Seply

What It Does

Seply is an AI-powered speaker separation tool that transforms mixed audio recordings—podcasts, interviews, meetings, panel discussions—into individual, time-aligned WAV tracks for each detected speaker. Upload a single recording, and Seply's AI automatically identifies and isolates each voice, delivering editor-ready audio files you can preview, download, and import directly into your production workflow.

Who It's For & The Problem It Solves

Seply is built for podcast producers, video editors, transcription services, content creators, and anyone who records multi-speaker conversations on a single microphone or mixed audio track. Instead of manually cutting and splitting voices by hand—a tedious, error-prone process—Seply automates speaker separation, saving hours of editing time while maintaining sync and clarity. Whether you're working with turn-taking dialogue or overlapping speech, Seply gives you the control to edit, enhance, or isolate each voice independently.

Key Features & Capabilities

• Automatic Speaker Detection: AI identifies speakers automatically, or you can specify the expected number yourself
• Time-Aligned Outputs: Every separated track starts at the same point and stays perfectly synced with the original recording
• Standard & Advanced Modes: Standard mode handles typical turn-taking conversations; Advanced Overlap mode tackles interruptions and simultaneous speech
• Editor-Ready WAV Files: Download individual, lossless WAV tracks ready to import into any audio or video editor
• Multi-Format Support: Upload audio (WAV, MP3, M4A, AAC, FLAC, OGG, OPUS, WMA, Speex) or video (MP4, AVI, MOV, MKV, WebM) up to 1 GB
• 30+ Languages Supported: Process conversations in dozens of languages
• Preview Before Download: Listen to each separated speaker track in-browser to confirm quality before exporting
• Secure, Private Processing: Results stored privately for 30 days, with specialist processing infrastructure

Typical Workflows & Use Cases

Seply shines in podcast production (isolate host and guest tracks), interview editing (separate interviewer and subject), meeting transcription (create labeled, timestamped transcripts with speaker diarization via the separate Speech to Text tool), and video post-production (extract individual voices from mixed video audio). The tool also supports workflows where you need to keep only one person's voice—simply separate, preview, and download the track you need.

Integrations

Seply is a web-based tool accessed via browser. Separated WAV files integrate seamlessly with any DAW, video editor, or transcription workflow. The same credit system also powers Seply's Speech to Text feature for combined diarization and transcription tasks.

What Sets It Apart

Unlike speaker diarization tools that only label who spoke when, Seply creates actual, editable audio tracks for each speaker. Time-aligned outputs mean you can drop all tracks into your editor at once and work with confidence that everything stays in sync. Clear credit-based pricing shows estimated costs upfront, and a free trial (30 credits, ~3 minutes of Standard Separation) lets you test the tool risk-free before committing.