Silence Splitter

Silence Splitter is an iOS app that lets you split audio files automatically at silent sections and save them as separate files.

App Storeでダウンロード

Table of Contents

Overview

Silence Splitter automatically detects silent parts in an audio file and splits it into sections.
It helps you organize long recordings or language-learning materials into manageable phrases or utterances.
You can also extract only the parts you need, or save a memorable passage separately.

Key Features

  • 🔍 Silence Detection: Automatically detects silent parts in audio and splits into sections
  • 🎵 Waveform Editor: Adjust split points visually on the waveform
  • ⏯ Playback Control: Change playback speed and pause duration for repeat practice
  • 📂 Export Sections: Save split audio sections as new files
  • ⚙️ Flexible Settings: Customize silence threshold, minimum sound length, and more

Recommended For

  • Language learners who want to practice phrases repeatedly
  • Students or researchers who want to organize/edit lectures or interviews
  • Anyone dealing with long recordings efficiently

How to Use

Import a File

Tap “Import File” or “Import Podcast / Music” to open the file selection screen.

  • Import File
    Tap the “Import File” button to open the Files app.
    You can choose from iCloud Drive, Google Drive, or other cloud storage services, as well as audio files saved locally on your device. By default, only iCloud Drive is visible.
    To add other cloud services:
    1. Tap the three dots in the left sidebar > Edit Sidebar
    2. Under Locations, enable Google Drive or OneDrive
  • Import Podcast / Music
    Import audio files from Podcasts or your Music Library. Note:
    • DRM-protected files (such as Apple Music tracks) cannot be imported
    • Items stored only in the cloud (with a cloud icon) must be downloaded first

Once imported, the file will be automatically split at silent sections, and the waveform editor will appear at the top of the screen.
At the same time, speech recognition will display the beginning text of each section.

Export

Tap “Export” to save the split files into the app’s folder.

  • Exported files can be accessed from the Files app
  • You can also use “Zip & Share” to send via AirDrop to your Mac or open them in other apps

Waveform Editor

  • Select sections to export
  • Move, delete, or add split points
  • Tap ▶︎ on the right to play a section
  • Uncheck the box on the left to exclude a section from export
  • Drag to move a split point, or tap to delete/add one
  • Pinch with two fingers to zoom in/out on the waveform

Settings

  • Silence Detection
    • Threshold Time: Silent sections longer than this are recognized as silence
    • Noise Tolerance: The higher the value, the more background noise is tolerated as silence
  • Language
    Select the language spoken in the audio file. Used for speech recognition.
  • Trim Trailing Silence
    When enabled, trailing silence at the end of each section is cut.

Privacy Policy

Please see our Privacy Policy here.

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