Other Audio Tricks


You can do several other small tricks with your source audio to assist the encoder in doing the job more efficiently and to ensure that the listener has a positive experience.

One of the first (and mandatory) processes to perform on a digital file is to remove what is called DC offset. DC offset occurs as low frequency inaudible noise resulting from equipment grounding problems. If present, DC offset can skew the results of subsequent digital edits. Use your waveform editor's DC offset removal function immediately after recording a digital audio file.

When working with audio segments for on-demand previewing scenarios, use your waveform editor to place a 3 5 second fade-in and fade-out at the beginning and the end.

Use your waveform editor on your on-demand source audio files to change the number of channels (stereo to mono) or to convert (lower) the sample rate. This is another example of taking some of the decision-making process out of the hands of the encoder. Chances are good that the algorithm that performs these functions contained within your commercial waveform editor is of a higher quality (and certainly no worse) than what's used in an encoding tool. It might take some research and digging in your encoder's documentation, but you can find out the sample rate used by your encoder based on your bit rate choice. Then you can resample your source audio to that rate prior to encoding.



Streaming Audio. The FezGuys' Guide
Streaming Audio: The FezGuys Guide
ISBN: B000H2N1T8
EAN: N/A
Year: 2001
Pages: 119

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