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Snd Read Wave File (PDA Module, Touch Panel Module)

LabVIEW 8.5 Touch Panel Module Help
August 2007

NI Part Number:
371944B-01

»View Product Info

Retrieves a wave file (.wav) specified in wave file path.

The information returned includes both waveform data and sound format data, which is necessary for configuring a sound device to play the waveform. This VI retrieves only uncompressed wave files.

Example

wave file path specifies the location of the wave file (.wav).
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the PDA Error Handler VI to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
mono 8-bit includes sound data if sound format specifies monaural 8-bit data. Otherwise, it is an empty array.
mono 16-bit includes sound data if sound format specifies monaural 16-bit data. Otherwise, it is an empty array.
wave file path out is the same value as wave file path.
sound format identifies if the sound operation is mono or stereo, its playing rate (speed), and whether it is set as 8- or 16-bit sound.
sound quality indicates whether the sound operation is mono or stereo.
rate indicates the sample rate in hertz for the sound input operation or the updated rate for the sound output operation. You can select 8000, 11025, 22050, or 44100.
bits per sample indicates whether the sound operation is set for 8 bits or 16 bits per sample.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.
stereo 16-bit contains sound data if sound format specifies stereo 16-bit data. Otherwise, it returns an empty array.
stereo 8-bit contains sound data if sound format specifies stereo 8-bit data. Otherwise, it returns an empty array.

Example

Refer to the Play Sound - Pocket PC.lvproj in the labview\examples\PDA\sound directory for an example of using the Snd Read Wave File VI.


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