MATLAB: Data acquisition (Analog Input)

audiodata acquisitionsound

Anyone got idea what wrong with this coding?

%%Step 1: Create an analog input object to communicate with data acquisition device
% In this case, a Windows sound card is used ('winsound').
ai = analoginput('winsound');
addchannel(ai,1);

Here is the error :

??? Undefined function or method 'analoginput' for input arguments of type 'char'.
Error in ==> sound_acquisition at 15
ai = analoginput('winsound');

Is that my matlab missing of data acquisition toolbox?

Thanks in advance!

Best Answer

Probably yes. Type ver in command window. It displays info about your Matlab products.

ver daq

Related Solutions

MATLAB: Does the Image Acquisition Toolbox support the USB or FireWire (IEEE-1394) camera

The Image Acquisition Toolbox supports a broad range of imaging hardware including frame grabbers and Windows video capture devices. For a complete list of hardware supported by the Image Acquisition Toolbox, visit the supported hardware page, found by navigating to:

http://www.mathworks.com/products/imaq/

and clicking on "Supported Hardware".

In addition to supporting various frame grabber manufacturers, the toolbox supports FireWire digital cameras that support the IIDC 1394-based Digital Camera Specification (DCAM), as well as generic Windows video hardware like USB cameras.

1) The toolbox supports connections to IEEE 1394 (FireWire) DCAM-compliant devices using the Carnegie Mellon University (CMU) DCAM driver.

To test your FireWire camera for compatibility with the toolbox, download the CMU 1394 Digital Camera driver from the CMU Web site

http://www-2.cs.cmu.edu/~iwan/1394

and run their demo application (1394CameraDemo.exe).

For additional information on DCAM support, visit the Image Acquisition Toolbox supported hardware page listed above.

2) Generic Windows video capture devices are required to be DirectX (DirectShow) compatible for them to work with the Image Acquisition Toolbox. In order for a device to be DirectX compatible, it must provide a WDM (Windows Driver Model) or VFW (Video For Windows) driver.

You can determine if your device is DirectX compatible by running Microsoft's NetMeeting application, or by running the Microsoft image capture application, AMCap.exe.

If you are able to successfully operate your device with NetMeeting or the above utility without encountering any errors, the video capture device is expected to work with the toolbox.

For additional information on generic Windows video hardware support, visit the Image Acquisition Toolbox supported hardware page listed above.

MATLAB: How to synchronize audio and video data acquired from a device using Image Aquisition Toolbox 1.8 (R14SP2) and Data Acquisition Toolbox 2.6 (R14SP2)

The Image Acquisition Toolbox can be used to sample video and the Data Acquisition Toolbox can be used to sample audio data. Synchronizing audio and video data acquired from a single device is possible only if the device supports hardware triggering.

Both the Data Acquisition analog input object and the Image Acquisition video input object would need to be configured for a hardware trigger in order to have the acquired data synchronized.

To determine if an analog input object supports hardware triggering, call the SET command to query the object's TriggerType property:

set(ai,'TriggerType')

where ai is the analog input object created using the Data Acquisition Toolbox. This command returns the various triggering options available for the device.

In the Image Acquisition Toolbox, you must use the TRIGGERINFO function to determine all the valid TriggerType, TriggerSource and TriggerCondition configurations of a video input object, specifying the video input object as an argument:

config = triggerinfo(vid);

To set the values of the TriggerType, TriggerSource, and TriggerCondition properties, use the TRIGGERCONFIG function to specify the value of the property as an argument to the function. For example, the following code sets the values of these properties for a hardware trigger:

triggerconfig(vid,'hardware','risingEdge','TTL')

Best Answer

Related Solutions

MATLAB: Does the Image Acquisition Toolbox support the USB or FireWire (IEEE-1394) camera

MATLAB: How to synchronize audio and video data acquired from a device using Image Aquisition Toolbox 1.8 (R14SP2) and Data Acquisition Toolbox 2.6 (R14SP2)

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