APU Software APU Loudness Limiter 3.0.2 (Windows/MacOS)

The APU Loudness Limiter is a real-time limiter designed to support multiple loudness types simultaneously. The limiter can be configured to use LUFS, True Peak, RMS, and/or Peak loudness types. This allows you to target multiple requirements simultaneously, such as a specific LUFS target and a specific True Peak target. Internally, the ballistics of the limiter are adjusted to accommodate the different loudness type limiter settings.

Loudness flavors One of the key features of this limiter is its support for a variety of loudness types. The limiter’s detection circuitry can be configured to use either LUFS and/or traditional measurement units (RMS, Peak). You can also choose to split or link channels, which is particularly useful for multi-channel audio formats such as Dolby Atmos®.

The limiter’s detection circuitry can be configured to use any of the following loudness types

Momentary Momentary is a short duration LUFS measurement (400ms), which is useful for processing the audio’s moment-by-moment dynamics. This mode is responsive but also transparent. K-weighting and channel weighting are applied to the compressor’s detection circuitry, improving perceptual accuracy.

Short-Term Short-Term is a longer duration LUFS measurement (3 seconds), which is useful for processing the audio’s large scale dynamics. Given the longer duration, this mode is less responsive than momentary, but it can be useful for adjusting the bigger picture of the audio’s dynamics. K-weighting and channel weighting are applied as with momentary.

Integrated Integrated is an infinite duration LUFS measurement. K-weighting and channel weighting are applied as with momentary, as well as both relative and absolute gating. This loudness type can be useful for continuously wrangling the audio’s integrated loudness toward a specific target.

RMS RMS loudness types use a rolling time interval of 150ms by default, which can be adjusted. RMS is a traditional loudness measurement, which is a good first-order approximation of perceived loudness. This mode doesn’t apply K-weighting or channel weighting to the limiter’s detection circuitry, giving it a more traditional character.

True Peak True Peak loudness types are similar to traditional peak measurements, but they are more accurate as they take into consideration inter-sample peaks. These measurements use a time interval equal to the configured block size (1ms by default). This mode prevents clipping inter-sample peaks, which can be useful for mastering.

Whats New

APU Loudness Limiter 是一个实时压缩器，旨在同时支持多种响度类型。它可以配置以使用 LUFS、True Peak、RMS 和/或峰值响度类型。这允许你同时满足多个需求，例如特定的 LUFS 目标和特定的 True Peak 目标。内部，限幅器的运动学被调整来适应不同的响度类型设置。

响度风味 这个限幅器的一个关键特性是支持多种响度类型。检测电路可以配置为使用 LUFS 和/或传统测量单位（RMS、峰值）。你也可以选择分离或链接通道，这对于多声道音频格式如 Dolby Atmos® 特别有用。

检测电路可以配置以使用以下任何一种响度类型

瞬时 瞬时是一种短持续时间的 LUFS 测量（400 毫秒），适用于处理音频的瞬间动态。这种模式响应灵敏但也很透明。压缩器的检测电路应用了 K 重采样和通道重采样，从而改善了感知准确性。

短期 短期是一种更长时间的 LUFS 测量（3 秒钟），适用于处理音频的大规模动态。由于持续时间较长，这种模式响应性不如瞬时模式，但可以用于调整整体音频动态。K 重采样和通道重采样与瞬时模式相同。

集成 集成是无限长的 LUFS 测量。K 重采样和通道重采样与瞬时模式一样，以及相对和绝对门控。这种响度类型可用于将音频的整合响度引导向特定目标。

RMS RMS 响度类型默认使用一个滚动时间间隔（150 毫秒），可以调整。RMS 是一种传统响度测量，是感知响度的一个良好的第一级近似值。这种模式不将 K 重采样或通道重采样应用于限幅器的检测电路，从而赋予其更传统的特性。

真实峰值 真实峰值响度类型与传统峰值测量相似，但它们更准确，因为考虑到了样本之间的峰点。这些测量使用配置块大小（默认为 1 毫秒）的间隔时间。这种模式防止了样本间的峰值剪切，这对于母带制作很有用。

新特性

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