Professional audio and video conversion for macOS
Broadcast-quality audio processing. Enhanced file handling. Clean UI.
- Built with AVAssetReader/AVAssetWriter
- Broadcast-quality LUFS and dBFS audio processing
- Enhanced file handling and Finder integration
- SwiftUI with responsive, native macOS controls
Core capabilities
Audio conversion
Convert any audio format to WAV, AIFF, or M4A with broadcast-quality processing.
Video conversion
Convert video to MP4/MOV with H.264, H.265, or ProRes codecs and professional frame rate control.
Professional audio
LUFS normalization, dBFS peak control, and ITU-R BS.1770 compliant K-weighting.
Smart handling
Drag & drop support, multi-file processing, and seamless Finder integration.
Batch processing
Queue multiple files for background conversion with progress tracking.
Metadata handling
Preserve or modify file metadata, creation dates, and filename conventions for professional workflows.
Native performance
Swift 6 + SwiftUI with AVFoundation. Full macOS sandbox compliance.
Supported formats
Audio input
Containers
WAV
AIFF
M4A
MP3
FLAC
Audio Codecs
AAC
ALAC
MP3
PCM
FLAC
Formats supported by macOS AVFoundation
Video input
Containers
MP4
MOV
M4V
AVI
MKV
Video Codecs
H.264/AVC
H.265/HEVC
ProRes
MPEG-4
MPEG-2
Audio Codecs
AAC
ALAC
MP3
PCM
AC-3
Formats supported by macOS AVFoundation
Audio output
WAV (PCM)
AIFF (PCM)
M4A (AAC/ALAC)
Video output
Containers
MP4
M4V
MOV
Codecs
H.264
H.265/HEVC
ProRes 422
ProRes 4444
How it works
- Add one or more audio/video files (drag & drop or "Open With" from Finder).
- Choose the target format, audio processing settings, and destination.
- Click Convert. The engine runs with AVFoundation while the UI stays responsive.
- Open the converted files directly when done.
Professional-grade conversion engine using macOS AVFoundation with
broadcast-quality audio processing and enhanced file handling for everyday use.
Technical specifications
Audio Processing
- LUFS Standards: -23, -18, -16, -14 LUFS (EBU R128, ATSC A/85)
- dBFS Normalization: -20, -18, -16, -14, -12, -10, -6, -3, 0 dBFS
- K-weighting: ITU-R BS.1770 compliant (38 Hz HP + 1681 Hz HS)
- Dual Gating: Absolute (-70 LUFS) + Relative (-10 dB below ungated)
File Handling
- Validation: Smart media file type detection
- Multi-file: "Open With" support for multiple selections
- Integration: Native Finder and system integration
- User Experience: Intuitive drag & drop and file selection
Performance
- Engine: AVAssetReader/AVAssetWriter architecture
- Memory: Efficient streaming with minimal RAM usage
- UI: SwiftUI with responsive, native macOS controls
- Batch Processing: Queue multiple files for background conversion
Frame Rate Control
- Professional Standards: 23.976fps, 24fps, 25fps, 29.97fps, 30fps, 50fps, 60fps
- Broadcast Compliance: PAL/NTSC standards with drop-frame support
- Frame Rate Conversion: Standard frame duplication/dropping (no interpolation)
- Processing: AVVideoComposition with CMTime precision