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# Understand Audio

To get the best results from IDOL Speech Server, it helps to understand the properties of audio. Most humans cannot detect subtle differences in audio quality. The human brain is excellent at understanding meaning and tends to ignore defects in audio if it can pick out the meaning. Because automatic speech processing technologies use statistical methods, varying attributes and imperfections in the audio alter the patterns computed in the analysis, which can lead to poor results. This can lead to complaints, such as “I can hear the speech well but the speech-to-text output has many errors”. The key to ensuring good results is to avoid imperfections and distortions in the audio.

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