An excellent multimedia courseware, in addition to clear image images and a variety of vivid animated images and text descriptions, but also often have to add sound effects in the courseware, so that the entire multimedia environment is more dynamic, so that people have a sense of immersion. Such as recording narration; will be played in the tape recorder music, English tutorials and other waveform files saved; will be in the game of music or download the MP3 and other music saved on the hard disk; or will be CD audio or VCD disks in the accompanying audio intercepted down and so on. For different sound sources, we collect different methods, this paper intends to multimedia courseware production process sound acquisition technology to talk about some of their own methods. First, multimedia courseware in the sound acquisition of hardware equipment required usually a complete computer music system mainly consists of the following equipment: computer, computer music interface, sound source, mixer, power amplifiers, tape recorders, microphone front (preferably capacitor microphone), etc., so that the production of multimedia courseware to have a pleasing, melodious sound. Computer sound card wiring straight up and down (vertical chassis), respectively, for the sound output, line input, microphone front input. Second, multimedia courseware in the collection of sound Windows operating system provides a "tape recorder" program and daily life in the use of tape recorders and outside is basically the same. Recorder provides a simple sound editing and processing functions. Users can copy sounds, delete segments, insert sounds, mix sounds, change the playback speed, add reverberation, invert sounds, and change the volume, etc. The sounds captured by Windows Recorder are input to the computer in the form of waveform sounds (in WAV format), and the recording time is only 1 minute. www.hdfinf.com Medical Classifieds If the recorded sound exceeds 1 minute, the recording time will be longer than 1 minute. Recorded sound more than 1 minute, you have to re-press the record button, but if the speed is not skillful, between 60 and 61 seconds to connect the sound is not ideal.1, using Windows Recorder to capture the sound of the simplest sound capture is in the multimedia computer and then add a microphone, if you want to capture a more pleasing to the ear, sound to be that kind of equipment, in a Windows environment Recording, the steps are as follows: (1) Click the "Start" button on the Windows desktop, select "Programs" ?ú "Entertainment" ?ú "Sound Recorder". "Recorder", open the "Recorder" program. (2) in the start of the "Sound - Recorder" dialog box, to the microphone front or play music, click the Record button, you can start recording. (3) Click the Stop button, recording is complete. (4) Click the Play button to playback, listen to the recording effect, if not satisfied, you can re-record. (5) recording satisfaction, open the "File" menu, select "Save As" command, the recorded sound files saved in the appropriate folder, this time the save file for the WAV format. 2, the use of sound editing software Cooledit Pro2.0 capture sound Cooledit Pro2.0 is a two-track digital audio editing software, including a full set of effects and tools to deal with audio material, such as such as mixing consoles, equalizers, etc., on the audio material editing, recording and synthesizer effect is very good. Its interface is shown in Figure (c): the preparation work before recording the same as when using a tape recorder to record. (1) Open Cooledit Pro2.0 software. (2) Play the music and click the red "Record" button to start recording. (3) Click the "Pause Recording" button to pause the recording, then you can see the recorded sound waveform in the waveform window. If you want to continue recording, click "Record" button again. (4) Click the "Play" button to listen to the recorded effect. (5) Click the "Save" command in the "File" menu to save the sound file. Note: Recording with a microphone can be affected by environmental noise, so you should record in a quiet environment. In addition, Cooledit Pro2.0 software can include WAV, WMA, RM, AVI and other sound format files for editing. Third, the sound acquisition after editing technology 1, mixed sound files in the multimedia development process, we often hope that the recorder is playing the news, soundtrack poems, tapes in the English language listening training courses such as digital audio format into the computer, and then its mixed editing. For example, mixing a narrated file with a music file can produce special effects. In the playback, then you can hear in the background of the end of the music in advance, the narration immediately after the beginning of this method is not affected by the environmental noise, but the disadvantage is that the Windows recorder such a mix can only be for the WAV file, a file immediately after another file. (1) First open a sound file. (2) Use the "Play" and "Stop" buttons to locate where you want to mix the sound file. (3) Select the "Mix with File" command from the "Edit" menu. (4) In the File dialog box, enter the name of another file you want to mix in. (5) Press the "OK" button to complete the mix. 2, delete a part of the sound file in the sound file has been collected, if you are not satisfied with a section of the sound can be deleted. The operation is as follows: (1) open the sound file to be deleted. (2) Use the "Play" and "Stop" buttons to locate the position to be deleted. (3) From the "Edit" menu, select the "Delete Content Before Current Location" command, or select the "Delete Content After Current Location" command. (4) Confirm whether to delete or not. 3, get the sound material in the CD-ROM using the "Super Audio Unlocker" in the "Super Unlocker 2000 +" can be used to intercept the CD-ROM and VCD discs and MP3 discs in the audio clips. The interface of these two players is the same, and the method of using them is basically the same. The steps to intercept audio information are as follows: (1) First play the CD or MP3 audio file. The method is: Click "Start" → "Programs" → "Haojie Super Explorer 2000", select "Audio Explorer" in the pop-up menu. " command in the pop-up menu, a dialog box will appear. (2) Open the "File" work menu, select the CD-ROM to be played or MP3 files and other audio sources, the player begins to play. (3) When the playback needs to be intercepted to the beginning of the position, click the "Pause" button. (4) open the "Control" menu, select "Play and Record", the pop-up "Save Sound Waveform File" dialog box.
The "Save Sound Waveform File" dialog box will pop up.