Update to version 1.1.0 with comprehensive changelog and README updates

CHANGELOG.md

@@ -1,5 +1,33 @@
 # Changelog
 
+## [v1.1.0] - 2024-12-19
+### Added
+- **IR Visualization**: New `--plot-ir` flag to generate frequency response and waveform plots
+- **Professional Plotting**: Frequency response (dB vs Hz) and time-aligned waveform visualization
+- **Valhallir Branding**: Logo and filename information in generated plots
+- **Modular Architecture**: Separated plotting logic into dedicated `pkg/plot` package
+- **Enhanced File Management**: Plots are saved in the same directory as IR files with matching names
+- **Improved Documentation**: Updated README with plotting features and usage examples
+- **Linear Fade-Out**: New `--fade-ms` option to apply linear fade-out to IRs (default 5ms)
+- **High/Low-Cut Filtering**: New `--highcut` and `--lowcut` options for frequency filtering
+- **Configurable Filter Slopes**: New `--cut-slope` option for filter steepness (12, 24, 36, 48 dB/oct)
+- **Audio Resampling**: Automatic resampling between different sample rates (44.1, 48, 88.2, 96 kHz)
+- **Enhanced Audio Processing**: Cascade filtering for steeper slopes and better frequency response
+- **Assets Integration**: Added Valhallir logo for professional plot branding
+
+### Changed
+- **Package Structure**: Refactored codebase with separate packages for audio processing and visualization
+- **Plot File Naming**: Plots now use the same base name as IR files (e.g., `ir.png` instead of `ir_plot.png`)
+- **Repository Organization**: Updated `.gitignore` to exclude generated files while preserving essential test files
+- **Enhanced Error Handling**: Improved validation and error messages for all new features
+- **Better Logging**: More detailed progress information during processing
+
+### Technical Improvements
+- **Clean Architecture**: Separated concerns between audio processing (`pkg/convolve`) and visualization (`pkg/plot`)
+- **Better Maintainability**: Modular design makes it easier to extend and modify features
+- **Enhanced Audio Quality**: Improved filtering algorithms with cascade implementation
+- **Professional Output**: Better IR quality with fade-out and advanced filtering options
+
 ## [v1.0.0] - 2024-06-09
 ### Added
 - Initial public release: Valhallir Deconvolver

README.md

@@ -9,11 +9,12 @@ A CLI tool for processing WAV files to generate impulse responses (IR) from swee
 - **Optional output IR length:** Specify output IR length in milliseconds with --length-ms
 - **Optional low-cut and high-cut filtering:** Apply Butterworth filters to the recorded sweep before IR extraction (--lowcut, --highcut, --cut-slope)
 - **Automatic fade-out:** Linear fade-out at the end of the IR to avoid clicks (default 5 ms, configurable with --fade-ms)
+- **IR Visualization:** Generate frequency response and waveform plots with `--plot-ir`
 - **96kHz 24-bit WAV file support** for high-quality audio processing
 - **Multiple output formats** with configurable sample rates and bit depths
 - **Minimum Phase Transform (MPT)** option for reduced latency IRs
 - **Automatic silence trimming** and normalization
-- **Modular design** with separate packages for WAV I/O and convolution
+- **Modular design** with separate packages for WAV I/O, convolution, and visualization
 - **Robust error handling** and validation
 
 ## Installation
@@ -87,6 +88,24 @@ You can control the filter steepness (slope) with `--cut-slope` (in dB/octave, d
 
 This applies a 40 Hz low-cut and 18 kHz high-cut, both with a 24 dB/octave slope (steeper than the default 12).
 
+### IR Visualization
+
+Generate frequency response and waveform plots of your IRs:
+
+```sh
+./valhallir-deconvolver --sweep sweep.wav --recorded recorded.wav --output ir.wav --plot-ir
+```
+
+This creates:
+- `ir.wav` - The impulse response file
+- `ir.png` - A professional plot showing frequency response and waveform
+
+The plot includes:
+- **Frequency Response:** dB vs Hz with log frequency scale (20Hz-20kHz)
+- **Waveform:** Time-domain view of the first 10ms of the IR
+- **Valhallir Branding:** Logo and filename information
+- **Professional Layout:** Clean, publication-ready visualization
+
 ### Different Output Formats
 
 Generate IRs in different sample rates and bit depths:
@@ -150,6 +169,7 @@ Generate IRs in different sample rates and bit depths:
 | `--lowcut` | Low-cut filter (high-pass) cutoff frequency in Hz (recorded sweep) | - | No |
 | `--highcut` | High-cut filter (low-pass) cutoff frequency in Hz (recorded sweep) | - | No |
 | `--cut-slope` | Filter slope in dB/octave (12, 24, 36, ...; default 12) | 12 | No |
+| `--plot-ir` | Generate frequency response and waveform plot | false | No |
 
 ## File Requirements
 
@@ -198,6 +218,13 @@ Generate IRs in different sample rates and bit depths:
 - **Maintains frequency response** while optimizing phase characteristics
 - **Suitable for real-time applications** like guitar amp modeling
 
+### IR Visualization
+- **Frequency Response Plot:** Shows magnitude response in dB vs Hz with log frequency scale
+- **Waveform Plot:** Displays the first 10ms of the IR in the time domain
+- **Professional Layout:** Clean, publication-ready plots with Valhallir branding
+- **Automatic File Naming:** Plots are saved with the same base name as the IR file
+- **High-Quality Output:** PNG format suitable for documentation and sharing
+
 ### Output Format Options
 - **Sample Rates:** 44.1kHz (CD), 48kHz (studio), 88.2kHz, 96kHz (high-res)
 - **Bit Depths:** 16-bit (CD), 24-bit (studio), 32-bit (high-res)

main.go

@@ -16,7 +16,7 @@ func main() {
 	app := &cli.App{
 		Name:    "valhallir-deconvolver",
 		Usage:   "Deconvolve sweep and recorded WAV files to create impulse responses",
-		Version: "v1.0.0",
+		Version: "v1.1.0",
 		Flags: []cli.Flag{
 			&cli.StringFlag{
 				Name:     "sweep",