Main Content


(Not recommended) Prepare session for operation

This session object function is not recommended. Use DataAcquisition object functions instead. See Compatibility Considerations.



prepare(s) configures and allocates hardware resources for the session s and reduces the latency of startBackground and startForeground functions. There must be at least one channel in the session before you can call this function. Use of this function is optional; it is automatically called as needed.


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Create a session with one channel, and prepare it for operation.

s = daq.createSession('directsound');
ch = addAudioInputChannel(s,'Audio1',1);

Input Arguments

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Data acquisition session, specified as a session object. Create the session object using daq.createSession. Use the data acquisition session for acquisition and generation operations. Create one session per vendor and use that vendor session to perform all data acquisition operations.

Version History

Introduced in R2010b

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R2020a: session object interface is not recommended

Use of this function with a session object is not recommended. To access a data acquisition device, use a DataAcquisition object with its functions and properties instead.

For more information about using the recommended functionality, see Transition Your Code from Session to DataAcquisition Interface.