLOGY DEVELOPMENT Co Ltd SHENZHEN
Priority date: 2006-12-08
Filing date: 2006-12-08
Publication date: 2007-12-05
Anticipated expiration: 2016-12-08

Abstract

The utility model relates to a pedal MP3 player that comprises a microprocessor and a peripheral circuit except a MP3 playing module. The peripheral circuit comprises an input interface circuit, a sound box simulator, a fader unit, an adder, an output interface circuit, a press button and a display screen; the output of the sound box simulator and the right track output in MP3 are connected with the adder by the fader unit. The press button, the display screen, the adder, the sound box simulator are connected with the microprocessor; the microprocessor controls the output of the adder, the display content of the screen and playing module of MP3 player; the output interface of the signal is connected with the adder. The biggest advantage of the utility model is that the utility model has functions of both MP3 and guitar effect card.

Description

Pedal MP3 player

Technical field

The utility model relates to a kind of MP3 player, relates to a kind of pedal MP3 player that can be used as the guitar effect device specifically.

Background technology

Existing MP3 player has advantages such as volume is little, capacity is big, file processing is convenient, music sources is many, easy to carry, but its present function can only be play mp3 file and listen to for domestic consumer, lack function, can not satisfy musicians' requirement in the musical performance field.

One, common MP3 player can only be linked into audio amplifier with its signal from the earphone output port, the public address set on sound console or the stage, and public address equipment can not reach musician's requirement to the different sound qualities that can feasible be play of input standard of signal.

Its two, present common MP3 player need directly be controlled music and stops etc. with hand, and musician's both hands when performance need be controlled musical instrument, thereby makes the musician can't control in real time it in the performance process.

They are three years old; cooperate training through the teaching of use CD of regular meeting in the time of musician's exercise, this CD is accompaniment music to stereo two paths of signals one tunnel record, and one tunnel record is guitar sound; common MP3 can only play stereo, and can not play wherein any one passage separately.

In addition, the real-time of common MP3 player does not reach musician's requirement yet, more than these have all limited its use in the musical performance field.

Summary of the invention

Technical problem to be solved in the utility model is at above-mentioned technological deficiency, to provide a kind of pedal MP3 player.This MP3 player is easy to use with the guitar practitioner to be that purpose designs, and its custom according to the guitar practitioner has strengthened function, and the switching between each function can be controlled by pin and finishes.

The technical solution of the utility model is:

A kind of pedal MP3 player, comprise the MP3 playing module, it is characterized in that, also comprise a microprocessor and peripheral circuit, described peripheral circuit comprises instrument signal input interface circuit, sound case simulator, fader, totalizer, signal output interface circuit, button and display screen; Wherein, the output signal of sound case simulator and the output signal of MP3 playing module are connected with totalizer by fader separately, export behind the totalizer audio mixing; Button, display screen, totalizer, sound case simulator link to each other with microprocessor, and microprocessor is according to output, the displaying contents of display screen and every function of MP3 playing module of the action control totalizer of button; Signal output interface circuit links to each other with totalizer.

Also comprise an effect process module before the described sound case simulator, be used for the instrument signal of input is carried out effect process.

Described sound case simulator is a low-pass filter, but the frequency response characteristics of analog instruments audio amplifier itself, and its access and disconnection are controlled by microprocessor.

Described fader is the adjustable carbon-film potentiometer of knob, is used for the input ratio of control signal.

The utility model is finished the function of control interface portion in the decoding chip of common MP3 player by independent external microprocessor, the decoding chip of MP3 player only is responsible for decoding, has solved the real-time in playing; Specially designed audio frequency apparatus output circuit cooperates the volume control knob of providing for oneself can satisfy normal domestic equipment, and professional equipment and earphone are to the various requirement of signal; In use only need trample and just can be done in real time such as playing, suspend, get back to exercises such as starting position, next song, musician's both hands are freed pedal; Two ports of output terminal can use separately also and can be used, use the mixed output signal port separately, can be directly will export behind musician's guitar signal and the accompaniment music audio mixing, use MP3 output port output MP3 signal separately, if use two ports simultaneously, the mixed signal port will remove the MP3 signal automatically, only export the guitar signal, the MP3 signal enters tuning device or public address equipment like this, and audio signal then connects amp separately; Have switching right and left passage or stereosonic function.The utility model inside has mixer circuit, can realize that musician's performance is connected with the seamless of MP3 music.The characteristics of the utility model maximum are exactly the function that had both had MP3, have the function of guitar effect device again.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model.

