(Running Audacity 2.0.1 on Windows XP)
Hello all, Newbie here
I’ve read a few historic threads from 2011 on the details of creating subliminals on Audacity, including using Nyquist for creating frequencies above human hearing ( https://forum.audacityteam.org/t/silent-subliminals-solved/20100/1) and the other post using the Lowery method https://forum.audacityteam.org/t/silent-subliminals-solved/20100/1 - having never used Nyquist before, some of it’s a bit confusing.
I’m interested in creating subliminals just below or on the threshold of hearing, many people suggest simply adjusting the amplitude by around -17 db. What are the benefits of using Nyquist over basic wave / amplification reduction (the Nyquist codes appear to adjust frequency rather than peak amplitude)??
It would be really helpful if someone with more knowledge in this area can also explain how I would edit the following Nyquist code (posted previously by steve) to one that would give a below hearing frequency message, along with what each parameter is used for?
(highpass8
(lowpass8
(mult
(lowpass8 (highpass8 s 300) 7000)
(hzosc 45000)
(hzosc 59500))
20000)
14000)
I also found when I tried to get this to work after resampling to 19000Hz, I got the error “Nyquist did not return audio”.
The Nyquist script appeared work without prior resampling.
Also what is the advantage of resampling beyond the default setting?
All help is most welcome! 