Translates a byte position into time (seconds), based on a channel's format.
|handle||The channel handle... a HCHANNEL, HMUSIC, HSTREAM, or HRECORD. HSAMPLE handles may also be used.
|pos||The position to translate.
If successful, then the translated length is returned, else a negative value is returned. Use BASS_ErrorGetCode
to get the error code.
|BASS_ERROR_HANDLE||handle is not a valid channel.
The translation is based on the channel's initial sample rate, when it was created.