Embodiment

Describe organization plan of the present utility model and principle of work with reference to the accompanying drawings in detail: as shown in Figure 1, the musical instrument input interface is divided into a left side, right two sound channels, import outside instrument signal, because the output impedance of some instrument signal is than higher, so doing first-level buffer, amplifies input signal after the effect process module passes to case simulator, the sound case simulator here is a low-pass filter, sound case simulator and MP3 playing module are exported corresponding signal to totalizer according to microprocessor control signal and fader separately, totalizer is again according to the control command of the microprocessor left and right sides channel input signal with musical instrument, the left and right sides passage output signal of MP3 is done hybrid processing, the mode of mixing is controlled by microprocessor, the convenient different use occasion of always total following 6 kinds of signal combination modes:

1	Stereo	Two-way musical instrument input (left and right acoustic channels) mixes with the left and right acoustic channels of MP3 respectively
1	Stereo		2	L channel	MP3 only exports left channel signals and mixes with two-way musical instrument input (left and right acoustic channels)
3	R channel	MP3 only exports right-channel signals and mixes with two-way musical instrument input (left and right acoustic channels)	2	L channel
3	R channel		4	L channel+R channel	The addition of MP3 left and right sound track signals mixes with two-way musical instrument input (left and right acoustic channels)
5	L channel-R channel	The MP3 left and right sound track signals is subtracted each other with two-way musical instrument input (left and right acoustic channels) and is mixed	4	L channel+R channel
5	L channel-R channel		6	Quiet	The MP3 left and right acoustic channels is quiet

By the output of mixed signal output interface, use after signal is mixed, also be provided with an independent MP3 output interface in addition for peripherals, its output MP3 signal, the utility model also can be used as common MP3 player use like this.

Button is realized various functions as external control by microprocessor, always have three buttons in the present embodiment: pedal button, SELECT button and LOOP button, these three buttons all are multiplexing, wherein the pedal button is that pin is stepped on, and two other button is the conventional push button that is positioned on the panel.The pedal button is by a metallic pedal control, and solid and stable, under different patterns, button has different functions.After powering on, the utility model directly enters exercise mode, under exercise mode, green light in the pilot lamp is bright, and individual palpation pedal melody is play, and presses the pedal melody once more and suspends, two pedals are got back to the melody beginning, press SELECT selected songs forward, press the LOOP key and select A/B section loop play, length can select the corresponding pilot lamp of sound channel to light by 2 seconds SELECT, length entered the performance pattern in 2 seconds by pedal, and red light is bright; Under the performance pattern, individual palpation pedal melody is play, and two pedals song that advances press SELECT selected songs forward, presses the LOOP review, grows and opens the audio amplifier analog functuion in 2 seconds by the LOOP button.The net result of all above various controls all shows that by display screen the user can learn current pattern of living in and selected function by display screen.

Claims

1, a kind of pedal MP3 player, comprise the MP3 playing module, it is characterized in that, also comprise a microprocessor and peripheral circuit, described peripheral circuit comprises instrument signal input interface circuit, sound case simulator, fader, totalizer, signal output interface circuit, button and display screen; Wherein, the output signal of sound case simulator and the output signal of MP3 playing module are connected with totalizer by fader separately, export behind the totalizer audio mixing; Button, display screen, totalizer, sound case simulator link to each other with microprocessor, and microprocessor is according to output, the displaying contents of display screen and every function of MP3 playing module of the action control totalizer of button; Signal output interface circuit links to each other with totalizer.

2, pedal MP3 player as claimed in claim 1 is characterized in that, also comprises an effect process module before the described sound case simulator.

3, pedal MP3 player as claimed in claim 1 is characterized in that, described sound case simulator is a low-pass filter, is used for the frequency response characteristics of analog instruments audio amplifier itself, and its access and disconnection are controlled by microprocessor.

4, pedal MP3 player as claimed in claim 1 is characterized in that, described fader is the adjustable carbon-film potentiometer of knob, is used for the input ratio of control signal.