Audio Speed Changer

Struggling to Learn a Song by Ear or Catch Every Word in a Podcast?

Standard media players offer only one fixed playback speed. If a language lesson is too fast, a guitar riff is too complex, or a lecture is too dense, you are left with no choice but to rewind and strain. The Audio Speed Changer solves this by giving you precise, real-time control over the speed of any audio file, transforming passive listening into active analysis.

Core Functionality: Real-Time Speed Control with Precision Markers

This tool is built around a single, powerful capability: altering the playback speed of audio files without affecting the pitch (or optionally, allowing pitch shift for creative effects). The core engine processes MP3 and WAV files—the two most universal audio formats on Android—directly on your device. Unlike basic players with a single "slow" or "fast" setting, this app provides a granular percentage-based slider, ranging from a 100% increase (double speed) to a 100% decrease (half speed). This allows for fine-tuning, such as slowing a guitar solo to 70% to learn the fingering, or accelerating a podcast to 150% to save time.

Advanced Feature: Marker-Based Speed Zones

Beyond simple global speed changes, the app introduces a marker system. You can place multiple markers within a single audio track to define distinct segments. Each segment can then be assigned its own independent speed setting. This is ideal for:

• Language Learning: Slow down the first 10 seconds of a difficult phrase to 60%, then let the rest of the sentence play at normal speed.
• Music Practice: Speed up the chorus to 110% for a challenge, while slowing down the bridge to 75% for practice.
• Audiobook Study: Mark key paragraphs for slow, careful listening while maintaining a faster pace for narrative sections.

Batch Processing & Folder Management

The application is not limited to single-file editing. It includes a batch processing engine capable of handling entire folders of audio files. You can import a whole directory of lecture recordings, dictate a playlist of practice tracks, or load an album of voice memos. The app will apply your chosen speed and marker settings to every file in the folder, saving you from repetitive manual adjustments.

Technical Specifications & Interface

• Format Support: Fully compatible with MP3 and WAV files.
• Speed Range: Adjustable from -100% (very slow, low-frequency emphasis) to +100% (very fast, high-frequency emphasis).
• No Ad Interruptions: The base application is ad-supported, but an optional Turbo upgrade removes all advertisements and unlocks additional features.
• Interface Design: A clean, functional layout with a central speed dial and a timeline view for managing markers.

Key Features at a Glance

• Real-time audio speed slider.
• Segment-specific speed markers.
• Batch folder processing.
• MP3 and WAV compatibility.

Download Mobile App Now

Get instant, offline control over your audio playback. This is a limited-time offer for the full feature set—upgrade to Turbo today for an ad-free experience and exclusive access to advanced batch processing tools.

Technical Disclaimer: Internet connection required for initial download and optional IAP (Turbo upgrade).