NUGEN Audio Surround Suite — Free Download

Purpose and Core Components

Surround Suite is designed for professionals who need to create, refine, and deliver surround sound content. It combines several tools that address different stages of the surround workflow, from converting stereo material to multichannel formats to ensuring compliant and polished final mixes. The suite includes Halo Upmix for stereo-to-surround conversion, Halo Downmix for creating stereo versions from surround mixes, ISL for True Peak limiting, and SEQ-S for linear phase EQ in surround.

This collection is suited for music, post-production, and broadcast. It helps users achieve natural and coherent upmixes, transparent loudness control, and precise frequency shaping. By integrating these functions into one suite, the workflow becomes more consistent and efficient, reducing the need for multiple separate processors.

Upscaling and Downmixing Capabilities

Halo Upmix offers unique centre channel management, including switchable dialog extraction, making it useful for archive restoration, television, and feature film work up to 7.1 surround. Unlike older upmixing methods, it provides full downmix compatibility, ensuring that the upmixed surround material will fold down to stereo without issues. For users working in immersive formats like Dolby Atmos, Auro 3D, or Ambisonics, a 3D audio version is available separately.

Halo Downmix acts as the bridge between surround and stereo delivery. It allows precise control over downmix balances and includes monitoring features to accelerate productivity. This means engineers can deliver both stereo and surround versions without compromise, ensuring the stereo fold-down preserves the intended mix.

Limiting and EQ Processing

ISL provides transparent True Peak limiting with a dedicated TPlim control that adjusts transfer curve parameters automatically. This ensures minimal invasive brick-wall protection, so you don’t have to guess about headroom or worry about downstream issues. It simplifies the process of setting true peak limits, making it reliable for broadcast and streaming deliveries.

SEQ-S delivers linear phase EQ in surround modes up to 7.1, plus stereo mid/side operation and automated spectrum analysis. It supports EQ matching between different sources, and automated morphing allows for controlled transitions between scenes or creative sound design. This makes it powerful for both corrective and artistic EQ work in a multichannel context.

Workflow and Applications

In practice, you might start with a stereo mix and use Halo Upmix to expand it to 5.1 or 7.1, adding depth without artificial reverb or chorus. Then apply SEQ-S to sculpt the frequencies, match EQ across different episodes, or morph between scenes.

This suite is especially beneficial for post-production houses and broadcast facilities where surround delivery is becoming standard. It helps maintain a consistent workflow from initial upmix to final stereo fold-down, saving time and reducing errors. The tools are designed to work together seamlessly, giving you a complete solution for modern audio production.

Key features

• Stereo to 5.1 and 7.1 upmixing with centre channel management and dialog extraction
• Precise and tweakable downmixing from surround to stereo for versatile delivery
• Transparent True Peak limiting with automatic transfer curve adjustment
• Linear phase EQ in surround modes up to 7.1, including mid/side operation
• Automated spectrum analysis and EQ matching/morphing for consistent tonality
• Full downmix compatibility in upmix tool to ensure clean stereo fold-downs
• 3D immersive audio option available separately for Dolby Atmos, Auro 3D, and Ambisonics

Best for

Surround Suite is ideal for audio post-production professionals, broadcast engineers, and music mixers who need to deliver high-quality surround content. It excels in scenarios requiring stereo upmixing, precise downmixing, and compliant loudness management, offering a coherent set of tools that streamline the entire surround workflow.