This application aims to show visually the effects of filter frequency change on signal.It is provided with dynamic filter which can change its low and high frequencies by user mouse drag.
Digital Signal Processing by Li Tan
Oh, that is a good resource.
yeah, perhaps you should use LF (or HF) box to input exact and low (or high) frequencies
very nice work.
One suggestion: left limit of the bandpass filter (green dot) is trapped, and cannot be controlled with the mouse, if you want to move it towards lower frequencies.
Fixed icon bug
New features like cursors are introduced where user can see values of signal at any point.
Minimum bandwidth updated, edit boxes directly connected to filter output process
fixed problem of extreme frequencies selection by mouse