Flacbox 1.6 for iOS: Automatic Music Library Sync, 10-Band Equalizer, and OPUS Support
We’re excited to unveil a major update for Flacbox — your go-to FLAC music player for iPhone and iPad. With version 1.6, we’re rolling out some of the most requested features, plus a few powerful enhancements to take your music experience to the next level.
Whether you’re streaming from the cloud or playing hi-res files locally, Flacbox delivers uncompromised audio fidelity.
What’s New in Flacbox 1.6
Automatic Music Library Sync
Manually managing your music library is now a thing of the past. Our new sync engine automatically scans selected cloud folders and updates your music library in real-time.
- Enable it via: Settings → Music Library → Automatic Sync
- Select folders via Sync Folder → Change Settings
- Choose sync mode: Wi-Fi only or Wi-Fi + Cellular
- Enable Background Sync to auto-update while the player is active (note: increases battery usage)
Your audio collection stays up-to-date automatically — no manual refresh needed.
10-Band Equalizer
Customize your sound with our built-in 10-band equalizer, available from both the Player screen and the Settings menu.
- Adjust frequency levels between -12 dB and +12 dB
- Use built-in presets or define your own
- Modify preamp power with caution to protect your hearing
This professional-grade equalizer lets you tailor your audio for every listening environment.
OPUS File Format Support
We’ve expanded file format compatibility by adding support for the OPUS codec. You can now play high-efficiency OPUS files alongside other formats like FLAC, ALAC, and MP3 — all with equalizer support included.
External Flash Drive Integration
Now you can plug in an SD or microSD card and play music directly from external flash memory:
- Use a Lightning to SD Card Camera Reader Adapter
- Insert the flash card and connect to your device
- Open Flacbox — it will recognize your card automatically
- In Services, tap the “PowerDrive” section to browse and play files
This feature is ideal for conserving device storage and expanding your mobile music library.
Stability and Playback Fixes
We’ve addressed a common playback bug: a 2-second skip at the end of FLAC files has been fully resolved. Your tracks now play back seamlessly from start to finish.
Try Flacbox Today
Flacbox continues to evolve based on your feedback. Version 1.6 is a major step forward in providing a full-featured, audiophile-grade experience on iOS.
Download Flacbox on the App Store:
Flacbox on iTunes
Got ideas, questions, or feature requests? We’re listening. Reach out and help us shape the future of Flacbox.