MONO AUDIO TO SIMULATED STEREO
David Ruether
| I looked at various solutions for
converting mono sound to a simulated stereo sound, but I was not happy
with any until I tried one of my own. In a sound editing program, I laid out the mono sound on both left and right tracks and used an equalizer (after first reducing the tracks' overall volume levels about 3-4db to prevent clipping) to introduce opposite channel peaks and dips of 4db in the frequency response. With mono sound, try these values for the left track in db: 0, 0, +4, -4, +4, -4, +4, -4, 0, 0 -- and for the right track: 0, 0, -4, +4, -4, +4, -4, +4, 0, 0, for the approximate center frequencies of 50, 100, 200, 400, 800, 1600, 3200, 6400, 12000, and 24000cps (other center frequency sequences can be used with EQs with different numbers of bands and different center frequencies). I have found that the Canon HV20/30's AGC (automatic gain control) does not always prevent wave-form clipping distortion, and the method described above appears to reduce that distortion in the resulting waveforms. |
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