The spectrum of the musical signal. Part 7. Scheme, description

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The spectrum of the musical signal. Part 7. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Speakers

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back to nature

So what, does not happen in the recording of frequencies worthy of the name subbass? No, it happens. Just not quite where we were looking. First of all, I suggest you agree that, taking into account the sound realities, the subwoofer in the car, strictly speaking, is not a "sub-", but simply a "woofer", that is, a low-frequency speaker designed to complement small-sized front acoustics in the low-frequency region . And a subwoofer in the true sense of the word is an attribute of a home theater, where it is entrusted with the task of reproducing sounds not of musical, but of natural and man-made origin. Here's an example for you. "Normal summer rain", or rather - a normal summer thunderstorm, neatly recorded by Alan Parsons for the studio Telarc. Its spectrum is lower.

Overture of 1812 with and without cannons. The artillery party makes this record unique in terms of infrasound content.

Sounds with such characteristics belong to nature and technology. Therefore, they appear, as a rule, in the context of the video sequence, that is, outside the typical car audio system. There are, however, a few, but very effective exceptions. Pyotr Ilyich Tchaikovsky, in a fit of inspiration and patriotism, entered a part for artillery into the score of the Overture of 1812. This is why this work is rarely performed in full orchestration, and most symphony orchestras do not provide for ammunition in the cost estimates. But when the "Overture" is performed, the frequencies appear noble. Here is the spectrum of one of the finest recordings of this piece in existence. Half of the laurels are by right - Peter Ilyich, and half - Telarc studios.

Until the eleventh minute, the range of instruments of a large, vigorously playing, but still ordinary symphony orchestra, is also ordinary. And when, at the 11th minute, cannons on black powder shy away (according to the score, there was no smokeless one under P.I.), an addition to the spectrum of infra-low frequencies that has a slightly equal amplitude appears.

This work is not often performed in full orchestration, and ammunition is not included in the cost estimate.

It is no coincidence that good recordings of the 1812 Overture are at the very top of the list of the most bass CDs compiled at the time in the acoustic laboratory of the University of Auckland. In the table on the back - the first 10 positions of this list.

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Literature

Magazine "Autosound" № 11 / 2000

Author: Andrey Elyutin; Publication: avtozvuk.com

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