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yinxiangMac OS X Lion 无论用变色龙还是Bootthink都无法引导,怎么办 2011-04-26寻找红太狼 Mac OS X Snow Leopard 变色龙安装引导程序怎么用啊,怎么进入后... 2012-03-07遥远流云 Mac OS X Lion 变色龙引导问题 2009-02-05takheng Mac OS X Leopard 变色龙引导如何删除? 2012-07-14wth123jordan OS X Mountain Lion 变色龙安装GM 无法引导 2012-06-30shwgood Mac OS X Lion 变色龙引导无法进入安装系统界面根据提供的文件信息，我们可以归纳出以下相关知识点： ### 一、引言 L-ACOUSTICS®发布的白皮书ARRAY-MORPHING_WP_EN_2-0版本介绍了其开发的Array Morphing工具，该工具作为LANETWORK MANAGER软件（版本1.2及以上）的一部分，用于快速、准确地调整任何L-ACOUSTICS® WST®线声源系统的全局设置。此工具主要针对线声源阵列的频率响应进行调整。 ### 二、Array Morphing 工具概述 #### 1. 背景介绍在使用L-ACOUSTICS®产品时，LA放大控制器提供了一系列预设配置，这些配置结合了扬声器参数控制和应用目标。一个预设能够让扬声器在特定配置下匹配到某个应用场景。然而，由于可用的工厂预设数量有限，实际使用的系统频率响应可能与配置不完全匹配，特别是对于线声源阵列系统而言。 #### 2. 工具特点 - **快速调整**：Array Morphing工具允许用户迅速调整系统设置。 - **准确度高**：能够实现高度精确的全局设置。 - **预测性**：通过对物理定律的理解，可以预测频率响应的变化。 #### 3. 技术发展自1992年以来，L-ACOUSTICS®就一直在研究影响线声源设计频率响应变化的多种因素。随着数字信号处理技术的进步，现在可以通过Array Morphing工具来解决这些问题。 ### 三、预设构建原理 #### 1. 基础理论扬声器的最终频率响应不仅取决于音箱和换能器特性，还取决于预设设置。对于分布式系统来说，通过为每个扬声器单独设置不同的预设参数来重塑频率响应是相对简单的。但对于线声源系统，由于配置的变化会显著影响频率响应，因此重塑线声源响应更为复杂。 #### 2. Array Morphing 的作用 - **简化调音过程**：Array Morphing工具通过自动化流程简化了系统工程师调整音质平衡的过程。 - **补偿物理定律**：虽然预设参数不能完全弥补物理定律的影响，但Array Morphing工具可以在一定程度上对其进行补偿。 - **适用范围广泛**：适用于所有L-ACOUSTICS® WST®线声源系统。 ### 四、Mac OS X 引导问题案例分析 #### 1. 变色龙引导程序在上述描述中提到的多个案例均涉及到了在不同版本的Mac OS X系统中使用变色龙（Chameleon）引导程序的问题。变色龙是一种开源的引导加载程序，常用于在非苹果硬件上安装运行Mac OS X。 #### 2. 具体案例 - **案例一**：“yinxiang”于2011年4月26日提问，关于Mac OS X Lion系统无法通过变色龙或Bootthink引导。 - **案例二**：“寻找红太狼”于2012年3月7日提问，在Mac OS X Snow Leopard中如何正确使用变色龙引导程序。 - **案例三**：“遥远流云”于2012年7月14日遇到Mac OS X Lion系统使用变色龙引导失败的问题。 - **案例四**：“takheng”于2009年2月5日提问，关于如何在Mac OS X Leopard中删除变色龙引导程序。 - **案例五**：“wth123jordan”于2012年7月14日在OS X Mountain Lion系统中使用变色龙安装GM版时无法引导。 - **案例六**：“shwgood”于2012年6月30日提问，在Mac OS X Lion中使用变色龙引导时无法进入安装系统界面。 #### 3. 解决方案概览 - **确认硬件兼容性**：确保使用的硬件支持所选版本的Mac OS X。 - **检查变色龙版本**：使用最新版本的变色龙可能会减少兼容性问题。 - **更新BIOS**：更新主板的BIOS以提高兼容性。 - **查阅文档**：参考变色龙官方文档或社区论坛中的解决方案。 - **寻求帮助**：加入相关论坛或社区寻求其他用户的帮助和建议。 ### 五、总结 Array Morphing工具是L-ACOUSTICS®为解决线声源系统频率响应调整难题而开发的一款强大工具，它极大地简化了系统工程师的工作流程，并提高了调音精度。同时，上述Mac OS X引导问题案例也为我们提供了关于变色龙引导程序在非苹果硬件上安装Mac OS X过程中可能遇到问题及解决思路的参考。

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W W W . L - A C O U S T I C S . C O M

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Parc de la Fontaine de Jouvence • 91462 Marcoussis Cedex • France • Ph. : +33 (0)1 69 63 69 63 • Fax: +33 (0)1 69 63 69 64 • e-mail: info@l-acoustics.com

ARRAY MORPHING

FIRST LINE SOURCE ARRAY FREQUENCY RESPONSE SETTING TOOL

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VERSION 2.0

VERSION 2.0VERSION 2.0

VERSION 2.0

Document reference: ARRAY-MORPHING_WP_EN_2-0

Distribution date: June 1

, 2012

transmitted in any form or by any means without the express written consent of the publisher.

