Hi everybody
thank you for this nice website
May anyone help me with this?
I am trying to make a silent subliminal audio.
How can I make this instructions in Cool Edit Pro?
"Here the target signal is first band-pass filtered to contain only frequencies in a small band (100 to 3000 Hz, for speech). Then it is upsampled by a factor 4 to avoid aliasing, and frequency modulated with a carrier of 14500 Hz. Finally the signal is filtered by a sharp anti-aliasing filter at 20 kHz and downsampled again to the original sampling rate. "
I really need to understand this. Thank you very much!
thank you for this nice website
May anyone help me with this?
I am trying to make a silent subliminal audio.
How can I make this instructions in Cool Edit Pro?
"Here the target signal is first band-pass filtered to contain only frequencies in a small band (100 to 3000 Hz, for speech). Then it is upsampled by a factor 4 to avoid aliasing, and frequency modulated with a carrier of 14500 Hz. Finally the signal is filtered by a sharp anti-aliasing filter at 20 kHz and downsampled again to the original sampling rate. "
I really need to understand this. Thank you very much!