Sonic holography 4621223 178026586 2007-12-15T05:13:10Z Kindall 624973 /* Controversy */ remove redundancy {{rewrite}} {{Orphan|date=November 2006}} '''Sonic Holography''' is a proprietary audio filter design developed by [[Bob Carver]] and was used extensively in several [[preamplifier]] and [[receiver]] units built by Carver Corporation in the 1980s and 1990s. The goal of sonic holography is to remove distortions in [[Pitch (music)|pitch]] caused by the [[doppler effect]] while recording and playing back audio on a sound system. While an audio source is recorded by a [[microphone]], the membrane that picks up sound vibrations moves towards and away from the source. This results in a [[doppler shift]] that is preserved in the recording. When that recording is played through a [[Loudspeaker|speaker]], the cone vibrates back and forth in order to move air particles and create sound. This introduces a second doppler shift, especially when the same cone is producing multiple [[frequencies]] at the same time. Both instances of [[doppler distortion]] degrade the overall quality of the output. Sonic holography attempts to remove these distortions using a proprietary filter designed by [[Bob Carver]]. ==Controversy== Audio purists argue that in order to preserve fidelity, the audio signal should be captured at the highest quality possible and then should not be modified. Some listeners feel that Sonic Holography introduces artifacts into the sound recording while attempting to remove others. ==External links== * [http://www.carveraudio.com/ Carver Audio website] * [http://www.sunfire.com/ Sunfire website] * [http://www.audioasylum.com/audio/general/messages/14476.html/ Sonic Holography] *[http://www.soundclick.com/aceholiday Ace Holiday] Artist that re-creates 1960's easy listening genre with newly composed songs. Selected tracks produced with Sonic Holography. *[http://www.soundclick.com/util/streamm3u.m3u?id=5029668&q=hi Listen Here MP3] (free to public). [[Category:High end audio|Sonic Holography]]