Insert silence between sentences for shadowing-ready audio.
Upload a speech recording, choose how many seconds of silence you want after each sentence, and download a clean, repeatable version for language learning, listening drills, or coaching.
How Shadow Space works
Upload speech audio, choose how to detect sentence boundaries, set the pauses, then download your processed file.
Step-by-step
- Upload a clear speech recording (MP3, WAV, or M4A).
- Choose a detection mode: Silence Detection (automatic) or SRT Subtitle File (exact timing).
- Tune controls like Silence Threshold, Minimum Silence Duration, Silence to Insert, and Match speech chunk length (optional).
- Click Process and download your shadowing-ready audio.
Controls and modes
- Silence Detection: splits on detected pauses using threshold + duration.
- SRT Subtitle File: uses subtitle timecodes for exact segment timing.
- Silence Threshold: lower values are stricter about what counts as silence.
- Minimum Silence Duration: how long a pause must be to create a split.
- Silence to Insert: fixed pause length (ignored when Match speech chunk length is on).
- Match speech chunk length: inserts a pause equal to the chunk length.
- Output: downloadable MP3.
Free vs Pro
- Free: up to 5 minutes per file with all core features.
- Pro: unlimited-length files, faster processing, and priority support.
- Pro access: enter your email and Pro code after subscribing.
Tips
- Silence Threshold: around −35 to −40 dB for clean studio audio.
- Minimum Silence Duration: about 300–500 ms for quick speakers.
- Silence to Insert: 3–5 seconds for shadowing practice.
Who Shadow Space is for
If you work with spoken language or coaching, this pause-insertion tool can save you a lot of time.
Language teachers
Turn your explanations, stories, and dialogues into shadowing tracks for students without re-recording everything with manual pauses.
Self-learners
Add pauses to your favorite audio so you can repeat naturally, instead of constantly jumping for the pause button on your phone.
Creators and coaches
Build guided practice versions of your content: sales scripts, pronunciation drills, affirmations, or speaking exercises clients can follow at their own pace.
FAQ
All answers stay on this page — just scroll down. The links in the header jump you to each section.
Yes. The free tier is tuned for short practice files used in lessons and self-study. Pro is available now and unlocks longer recordings and heavier use for schools and creators.
Clear speech where one person is talking at a time works best: lectures, explanations, dialogues, and coaching calls. Noisy audio or overlapping speakers may still work but might need more threshold tuning.
Yes, as long as you have rights to the original audio. The goal is to help you create better listening and shadowing materials for students and clients.
The app is designed to process audio in a privacy-conscious way. Files are used only for generating your processed output and are not meant to be kept for long-term storage.
Keywords: insert silence between sentences, shadowing-ready audio, language-learning audio pause tool, online audio editor for speech practice.
Questions or feedback?
If you have ideas for new features, found a bug, or want to share how you use Shadow Space, send a quick message here.
If you prefer, you can also email me directly at: peraperaeiakiwa@gmail.com (copy and paste into your email app)