Reagent is the audio editor AI agent for REAPER.

Reagent is an AI-powered audio editing agent designed specifically for the REAPER digital audio workstation (DAW). It enables sound designers, editors, and composers to control REAPER using natural language commands, automating complex, repetitive, or time-consuming tasks without requiring scripting knowledge. Reagent operates as a contextual assistant that understands REAPER’s architecture, terminology, and workflow conventions, integrating directly with the DAW via the REAPER Bridge.
The tool targets professional and semi-professional audio practitioners who work extensively in REAPER—including sound designers for film and games, podcast editors, and electronic music producers. It is especially valuable for users managing large numbers of takes, region-based editing, spectral analysis, and iterative sound variation workflows. Reagent runs locally during audio analysis tasks, ensuring sensitive audio data remains on the user’s machine.
Reagent functions as an intermediary layer between the user and REAPER. When a user issues a natural language command—such as "create 5 variations from region 1"—Reagent first verifies the REAPER connection, then retrieves project context: markers, regions, and associated media items. It analyzes the selected region’s contents, detects transients and silences, and applies intelligent alignment and processing logic. For variation creation, it leverages available takes, aligns them by transient onset, strips silence dynamically, and applies randomized or user-specified parameters to generate distinct outputs.
Audio analysis—including UCS classification, peak detection, and spectral evaluation—is performed locally on the user’s machine. This ensures privacy and eliminates latency associated with cloud-based processing. Reagent also supports direct ReaScript execution when advanced customization is required, bridging the gap between no-code convenience and script-level control. All interactions occur through a web-based interface that maintains persistent, low-latency communication with the REAPER instance.
Reagent streamlines routine but labor-intensive audio editing tasks. Common applications include generating multiple sound design variations from a set of source takes, batch-aligning alternate performances, classifying field recordings or foley libraries using the Universal Category System, isolating and exporting non-silent segments, and automating region-based processing chains. Its ability to interpret context—such as current time selection, active track, or marker labels—enables precise, intention-driven automation. Users benefit from reduced manual effort in repetitive editing, improved consistency across iterations, faster prototyping of sound concepts, and enhanced accessibility for those less familiar with REAPER’s scripting ecosystem.
| Tier | Monthly Cost | Key Capabilities |
|---|---|---|
| Free | $0 | Basic usage limits; ideal for exploration and small-session workflows |
| Lite | $8 | Increased monthly usage quota; suitable for semi-regular use |
| Pro | $16 | Full access to long-running automation, complex multi-step workflows, and priority processing |
Pricing includes all features across tiers; differences are limited to usage volume and session duration. All plans allow cancellation at any time, and audio classification and analysis remain local regardless of subscription level.