音樂變速器 - Speed Shifter

🎵 Speed ​​Shifter - A professional-grade audio speed adjustment tool, processing data entirely locally to protect your privacy.

Whether practicing singing, composing music, or learning an instrument, easily adjust the playback speed.

✨ Main Features

【Instant Speed ​​Adjustment】

- Precise multi-speed adjustment (0.5× ~ 2.0×)

- One-click acceleration/deceleration, hear the change instantly

- Visual speed indicator clearly displays the current speed

【High-Quality Output】

- Supports WAV lossless output — preserves original sound quality, suitable for professional use

- Supports MP3 compressed output — small file size, easy to share

- Automatic file naming (original filename_speed + speed)

【Wide Format Support】

- Full support: MP3, WAV, AAC, M4A

- Compatible with most devices: FLAC, OGG

- Direct processing without conversion

【Completely Offline Processing】

- All speed adjustments are completed locally on your phone

- No internet required, no file uploads

- 100% privacy guaranteed

🎯 Who is it suitable for?

🎤 KTV Singers Want to keep up with fast-paced songs? Practice slowly to master the basics, then gradually increase the speed to the original!

🎸 Music Creators: Listen to the different tempos of the arrangement to find the most suitable rhythm version.

🎹 Instrument Learners: Slow down your practice pieces to a comfortable tempo, progressing gradually for better results.

🎧 Music Lovers: Simply want to experience the atmosphere of songs at different speeds? You can easily try it out.

💡 Why choose Speed ​​Shifter?

✓ Simple Interface — No learning curve, just open and use!

✓ Fast Processing — A 5-minute song completed in under 30 seconds.

✓ Excellent Sound Quality — Utilizes industry-standard variable speed algorithm.

✓ Privacy First — No personal data collection.

✓ Small Size — Minimal storage space on your phone.

🔒 Privacy Commitment

This application promises:

- No collection of personal data such as name, phone number, or email address.

- No access to your contacts or photo album.

- No uploading of your audio files to any server.

- All calculations are performed locally on your device.

For a detailed privacy policy, please refer to the link within the application.

📱 System Requirements

- Android 7.0 or higher

- 2GB or more RAM recommended

- Approximately 50MB storage space

💬 About the Developer

Qina Music is dedicated to creating lightweight, user-friendly, and privacy-focused tools for music creators.

⚠️ Important Notes

- The speed adjustment process requires loading the entire song into memory. Long audio files (over 30 minutes) may cause your phone to lag.

- WAV files are large; we recommend exporting to MP3 to save space.

- FLAC and OGG compatibility depends on your device. If you cannot open them, please use MP3 or WAV instead.

- This application contains ads; ad revenue will support continued development.

Thank you for downloading! Enjoy using it! 🎶