An excellent multimedia courseware, in addition to clear images, vivid animation pictures and text descriptions, often adds sound effects to the courseware, which makes the whole multimedia environment more dynamic and makes people feel immersive. Such as recording commentary; Save waveform files such as music and English courses played in the tape recorder; Save the music in the game or downloaded MP3 music on the hard disk; Or cut off the sound in CD audio or VCD DVD and so on. For different sound sources, our methods of collecting sound are different. This paper intends to talk about some methods of collecting sound in the process of making multimedia courseware. 1. Hardware equipment required for sound collection in multimedia courseware Usually, a complete computer music system mainly consists of the following equipment: computer, computer music interface, sound source, mixer, power amplifier, tape recorder, microphone (preferably condenser microphone) and so on. , so that the multimedia courseware made in this way can have a pleasant sound. Computer sound cards are wired from top to bottom (vertical chassis), including sound output, line input and microphone input. Second, the collection of sound in multimedia courseware The "recorder" program provided by Windows operating system is basically the same as the recorder in daily life. The recorder provides simple sound editing and processing functions. Users can copy sounds, delete clips, insert sounds, mix sounds, change the playback speed, add reverberation, reverse sounds and change the volume. The sound collected by Windows recorder is input into the computer in the form of waveform sound (WAV format), and the recording time is only 1 minute. If the recorded sound of www.hdfinf.com medical classification information exceeds 1 min, you must press the record button again, but if the speed is not skilled, the sound at the junction between 60 and 6 1 sec will be ignored. 1. The easiest way to collect sound with a Windows recorder is to add a microphone to the multimedia computer. If you want to collect more pleasant sounds, you need such a device. To record in the Windows environment, the operating steps are as follows: (1) Click the Start button on the Windows desktop and select Programs → Entertainment → Video Recorder. (2) In the started "Recording Pen" dialog box, facing Feng or the music being played, click the recording button to start recording. (3) Click the Stop button to end the recording. (4) Click the play button to play back and listen to the recording effect. If you are not satisfied, you can re-record. (5) When the recording is satisfactory, open the file menu and select the Save As command to save the recording file in the corresponding folder. At this point, the saved file is in WAV format. 2. Using audio editing software Cooledit Pro2.0 to collect sound Cooledit Pro2.0 is a dual-channel digital audio editing software, including a set of effects and tools for processing audio materials, such as mixer and equalizer, which has a good effect on editing, recording and synthesizer of audio materials. The interface is shown in Figure 3: The preparation before recording is the same as when recording with a tape recorder. (1) open the Cooledit Pro2.0 software. (2) Play music and click the red "Record" button to start recording. (3) Click the "Pause Recording" button to pause the recording, and you can see the recorded sound waveform in the waveform window. If you want to continue recording, you can click the "Record" button again. (4) Click the "Play" button to listen to the recorded effect. (5) Click "Save" in the "File" menu to save the sound file. Note: Recording with a microphone will be affected by environmental noise, so recording should be carried out in a quiet environment. In addition, Cooledit Pro2.0 software can edit sound format files including WAV, WMA, RM, AVI, etc. Third, the editing technology after sound collection 1, mixing files In the process of multimedia development, we often want to input the news, score poems and English listening training courses on tape into the computer in the form of digital audio, and then mix and edit them. For example, mixing commentary files with music files can produce special effects. When playing, you can hear the commentary start immediately before the background music ends. This method is not affected by environmental noise, but the disadvantage is that the mixing of Windows recorder can only be aimed at WAV files, one file after another. (1) Open the sound file first. (2) Use the "Play" and "Stop" buttons to find the location where you want to mix sound files. (3) Select the "Mix with File" command from the "Edit" menu. (4) Enter another file name you want to mix in the file dialog box. (5) Press the "OK" button to finish mixing. 2. Delete a part of the sound file. In the collected sound files, if you are dissatisfied with a sound, you can delete it. The operation method is as follows: (1) Open the sound file to be deleted. (2) Use the "Play" and "Stop" buttons to locate the location to be deleted. (3) Select the command "Delete the content before the current position" from the edit menu, or select the command "Delete the content after the current position". (4) Confirm whether to delete. 3. Get the sound data from the CD. You can intercept audio clips from CD-ROMs, VCD-ROM and MP3-ROM by using "Super Audio Decoder" in "Super Decoder 2000+". The interfaces of these two players are the same, and the usage methods are basically the same. The operation steps of intercepting audio information are as follows: (1) First, play the CD or MP3 audio file. The method is as follows: Click Start → Program → Hero Super Jieba 2000, and select the audio Jieba command in the pop-up menu to pop up the dialog box. (2) Open the "File" work menu, select the audio source such as CD or MP3 file to be played, and the player will start playing. (3) Click the "Pause" button when playing to the starting position to be intercepted. (4) Open the "Control" menu and select "Play and Record" to pop up the "Save Sound Waveform File" dialog box.