Anonim

DIGITAL PROCESSORS

And who, for example, would come up with the idea to put this same chair next to the left speaker system? But inside the car, completely different laws apply …

LEFT SLOPE

No, if you have a right-hand drive “Japanese girl”, then the bias, of course, will be right … However, it’s clear what is being said - the driver sits not in the center of the cabin, but on the side, and therefore sticks to one of channels of the installed audio system, no matter how expensive it may be. Of course, you can listen, but the idea of ​​not only “hi-fi”, but even the usual “stereo” was killed on the spot. Orchestra musicians sit in strictly defined places, the sound engineer diligently builds the correct music scene when recording a phonogram, and as a result - “absence of presence”, wild phase distortions, overwhelming “advantage” of the left channel over the right, as a result - everything is bad. And do not twist the balance - the phase-frequency characteristic of this will only worsen. But neither the seats nor the speakers can be pushed back: nowhere! What do we do?

The solution, in general, suggests itself - it would be nice to organize the necessary time delay for the left channel. The right passenger will raise his eyebrows with displeasure, but we will deal with him later. Of course, the processor will help to delay information - this is a kind of professor in terms of signal processing.

What is required from a "microfessor"? By the way, in science it is called a digital sound processor (DSP - Digital Sound Processor). It’s a bit difficult to process an analog signal, frankly, but today you can create almost anything with zeros and ones, just like in a computer. Pleasure is not cheap - for example, the services of such an “academician” as “Status” from the Alpine company (Alpine F # 1 Status) will cost five to seven thousand dollars, or euros. Therefore, we will postpone the “interview” with the maestro until the next meeting, and today we will meet young “graduate students” whose help is incomparably cheaper. It will be about Alto Mobile products from Italy.

FROM STUDIO - TO THE SALON

Whether it is a revolution or not, let’s see, time will tell. The company "Alto", which previously specialized in professional studio sound, decided to try its hand at numerous "mobile phones" and solve all problems in one fell swoop. Oh well…

However, the thing is very interesting. Alto-Mobile is included between the head preamplifier and an external power amplifier. The input analog signal is converted to a "digit", the rest is a matter of technology. The Alto-Mobile line contains eight devices - we’ll dwell on those that are of most interest to the average “advanced” user who is used to high-quality audio systems.

The Control 8 is the easiest and cheapest - only about $ 160. Two entrances, two exits - nowhere is easier. However, the possibilities of this box - oh-oh-her … Digital delay on any channel, eight-band equalizer (not only that parametric is also individual for each channel!), High-pass and low-pass filters with a variable frequency range that cover the entire music spectrum. All inputs and outputs are adjustable: adjusters will understand. Say, if an unpleasant background goes through some channel, which cannot be eliminated in any way, then it’s enough to reduce the sensitivity along this input, “drown” the background in this way, and increase the gain at the output - that’s all. By the way, you can control the “box” from the remote control - there even a display is provided. However, you have to pay a little extra for it.

The Control 16 model is distinguished by the number of bands in the equalizer - it is clear that there are 16. This quality can actually be in demand, for example, when preparing a car for car audio competitions - let's say to get a linear amplitude-frequency response … Well, if we switch from amateur level to professional, then instead of “Control” you need to use other models - for example, “Drive”.

Drive 20 costs about $ 330. He has two entrances, but five exits. Of these five, four allow you to change the characteristic of the signal in almost any way: setting it to “tweeters” - please, to the mid frequencies - no question, to mid-bass - even easier. The most advanced solutions based on Drive 20 are, for example, a two-component system with separate individual settings for each (!) Speaker plus a subwoofer - remember the fifth output?

The next model, Drive 30, is about thirty more expensive. There are also two entrances, and there are already seven exits. The first six are convenient to use, say, for a developed three-component scheme - again with an individual adjustment of each speaker, and the last channel, as before, is given to the subwoofer. The installer is just a paradise here: with such a thing, it can change the characteristics of the filters, arbitrarily adjust the equalizers - and for each channel separately! You can turn off the channel completely, “spin the phase”, set any delay - in general, do what you want. You can also climb the menu and assign each channel its own purpose - for example, under the central channel of a home theater …

A MORE?

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Actually, there are eight different Alto-Mobile models: from the youngest Dynamate to the older UCS P.

Dynamite is a device that has no analogues: it contains very interesting factory presets. Say, emphasizing the subtle nuances of a piece of music, barely audible details - or, for example, changing the sound of an audio system depending on the style of music being listened to, not only at the level of cheap "bassbusts" and "hibusts", but much more delicately and intelligently. And the next model, “Sub 16”, has the broadest possibilities for tuning the subwoofer part of the audio system: it contains both filters with “rich” adjustments and an advanced bass equalizer …

In general, the middle of the line described above has tangible advantages in the form of excellent crossovers and processor-controlled digital delays. As for the top of the lineup - UCS and UCS Pro, it focuses more on the competitive level - this is facilitated by a highly developed equalizer.

But is it possible to do without analog input signals at all - after all, all the same, compact discs already contain a “number”? It is possible, but the trouble is that the optical digital output is not standardized today. At the same Alpine, the digital-to-digital chain already works, but only with the models of the same name: a universal approach has not yet been found. It would be desirable, for example, to change the sound volume, but how will you command the processor from the “head”? To do this, you need a single data bus, and each manufacturer has its own. Rather, for the time being, suddenly something will change …

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Yes, but what about the right passenger? If you enter a delay on the left channel, he will generally not hear what … In this case, the consolation is as follows: the memory of "Alto-Mobile" allows you to set and register any number of settings - more precisely, 64 (which applies to our case and can be considered any) . One setting, for example, is to listen to the classics, the second is for rap, the seventeenth is for the right passenger (or passenger), sixty-fourth is a compromise. However, a compromise is when everyone is bad …

And the last one. Setting up an Alto-Mobile-type device is a long process, it can take many hours. So, two nice messages. Firstly, if you want to save time for your colleagues, you can upload the successful setting you received once into a personal computer and keep it there in your memory - it will come in handy … Of course, you will have to modify it for a specific machine, but in a rough version the first inclusion will already be spelled out. Secondly, when you reset the power (changed the battery!), All settings are saved …

And let's talk about other digital tricks next time.

To smooth out a deliberately skewed music scene, you need to create time delays for the left channel speakers. This is one of the tasks of the sound processor.