I am completely new to Audacity. I just recently downloaded it. I have taken multiple recordings where I am by myself. Is there a way to determine if there are subliminal messages on any of these recordings using Audacity. Could I somehow isolate the noise and listen to subliminal messages that may be embedded in the recording? Thanks you!
Any particular reason why you think there might be subliminal messages?
“Subliminal” just means “below the threshold of sensation”, so that covers anything that you can’t hear, see, touch. smell or taste.
As Audacity is an audio program I presume that you are interested in subliminal audio. That could be sound that is too high, too low or too quiet to hear. If it is too high, too low or too quiet to hear then it may be too high/low/quiet to record. Strictly speaking, KIIS FM is “subliminal”, as is every other radio and TV station. They carry messages (programs) that are encoded in “electromagnetic waves” that are beyond the visible spectrum.
Generally no. Unless there is some characteristic (such as pitch) that makes the subliminal audio different from the main audio. But if that were the case, you could probably hear the subliminal audio and it wouldn’t be subliminal.
If there is no “main audio” (and no noise) you can use the Amplify effect to bring-up the volume. But if the subliminal audio is drowned-out by some other audio, you’re never going to hear it.
For example, the stuff you see in TV shows or movies where they enhance audio to pull-out a conversation from crowd noise at a party… That’s just science fiction.
However, you should be able to remove subliminal audio by using noise reduction. Or by MP3 encoding, since MP3 works by throwing-away audio you can’t hear. Or downsampling to 8-bits will also throw-away “small details”.
You can generally isolate voices using Adobe Audition. It displays the sounds in waveform in an X, Y table format, where x is the time duration and y is the frequency. So you’ll see various amplitudes up the Y axis of the table of individual sounds, shaded by amplitude (harder to see color means very faint volume). You can crop various frequencies out and generally isolate the messages.
Fine, but that has nothing to do with the question being asked, and nothing to do with Audacity.
As in my reply to your similar post, Audacity is quite capable of manipulating frequency bands, so there is no need to suggest that users should switch to trial versions of expensive commercial software. This is the Audacity forum, so we should be discussing Audacity rather than commercial alternatives.
the stuff you see in TV shows or movies where they enhance audio to pull-out a conversation from crowd noise at a party… That’s just science fiction.
Which actually has a name. The “CSI Effect.” Turns out many jurors drive to the courthouse expecting the trial to be over in 53 minutes.
nothing to do with Audacity.
The main difference being that’s money-based software. You can switch the Audacity display to Spectrogram View (dropdown on the left) and get the colorful frequency/pitch stack versus program duration.