All good music starts as an artist’s vision. After countless hours of rehearsing, recording and mixing, that vision is ready for us to hear on discs, radio and other media Unfortunately, the reality is that we are almost never able to listen to it in the exact way the artist intended, especially when we are listening in a car.

Car interiors are full of materials that obstruct and degrade sound quality. For example ,windows amplify and reflect high frequencies. Seat and dashboard coverings change certain frequencies. Carpets absorb and suppress mid frequencies.

Graphic and parametric EQs are only partial remedies for these problems. In addition, the speakers are not located at equal distances from listeners,creating an unbalanced, un-centred sound stage. Tine correction can help fix this, but only for one listening position.

These acoustical problems are so severe that no correction system has been able to overcome them. That is , until now. With the introduction of lmprint, Alpine provieds a hard ware and software combination that not only solves these problems, it actually improves the sound stage, tonal balance and definition- and does it automatically, in a matter of minutes.

Imprint is the only system that measures the entire listening area, capturing time domain information from each listening location and applying a proprietary method for processing it to represent all seat locations. This gives the people in each seat the optimal listening experience. It corrects both time and frequency problems, for an improved soundstage and smoother, more natural sound.

The technology that makes this possible is called MultEq. MultEq analyses the vehicle cabin acoustic characteristics, and creates a set of equalisation filters to correct the frequency response and time domain problems for each speaker. The technology removes sound distortion caused by the specific acoustical problems in the vehicle and applies unique FIR equalisation using more than 500 points along the frequency spectrum (instead of the small number of equaliser bands).

This optimises the sound reproduction to the specific vehicle listening environment with incredible precision. The result is that everyone in the car hears a high quality sound.

Alpine’s sound system was developed in cooperation with the best minds in the field of acoustical correction: the fornders of Audyssey Labs, professors Chris Kyriakakis and Tomlinson Holman (inventor of THX theatre sound) of the University of Southern California. For the past five years ,they have been intensively researching and testing new ways to understand the fundamental causes of room acoustical distortion. MultEq was the culmination of this research.

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所有好音乐都始源于最初的艺术家的版本。经过无数小时的排练、录音和混音后，我们可以通过光盘、广播或者其他媒介享受到。不幸的是，真实情况是我们从来都没有办法听到真正的艺术家的版本，尤其当我们在车里收听时。

在汽车内部充满着会阻碍和降低音响品质的材料。举例来说，车窗会放大和反射高频声响。座椅和仪表盘的表面遮盖会改变特定频率的声音和特性。底盘会吸收和抑制中频声响。

图形和参数均衡器只能部分对这个问题进行补偿。另外，由于扩音器和不同听者间的距离的不同也会造成不均衡的、不集中的音场。时间校正可以解决这个问题，但只能针对一个收听位置。

这些声学问题是如此严重以至于没有任何的校正系统可以加以解决。但现在不同了。在引入了Imprint系统后，阿尔派公司提供了一种软硬件结合的解决方式，它可以有效的改善音场效果、音调的平衡度和准确度——并且这一切都是自动执行的，在几分钟之内。

Imprint系统是唯一一个能够测量整个收听区域的系统，可以采集每一个收听位置的时域信息并且提供专有策略进行处理，从而可以照顾到所有的座椅位置。这样可以给任何座椅上的乘客以最佳的听觉体验。它可以修正时域和频域上音响问题来改善音场和提供更平顺、更自然的声音效果。

这些功能的实现依赖于一项技术称作多路均衡技术（MultEq）。多路均衡技术分析驾驶舱内声学特性，然后为每一个扩音器创建一组均衡过滤器来修正频率响应和时域上的问题。这项技术消除了由于一些特殊声学问题带来的音效失真的情况，并且提供了一种独特的使用频域上超过500个特征点的FIR（有限脉冲响应滤波）均衡器（取代了以往的只有少数几段的分段均衡方式）。