[房间模拟器]Olivier Doaré Binaural Room Reverb (BiRR) 2D And 3D v0.0.5 [WiN, LiNUX]（17MB）

FREE | Win Linux VST2 VST3 LV2 | 61/130 MB

安装方法：无需安装，复制插件到相应的路径。
BiRR2D 和 BiRR3D 是房间模拟器，可以精确模拟听众在矩形（2D）或平行六面体（3D）房间中感知到的单声道和全向声源产生的声音。
用户可以控制房间的（x、y、z）尺寸，以及房间内声源和听众的位置。听众的方向也可以调整。墙壁属性可以通过两个或三个参数进行调整：
墙壁吸收：介于 0 和 1 之间的系数，表示反射系数。每次墙壁反弹时，声波幅度都会乘以该系数。值越高，混响越短。
墙壁高频吸收：此参数控制墙壁反弹的高频吸收。值越高，混响越暗。
墙壁扩散：此参数控制墙壁扩散属性（该参数仅在 Ambisonic 版本中可用，否则固定为 1e-3，但可能会发生变化）
输入是单声道或立体声，取决于所选版本（单声道输入或立体声输入）。输出声音是立体声混响声，具有以下配置之一：
两个 XY 配置的心形麦克风
一个 MS 配置的心形麦克风和一个八模式麦克风
一个 MS 配置的全向麦克风和一个八模式麦克风
基于 MIT medialab (https://sound.media.mit.edu/resources/KEMAR.html) 提供的 HRTF 的双耳接收器，与干原声相比，均衡后的声音尽可能中性。
全景声输出（针对全景声版本）
2D 版本模拟 2D 矩形平面域。因此，产生的双耳声不考虑源和听众的高度信息。 3D 版本模拟平行六面体房间、源和听众的高度位置。因此，后者涉及更多 CPU 计算以进行脉冲响应计算。
直接路径和反射路径
当参数发生变化时，会计算两个立体声脉冲响应并发送到卷积处理器：
直接路径脉冲响应。
脉冲响应是由于墙壁上的多次反射引起的。
直达路径和反射的效果级别可以分别调整。这些可以被视为混响的干湿参数，尽管当两个参数相等时，产生的声音在物理上是准确的。
立体声宽度：
在 XY 配置中，此参数指定两个心形麦克风之间的角度。最小值时，角度为零，产生的声音为单声道。最大值时，角度等于 180 度，麦克风垂直于头部轴线。在标准 XY 配置中，角度等于 90 度，当宽度参数等于 0.5 时发生这种情况。
在 MS 配置中，立体声量化了八字形麦克风信号的幅度（介于 0 和 1 之间）。
立体声宽度参数对双耳配置没有影响。
在 Ambisonic 版本中没有此参数。
参数更新
在每次参数更新时（Ambisonic 版本中的混响级别和头部方向除外），都会计算脉冲响应。由于必须计算每个声学路径，因此计算时间可能很长，特别是当阻尼较小时。
脉冲响应计算使用等于 CPU 数量 – 1 的线程数，这允许合理的计算时间（最近 CPU 上的最大混响时间最多为几秒钟）。
重要提示：每次参数更改后都需要一些计算时间，这会阻止参数自动化，因为它们无法实时更新。因此，此插件不能用于在虚拟空间中移动声音。
BiRR2D and BiRR3D are room simulators that accurately emulate the sound produced by a monophonic and omnidirectionnal source perceived by a listener in a rectangular (2D) or parallelepipedic (3D) room.
User can control (x, y, z) dimensions of the room, and position of source and listener in the room. The orientation of the listener can also be adjusted. Wall properties are adjusted with two or three parameters:
Wall absorbtion : a coefficient between 0 an 1, representing a reflection coefficient. The acoustic wave amplitude is multiplied by this coefficient at each wall rebound. Higher values produce a shorter reverb.
Wall high frequency absobtion : this parameter controls the high frequency absorbtion wall rebounds. Higher values produce darker reverb sound.
Wall diffusion : this parameter controls the wall diffusion properties (parameter only available in the ambisonic version, otherwise fixed to 1e-3, but this is subject to change)
The input is mono or stereo, depending on the chosen version (mono in or stereo in). The output sound is a stereo reverberberated sound with one of the following configurations:
Two cardioid microphones in XY configuration
One cardioid and one eight-pattern microphones, in MS configuration
One omni and one eight-pattern microphone, in MS configuration
Binaural receptor based on the HRTF provided by MIT medialab (https://sound.media.mit.edu/resources/KEMAR.html), and equalized to sound as neutral as possible compared to the dry original sound.
Ambisonic output (for the ambisonic version)
The 2D version simulates a 2D rectangular flat domain. Consequently, the produced binaural sound doesn’t consider height information for sources and listener. The 3D version simmulates a parallelepipedic room, height position of the sources and listener. The latter hence involves more cpu computations for the impulse responses calculations.
Direct path and reflections paths
when a parameter is changed, two stereo impluse responses are calculted and sent to convolution processors:
The direct path impluse response.
The impulse response due to multiple reflections on walls.
The effect level of direct path and reflections can be adjusted separately. These can be sought as dry and wet parameters of the reverb, although the produced sound is physically acurate when both parameters are equal.
Stereo width
In the XY configuration, this parameter specifies the angle between the two cardioid microphones. At its minimum the angle is zero and the produced sound is mono. At its maximum value, the angle equals 180 degrees, the microphones being perpendicular to the head axis. In the standard XY configuration, the angle equals 90 degrees, which occurs when the width parameter equals 0.5.
In the MS configurations the stereo with quantifies the amplitude of the figure eight microphone signal (between 0 and 1).
The stereo width parameter has no effect in the binaural configuration.
There is no such parameter in the ambisonic version
Parameters updating
At each parameter update (except reverb levels and head orientation in the ambisonic version), the impulse response is calculated. As each acoustic path has to be calculated, the computation time can be high, in particular if the damping is small.
A number of threads equal to the number of CPUs – 1 is employed for the impulse response calculation, which allows reasonable computation times (At most a few seconds for largest reverberation times on recent CPUs).
Important note: the fact that some calculation time is necessary after each parameter change prevents parameter automation, as they cannot be updated in real time. Consequently, this plugin cannot be used to move sounds in the virtual space.