1 INTRODUCTION

INTRODUCTIONINTRODUCTION

INTRODUCTION

The LA amplified controllers provide libraries of presets dedicated for use of L-ACOUSTICS

products. A factory

preset combines the control of speaker parameters and the application targets of the speaker. As a result, a preset

allows the loudspeaker to match a given application when arranged into a given configuration. Multiple configurations

exist from single distributed to line source array systems.

However, as the number of available factory presets is not infinite, the frequency response of the system in use does

not exactly match each configuration and may need reshaping. This operation is easy to apply for distributed systems by

using discrete preset settings for each loudspeaker.

On the contrary, it remains harder to reshape a line source response which changes much with various configurations.

As preset parameters do not compensate for the laws of physics in array coupling, System Engineers have to re-tune

the tonal balance of their systems with no guidance.

As early as 1992, L-ACOUSTICS

identified the multiple factors governing the changes in the frequency response of a

WST

line source design [1-3]. With the evolution of DSP technology, L-ACOUSTICS

has now developed the

exclusive Array Morphing tool. It is part of LA NETWORK MANAGER software (version 1.2 and latest) and allows

quick, accurate, and predictable global settings for any L-ACOUSTICS

WST

system.

2 PRESET CONSTRUCTION

PRESET CONSTRUCTIONPRESET CONSTRUCTION

PRESET CONSTRUCTION

2.1 Fundamentals

The final frequency response of a loudspeaker not only depends on the enclosure and transducer characteristics but

also on the preset which is the final electronic transducer optimization.

The preset contains the DSP parameters for controlling the bandwidth (shelving and X-over filtering) and power

resources for each frequency section. The goal is to optimize resources for each section by ensuring individual

transducer thermal and mechanical protection as well as offering the user the desired frequency contour for a given

application.

In this way, the preset contributes to the acoustic performance of the loudspeaker. These can be compared to the

motor of a car: this organ develops power. But a question remains: which envelope to choose to make the car

attractive and suitable for practical use?

While transducers and amplification define the power and the bandwidth abilities of the speaker system, the enclosure

design and the preset parameters optimize the acoustic performance. In addition, the preset includes complementary

EQ to provide the sonic signature of the loudspeaker (typically the sonic envelope for the application).

As a result, a preset construction addresses the acoustic performance as well as the sonic signature of a loudspeaker.

Both aspects are independent, since a speaker may yield excellent acoustic performance and poor sonic signature. The

contrary is also possible.

To obtain excellent results, it is necessary to take into account all the parameters governing the acoustics of a

loudspeaker system. These parameters are different for each system type, configuration and use. These parameters

have been identified and classified by L-ACOUSTICS

in the case of line source array systems.

W W W . L - A C O U S T I C S . C O M

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Parc de la Fontaine de Jouvence • 91462 Marcoussis Cedex • France • Ph. : +33 (0)1 69 63 69 63 • Fax: +33 (0)1 69 63 69 64 • e-mail: info@l-acoustics.com

ARRAY MORPHING

FIRST LINE SOURCE ARRAY FREQUENCY RESPONSE SETTING TOOL

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2.2 Line source array parameters

The transfer function of a line source array (denoted

array

) is governed by three sets of parameters respectively linked

to the environmental conditions, system application and array geometry (array size, array curvature, and listening

distance) as it is shown in the following formula:

[

]

distcurvsizeappenvarray

TTTT TT

env

denotes the environmental influence due to room acoustics and air absorption. These effects may be

compensated using the integrated Contour EQ setting tool in LA NETWORK MANAGER or an external EQ station.

app

is a function of the product type, system configuration, and preset that have been selected to match a particular

application. As an example, the frequency responses of three different systems are given in Figure 1 (after SPL rescaling

to make the comparisons easier). They have been obtained by successively applying the

app

transfer function of each

system to a pink noise signal:

Figure 1: Three representative system frequency responses

a. Single coaxial speakers (or 2-KIVA or 1-KARA fill line source arrays) for distributed applications. The [FILL]

preset has been selected to obtain a “flat” response in free field conditions. Two other presets are available:

[FRONT] for FOH application and [MONITOR] to match half-space conditions (last for coaxial only).

b. KIVA (or KARA) line source array with low frequency extension (KILO or SB18). The low frequency response

can be from “flat” to slightly enhanced. Such a system is modular as it can match different applications (theatre,

arena, stadium) for all audience sizes.

c. K1 (or KUDO or V-DOSC) line source array for concert-touring applications with large audiences. The low

frequency response is enhanced to satisfy near-field experience at any distance. The presets used to obtain

such a response are based on the “12 V-DOSC (10-80 m coverage) @ 40 m” response curve that has become

the L-ACOUSTICS

reference over 15 years of international feedback experience.

size

curv

, and

dist

are respectively linked to the array size, array curvature, and listening distance. Their influence

will be discussed in the following section.

2 KILO + 6

KIVA line source array

(10

40 m coverage) @ 2

0 m

(10

80 m coverage) @ 40 m

a. Single 8XT @ 10 m

Frequency

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