# Dolby Surround Pro Logic II
**Wikidata**: [Q3712583](https://www.wikidata.org/wiki/Q3712583)  
**Source**: https://4ort.xyz/entity/dolby-surround-pro-logic-ii

## Summary
Dolby Surround Pro Logic II is a multi-channel sound format invented by Dolby. It functions as a subclass of multi-channel sound systems, designed to process audio for immersive environments such as home theaters and cinemas. The technology is recognized by various technical identifiers and has maintained a distinct visual brand identity since the year 2000.

## Key Facts
- **Class and Type:** It is an instance of a **sound format** and a subclass of **multi-channel sound system**.
- **Inventor:** The technology was developed by **Dolby**.
- **Brand Timeline:** The entity has used two primary logos:
    - `Dolby-Surround-Pro-Logic-II.svg` (active between **2000** and **2006**).
    - `Dolby Pro Logic II.svg` (active starting in **2007** and preferred).
- **Technical Identifiers:**
    - **IPTC Newscode:** `audiocodec/c007`.
    - **MobyGames Attribute ID:** `206`.
    - **Google Knowledge Graph ID:** `/g/121dc7p2`.
- **Digital Presence:** It has a sitelink count of 1 and is featured on the **Italian Wikipedia**.

## FAQs
### What category of audio technology does Dolby Surround Pro Logic II belong to?
Dolby Surround Pro Logic II is classified as a sound format and is a specific subclass of multi-channel sound systems, which distribute audio across multiple channels to create immersive sound environments.

### Who invented Dolby Surround Pro Logic II?
The technology was invented by Dolby. It is part of a broader family of audio technologies, including foundational digital surround technologies and analog surround decoding methods.

### Where can Dolby Surround Pro Logic II be found online?
The entity has an entry on the Italian Wikipedia. It is also indexed in the Google Knowledge Graph and has associated logos available on Wikimedia Commons.

## Why It Matters
Dolby Surround Pro Logic II matters as a specialized implementation within the broader revolution of multi-channel audio. By serving as a bridge in the "sound format" and "surround sound" ecosystem, it contributes to the spatial and directional audio experiences standard in modern home theaters and cinemas. It represents a step in the evolution from basic stereo and analog surround decoding (such as the original Dolby Pro Logic) toward the complex, immersive environments now found in advanced formats like Dolby Atmos. As part of the multi-channel lineage, it helps simulate real-world acoustics, enhancing the realism of movies and music by distributing sound across speaker arrays rather than limiting it to two channels.

## Notable For
- Being a distinct **sound format** subclassed under multi-channel audio systems.
- possessing specific **IPTC** and **MobyGames** technical identifiers, indicating its use in news metadata and gaming.
- A clearly defined **visual brand history** with logo changes occurring in 2000, 2006, and 2007.
- Being part of the Dolby family of technologies, which includes foundational digital surround and object-based 3D audio.

## Body

### Classification and Technical Context
Dolby Surround Pro Logic II is explicitly defined as a **sound format** and is categorized as a subclass of the **multi-channel sound system**. As a multi-channel system, it operates within the domain of audio reproduction that utilizes more than two discrete audio channels. This classification places it alongside other major audio formats such as **Dolby Digital**, **DTS**, **Dolby Atmos**, and **Sony Dynamic Digital Sound**.

While the parent category of multi-channel sound systems encompasses configurations like **5.1** (five speakers plus a subwoofer) and **7.1** setups, Dolby Surround Pro Logic II serves as a specific technological standard within this hierarchy. It is distinguished from standard stereo systems by its ability to distribute sound spatially, creating a surrounding effect for the listener.

### Development and Invention
The entity is credited to the inventor **Dolby**. It exists within the timeline of Dolby's audio innovations, which range from analog surround decoding methods to lossless audio extensions. The development of Pro Logic II is marked by specific chronological milestones regarding its branding.

### Visual Identity and Branding
The visual representation of Dolby Surround Pro Logic II has evolved through distinct eras, documented via its logo files on Wikimedia Commons:
- **2000–2006:** The logo `Dolby-Surround-Pro-Logic-II.svg` was in use.
- **2007–Present:** The logo `Dolby Pro Logic II.svg` became the preferred representation.

### Identifiers and Digital Footprint
The format is tracked through several unique identifiers across knowledge bases and technical registries:
- **Google Knowledge Graph:** `/g/121dc7p2`
- **IPTC Newscode:** `audiocodec/c007` (used in news metadata).
- **MobyGames Attribute:** ID `206` (indicating relevance in gaming attributes).
- **Wikipedia:** The entity has a sitelink count of 1, specifically linking to the **Italian** language edition (`it`).

### Related Technologies and Aliases
As a subclass of multi-channel sound systems, Dolby Surround Pro Logic II is conceptually related to the broader architecture of **audio systems** used in **cinema soundtracks**, **home theater systems**, and **music production**. The broader class to which it belongs is also known by aliases in other languages, such as **многоканальная звуковая система** (Russian), and appears in German and Portuguese knowledge bases. Related technological cousins include **Dolby Atmos**, **DTS-HD Master Audio**, and the **Freebase ID** `/m/02nfyj` (which refers to the parent class).