I have several audio clips which have been repaired by Sound Cleaner, Adobe Audition and RX 4. Much to my dismay, there is a remaining “tunnel echo” (does it have a nomenclature, official name?) which sounds like the person is speaking though an empty tube of toilette paper (or aluminum oil).
We can place a robotic lab on Mars and we cannot get rid of that sound?
One of the problems of processing a sound clip is overdoing it. You know you went too far when you get that talking into a wine glass effect. If you get that, trash that clip, go back one step and recorrect the work this time with not so much processing.
I am mystified by this technology. During my EE studies, after doing my share of Fourier Transforms, I arrived to the conclusion "All one needs to do is apply the correct filter (low pass, high pass and bandpass). Little did I know…
A couple decades later, in which I have not done anything remotely closer (and thanks to the advanced in GUI applications), I have become fascinated with this specialty. Well, let’s go to the beef.
Find attached a sound clip:
(1) Before being processed by Sound Cleaner
(2) After being “repaired” (and yet, injured in a sense). A disturbing “tunnel echo” remains
Additionally, I included time & spectral waveforms.
I was beginning to suspect as much, as soon as I saw the time and frequency curves, before and after.
During my original post, I was judging only with my under-capable ear (let’s just say that musical talents were never a strong in any of my family members). In my naiveté I figured: “Sounds like an alias, a quick filter should take care of that!”.
We can clearly see that a big chunk of information is gone. Notice the big “bite” missing in the spectral curve!