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| >Chapter 10. Audio</H1 |
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| ><DL |
| ><DT |
| ><B |
| >Table of Contents</B |
| ></DT |
| ><DT |
| ><A |
| HREF="sdlaudiospec.html" |
| >SDL_AudioSpec</A |
| > -- Audio Specification Structure</DT |
| ><DT |
| ><A |
| HREF="sdlopenaudio.html" |
| >SDL_OpenAudio</A |
| > -- Opens the audio device with the desired parameters.</DT |
| ><DT |
| ><A |
| HREF="sdlpauseaudio.html" |
| >SDL_PauseAudio</A |
| > -- Pauses and unpauses the audio callback processing</DT |
| ><DT |
| ><A |
| HREF="sdlgetaudiostatus.html" |
| >SDL_GetAudioStatus</A |
| > -- Get the current audio state</DT |
| ><DT |
| ><A |
| HREF="sdlloadwav.html" |
| >SDL_LoadWAV</A |
| > -- Load a WAVE file</DT |
| ><DT |
| ><A |
| HREF="sdlfreewav.html" |
| >SDL_FreeWAV</A |
| > -- Frees previously opened WAV data</DT |
| ><DT |
| ><A |
| HREF="sdlaudiocvt.html" |
| >SDL_AudioCVT</A |
| > -- Audio Conversion Structure</DT |
| ><DT |
| ><A |
| HREF="sdlbuildaudiocvt.html" |
| >SDL_BuildAudioCVT</A |
| > -- Initializes a SDL_AudioCVT structure for conversion</DT |
| ><DT |
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| HREF="sdlconvertaudio.html" |
| >SDL_ConvertAudio</A |
| > -- Convert audio data to a desired audio format.</DT |
| ><DT |
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| HREF="sdlmixaudio.html" |
| >SDL_MixAudio</A |
| > -- Mix audio data</DT |
| ><DT |
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| HREF="sdllockaudio.html" |
| >SDL_LockAudio</A |
| > -- Lock out the callback function</DT |
| ><DT |
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| HREF="sdlunlockaudio.html" |
| >SDL_UnlockAudio</A |
| > -- Unlock the callback function</DT |
| ><DT |
| ><A |
| HREF="sdlcloseaudio.html" |
| >SDL_CloseAudio</A |
| > -- Shuts down audio processing and closes the audio device.</DT |
| ></DL |
| ></DIV |
| ><P |
| >Sound on the computer is translated from waves that you hear into a series of |
| values, or samples, each representing the amplitude of the wave. When these |
| samples are sent in a stream to a sound card, an approximation of the original |
| wave can be recreated. The more bits used to represent the amplitude, and the |
| greater frequency these samples are gathered, the closer the approximated |
| sound is to the original, and the better the quality of sound.</P |
| ><P |
| >This library supports both 8 and 16 bit signed and unsigned sound samples, |
| at frequencies ranging from 11025 Hz to 44100 Hz, depending on the |
| underlying hardware. If the hardware doesn't support the desired audio |
| format or frequency, it can be emulated if desired (See |
| <A |
| HREF="sdlopenaudio.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_OpenAudio()</TT |
| ></A |
| >)</P |
| ><P |
| >A commonly supported audio format is 16 bits per sample at 22050 Hz.</P |
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