Set and get the actual bitrate of the sample which can be 8, 16, 24 or 32 bits.
With this tag sound.datatype finally supports handling of samples >8 bits.
This tag MUST be set for 16-, 24- or 32-bit sound data to get them (poorly) converted to 8-bit.
- NOTE:
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You must set this attribute *before* setting SDTA_SampleLength.
Default for this tag is 8. Applicability is (ISG).