Interactive Time-Varying Digital Filter in LabVIEW 1.2 2007/09/28 10:14:36 GMT-5 2008/03/18 09:42:14.379 GMT-5 Ed Doering doering@rose-hulman.edu Ed Doering doering@rose-hulman.edu Erik B Luther erik.luther@ni.com Sam D. Shearman sam.shearman@ni.com click noise filter state interactive parameter control LabVIEW time-varying digital filter A time-varying digital filter can easily be implemented in LabVIEW, and this module demonstrates the complete process necessary to develop a digital filter that operates in real-time and responds to parameter changes from the front panel controls. An audio demonstration of the finished result includes discussion of practical issues such as eliminating click noise in the output signal. This module refers to LabVIEW, a software development environment that features a graphical programming language. Please see the LabVIEW QuickStart Guide module for tutorials and documentation that will help you: • Apply LabVIEW to Audio Signal Processing • Get started with LabVIEW • Obtain a fully-functional evaluation edition of LabVIEW A time-varying digital filter can easily be implemented in LabVIEW. The screencast video of walks through the complete process to develop a digital filter that operates in real-time and responds to parameter changes from the front panel controls. The video includes an audio demonstration of the finished result and discusses practical issues such as eliminating clicks in the output signal. Download the source code for the finished VI: filter_rt.vi. Refer to TripleDisplay to install the front-panel indicator used to view the signal spectrum.

[video] Building an interactive real-time digital filter in LabVIEW