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Audio with SDL

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Hi -- I''m trying to synthesize music in realtime, using SDL for audio output (not SDL_mixer -- using callbacks to fill the sample buffer, etc). I''m having some problems. The callback just copies data from a buffer to the sample buffer every 10ms.. the main loop simply checks if theres less than 10ms of audio data ready, if there''s not it will generate some. However, there are overruns all the time, clicks and pops, and I''m not sure its the most efficient method. Can anyone help? Thanks

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