Comments

Certainly there are all sorts of applications this could be useful which has little to do with covert or illegal activities. 1: The audio sound that reverberates inside the speakers cabinet can be stabilized creating a cleaner sounding speaker system. On a larger scale, concert halls can have this applied to pillars and other obstructions to minimize echoes. Basically any environment where sound quality is very important like a recording studio. 2: Large reflectors used in solar energy collection or in reflecting telescopes to minimize distortion due to minute imperfections. Bob Katayama www.technobrains.com

Here is one issue that was not addressed in this piece which I feel makes a considerable difference in the overall sound output. Vinyl record is an analog based sound source. CD is a digital based sound source. I would say someone listening to the vinyl record on a high end stereo system that takes the analog signal and directs it through an analog stereo system then the sound will be very good. If the vinyl turntable is connected to a digital amplifier that converts the signal from analog to digital and then back to analog to be listened to then some of the original audio quality will be lost. Someone listening to a CD on a high end digital system using optical cable connections would not experience the loss in audio quality thus get the best possible sound from the CD recording. If the portable CD player is connected through the headphone output to a stereo system then some audio quality is lost. Either way, there are methods that ensure that the original recorded sound is preserved as much as possible while listening to a vinyl record or CD. The average person would not take in to account that converting the original signal from analog to digital or digital to analog will cause some of the audio quality to be lost. Are vinyl records better over CD in audio reproduction? This is still up for debate. What I would like to say is if the original recording in mastered on to digital media, would it not make sense to create a copy also on a digital media like a CD to maintain the audio quality instead of converting this to an analog vinyl disk?