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Recording and Playback
entry for that file. Using dx_playf() is more convenient for a single file playback because you do
not have to set up a DX_IOTT structure for the one file and the application does not need to open
the file. dx_recf() provides the same single file convenience for the dx_rec( ) function.
For a complete list of I/O convenience functions and function reference information, see the Voice
API Library Reference.
8.5 Voice Encoding Methods
A digitized audio recording is characterized by several parameters as follows:
•the number of samples per second, or sampling rate
•the number of bits used to store a sample, or resolution
•the rate at which data is recorded or played
There are many encoding and storage schemes available for digitized voice. The voice encoding
methods or data formats supported on DM3 boards are listed in Table9.