Revitalizing MIDI Drums
Many may rightly claim that the great advantage of sampled, electronic drums is that they don’t force you to use ‘realistic’ rhythmic patterns or drum sounds. Most dance music, for…

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About noise and distortion measurements
Probably, it will not be a great exaggeration to say that the main parameters that we pay attention to when choosing equipment are noise and distortion levels. Why? Perhaps -…

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Oboe
Oboe (from fr. Hautbois, literally “tall tree”, English, German and Italian. Oboe) is a woodwind musical instrument of the soprano register of the symphony orchestra, which is a conical tube…

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About reverb

In recent years, technologies in the field of creating spatio-temporal effects have improved significantly, and we can talk about significant progress in this area. We owe this progress to scientific research in the field of acoustics and psychoacoustics, the development of new methods for synthesizing sound space and new reverberation algorithms.

Reverb (from the Latin word re-verberatus, “re-strike”) is the process of continuing sounding after the end of a sound pulse or oscillation, due to reflections of sound waves from surfaces. Therefore, reverberation takes place only in enclosed spaces, although under special conditions some of its types can also occur in half-open space (for example, in a stadium, city square, narrow mountain gorge, etc.). We can justifiably classify as enclosed spaces such a natural formation as a cave – that’s where the reverb is so reverb!

Indoors, the listener receives not only a direct sound, but also the so-called. early reflections.
Early reflections are those that, on the way to the listener, are reflected only once from the walls of the room.

Subsequent “late” reflections are “reflections of reflections,” or “rereflections,” when a sound wave is repeatedly reflected from different walls before reaching the listener. The more such reflections, the more their spectrum changes due to the loss of high frequencies that lose energy faster than low ones. Late reflections are combined into one continuous smoothly fading after-sound (“reverb tail”)

About Reverb (Reverb in Music)
Indoor reflection structure
For practical measurement of the reverberation time, it was proposed to measure the time during which the level of the decaying (reverberating) signal decreases by 60 dB. This is parameter RT60, also called “reverberation time”. However, when measuring the RT60 reverberation time, the frequency characteristics of the reverberation sound are not taken into account.

There is one more parameter – diffuseness, or spectral unevenness. It determines the unevenness of the amplitude-frequency characteristic (AFC) of the reverberation in the frequency band of 1 Hz. The larger this parameter, that is, the more uneven the frequency response – the denser, richer the reverberation sound, and the less it is tinted. And, as you know, the tonal color of the reverb, that is, the presence in the echo of intonation certainty, is a significant lack of space, making it unsuitable for use for musical purposes.

In natural reverberation, the addition of many signals having a different delay occurs, so the number of peaks and dips in the resulting frequency response will increase. Due to the randomness of the process of adding peaks and dips, individual elements are approximated, become invisible to the hearing, and the “reverb tail” itself becomes dense and even.

It is the ability to most accurately recreate this process electronically that distinguishes the sound of high-quality devices from simpler and cheaper ones.

Reverb Development
About Reverb (Reverb in Music)
Reverb Room
It is known that the first artificial reverbs were echo cameras that appeared in the 30s. These were special rooms at recording studios, usually corridors in the basements. A loudspeaker was installed at one end of the room, and a microphone at the other. A signal was supplied to the loudspeaker, and the signal taken from the microphone was mixed into a direct one. Thus, the principle of parallel processing used in modern reverbs originates even from echo rooms.

About Reverb (Reverb in Music)
Scheme of the spring line delay: 1 – permanent magnet; 2 – an elastically fixed frame of insulated wire; 3 – spring; 4 – freely rotating frame of insulated wire
The first electromechanical reverb system was the spring reverb, which so far is still found in guitar combos. In some sense, its arrangement is similar to an echo room (an electromechanical transducer at one end, a mechanoelectric transducer at the other end), but a spring served as the medium of wave propagation instead of air. Due to the peculiarities of the propagation of oscillations in the spring (mainly longitudinal), the sound signal at the output of the mechanoelectric transducer is not much like the original, but in combination with a direct signal, the total sound really looks like a reverb.

Next came other electromechanical devices – sheet reverbs. Their reverb sound was more believable, but when giving a complex and high-level signal (for example, from several channels of the mixer), they gave noticeable distortion. And due to the cumbersome design, the use of sheet reverbs was limited.

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