86 lines
5.8 KiB
Markdown
86 lines
5.8 KiB
Markdown
# Changelog
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## [v1.2.1] - 2024-12-20
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### Added
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- **High-Quality Filter Implementation**: Direct Form II Transposed filter structure for improved numerical stability
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- **Filter Warm-Up**: Proper filter initialization to avoid transients, especially important for MPT transforms
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- **Anti-Aliasing in Resampling**: Automatic anti-aliasing filter when downsampling to prevent aliasing artifacts
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### Fixed
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- **MPT Filter Application**: MPT IRs now correctly use the filtered recorded sweep (same as RAW IRs)
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- **Filter Response at Lower Sample Rates**: Fixed filter response accuracy when resampling to 48kHz and other lower sample rates
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- **Resampling Artifacts**: Added proper anti-aliasing to prevent frequency aliasing when downsampling
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### Changed
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- **Filter Quality**: Improved filter implementation with high-precision coefficient calculation and proper state management
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- **Filter Artifacts**: Reduced artifacts in steep filters (48+ dB/octave) through better numerical stability
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### Technical Improvements
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- **Direct Form II Transposed**: More numerically stable filter structure for cascaded filters
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- **Filter Warm-Up**: Pre-initialization of filter state to eliminate transients
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- **Anti-Aliasing**: Steep low-pass filter (48 dB/octave) applied before downsampling to prevent aliasing
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## [v1.2.0] - 2024-12-20
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### Added
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- **Cabpack Generation**: Complete cabpack creation with IRs in 9 different formats organized in structured directory trees
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- **Default Mode**: Run without command-line options for automatic cabpack generation from current directory
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- **Executable Directory Detection**: Automatic detection of binary location for double-click support in Finder/Explorer
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- **Automatic File Organization**: Support for `selection.txt` and `ambient.txt` files to automatically organize IRs
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- **Mixes Folder Support**: Automatic conversion of ready-to-use IRs from `mixes` folder to all cabpack formats
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- **IR Filename in Plots**: IR filenames now displayed in plot titles for better identification
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- **Cabpack Defaults**: Automatic defaults for cabpack mode (fade-ms: 10, lowcut: 40Hz)
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- **Plots for Mixes**: Automatic plot generation for mix IRs in `plots/mixes` folder
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- **Logo in Plots**: Valhallir logo automatically displayed in upper-left corner of all generated plots (embedded in binary)
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### Changed
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- **Optional Command-Line Flags**: All main flags (`--sweep`, `--recorded`, `--output`) are now optional with intelligent defaults
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- **Default Sweep File**: Changed default sweep filename to `sweep.wav` (simpler naming)
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- **Output Directory**: IRs folder created one directory level up from recorded directory by default
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- **Directory Structure**: Added `mixes` subfolder to each format folder (only created if `mixes` folder exists)
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- **Conditional Folder Creation**: `selection`, `ambient mics`, and `mixes` folders are only created if the corresponding files/folders exist in the recorded directory
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### Technical Improvements
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- **Smart Path Detection**: Uses executable directory when double-clicked, current directory when run from command line
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- **Enhanced Logging**: Better progress information and path logging for debugging
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- **Improved Error Handling**: Graceful handling of missing optional files (selection.txt, ambient.txt, mixes folder)
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## [v1.1.0] - 2024-12-19
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### Added
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- **IR Visualization**: New `--plot-ir` flag to generate frequency response and waveform plots
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- **Professional Plotting**: Frequency response (dB vs Hz) and time-aligned waveform visualization
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- **Valhallir Branding**: Logo and filename information in generated plots
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- **Modular Architecture**: Separated plotting logic into dedicated `pkg/plot` package
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- **Enhanced File Management**: Plots are saved in the same directory as IR files with matching names
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- **Improved Documentation**: Updated README with plotting features and usage examples
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- **Linear Fade-Out**: New `--fade-ms` option to apply linear fade-out to IRs (default 5ms)
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- **High/Low-Cut Filtering**: New `--highcut` and `--lowcut` options for frequency filtering
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- **Configurable Filter Slopes**: New `--cut-slope` option for filter steepness (12, 24, 36, 48 dB/oct)
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- **Audio Resampling**: Automatic resampling between different sample rates (44.1, 48, 88.2, 96 kHz)
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- **Enhanced Audio Processing**: Cascade filtering for steeper slopes and better frequency response
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- **Assets Integration**: Added Valhallir logo for professional plot branding
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### Changed
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- **Package Structure**: Refactored codebase with separate packages for audio processing and visualization
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- **Plot File Naming**: Plots now use the same base name as IR files (e.g., `ir.png` instead of `ir_plot.png`)
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- **Repository Organization**: Updated `.gitignore` to exclude generated files while preserving essential test files
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- **Enhanced Error Handling**: Improved validation and error messages for all new features
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- **Better Logging**: More detailed progress information during processing
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### Technical Improvements
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- **Clean Architecture**: Separated concerns between audio processing (`pkg/convolve`) and visualization (`pkg/plot`)
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- **Better Maintainability**: Modular design makes it easier to extend and modify features
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- **Enhanced Audio Quality**: Improved filtering algorithms with cascade implementation
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- **Professional Output**: Better IR quality with fade-out and advanced filtering options
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## [v1.0.0] - 2024-06-09
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### Added
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- Initial public release: Valhallir Deconvolver
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- Fast FFT-based deconvolution for IR extraction
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- Automatic input conversion: accepts any WAV sample rate, bit depth, or channel count
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- Output IR in user-selectable sample rate and bit depth (WAV only)
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- Optional minimum phase transform (MPT) output
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- Silence trimming and normalization
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- Optional output IR length control (`--length-ms`)
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- Mono output (stereo/multichannel inputs are averaged)
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- CLI with urfave/cli, version flag, and detailed logging
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- Full documentation and usage examples in README |