Brief introduction to Red Apple MP3 audio- sound recorder software Red Apple MP3 audio- sound recorder software possesses multi-function. By using it, both the inside and outside voices of the computer can be recorded (including voice input by microphone, Line in, or the voice played by internet or other software). For example, to record the content of internet on-line talking or chat, internet conference and then safe the content in hard disk for ever; more over, both the voice played by other software and the our voice can be recorded at the same time, then the function of Kara OK is realized. Its main functions are given as below: 1. support to save the recorded content in the formats like MP3 WAV VOX G726 OggVorBis; 2. after finishing recording, the recorded content can be played directly by this software, support to play several audio-format including MP3 WAV MP2 OGG WMA VOX; 3. Fixed-time recording. By using this function, the software could get start to record at pre-set time by the users, at certain time everyday or within a period of one day. The name of the recorded file can be automatically created or created by the user. Moreover, the software possesses the function of memory, even after re-start of the computer or the software, all the recording tasks still continue. 4. Support PC and most of the high or middle-grade Sound Card, support microphone, CD, Line in, selection of digital input line, display the signal of the audio at real-time. The audio coding is clear, suitable for the recording of teaching, conference, and singing. It can be also used for digitalization of magnetic tape and recording of broadcast. 5. humanized layout, easy and convenient for operation. The users only need to select the source of sound for the recording, catalogue of saving, name of the recorded file, format of the file. Then the recording can be started. There is no complicated system setup.