1. Cumulative Project: LabVIEW and DAQ
Evaluate your understanding of LabVIEW software and the basics of DAQ hardware. This project is
recommended after you complete ALL of the modules for LabVIEW Basics and LabVIEW Tasks.
Project Goal
Use NI LabVIEW software and the NI myDAQ device to create an audio equalizer. This needs to separate the
incoming signal into three frequency bands for bass, midtone, and treble. It also needs to allow for attenuation of
each band independently as well as overall volume control. You should then display the frequency spectrum plot
on the front panel and play the audio signal out to headphones or speakers. Keep in mind how a mixing table for
an equalizer looks when designing the front panel. This challenges you to combine all of the LabVIEW skills you
have learned thus far to complete a project that accomplishes a task with the [/mydaq|NI myDAQ device].
Required Hardware
NI myDAQ device
Computer speakers or headphones
3.5 mm audio cable
Things to Consider
■■ You can use the VI snippets solution to the exercise from the signal processing module, but it is good
practice to start from scratch.
■■ Use the audio input and output terminal of the NI myDAQ device.
■■ What are the frequency bands you should use for bass, midtone, and treble?
■■ What should the sampling rate be? What is the audible frequency range of the human ear?
■■ Add all of the frequency band signals back together before taking the FFT and outputting to the speakers
or headphones.
■■ Can you add any images to the front panel to help clarify the functionality?
Here is an example of what the front panel might look like:
ni.com/students/learnlabview

2. Exercise Solution (Don’t Cheat!)
Extra Credit
Typically, the vocals of a song are split evenly on the left and right channels of an audio signal. Can you think of
a way to remove the vocals from a song? Can you use this to make a karaoke machine?
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ni.com/students/learnlabview