I recorded the silence at night at home, looking for any hidden sounds (voices).
So once the silence was recorded, I applied the effect to isolate vocals (default setting)
voices appeared as well as beats (3 to 4 beats per second) as well as a ROTATING SOUND
my question concerns the sound that rotates, is this sound the normal consequence of using the effect?
in other words, it comes from the software or is it simply a sound inaudible to the human ear but present in what is recorded?
If you perform the same process, is the spinning sound present?
Similar question about beats (these beats are detected by: Analyze–>Beat finder)
voices appeared as well as beats (3 to 4 beats per second) as well as a ROTATING SOUND
my question concerns the sound that rotates, is this sound the normal consequence of using the effect?
in other words, it comes from the software or is it simply a sound inaudible to the human ear but present in what is recorded?
No that’s not normal…
It’s not intended for recorded “silence” or “background noise” and I’d expect the results to be unpredictable.
The regular-old vocal remover works with stereo music recordings by subtracting left from right. Since the lead singer is usually in the “center” (equal in the left & right channels) the vocals can be subtracted-out. This removes [i}everything[/i] in the center, but there is an optional filter so you can keep the bass (which is usually centered).
The Vocal Isolation and Separation effect uses more advanced techniques so you can keep the center and throw-away the sounds that are different on the left & right.
Of course, to work “properly” you need a stereo recording (separate left & right channels). And it works best with a modern stereo studio-recordings where the tracks are artificially panned left, center, and right. A stereo recording made with 2 microphones won’t work very well and a mono recording won’t work at all. And even though it can sometimes “work perfectly” to completely remove (or isolate) the vocals when the vocals are identical and in-phase in both channels, the results are never “professional” because centered instruments will also be removed.
Looks like MySpace audio doesn’t work with Firefox or Chrome on Linux. Perhaps they are still using Flash (now blocked on Linux as Adobe Flash is insecure and obsolete).
I know that is not the reason for this effect but the point is that it works to make sound appear inaudible to the human ear.(with a simple recorder-2 micro)
The voice-like sounds are created by effects. “Data compression” and “FFT effects” (including “Noise Reduction”, “Echo cancellation” and others) commonly produce voice-like artifacts. The perception of voices in these kind of noises is called “Pareidolia”.
