Sound Morphing Toolbox (SMT) Release Notes

The SMT is a set of Matlab functions that implement a sound morphing algorithm for isolated musical instrument sounds. The SMT was first presented at the Timbre 2018 conference. Further information can be found in the article presented at the CMMR 2019 conference.

Quick setup

1. Download and unzip the files to a folder (e.g., /userhome/myfolder)
2. Start Matlab
3. Open the SMT folder (e.g., /userhome/myfolder) in Matlab (Navigate to /userhome/myfolder/sound-morphing-master/ under the Current Folder menu)
4. Run the script run_smt.m to generate the example.
5. Add your own sounds to the ./audio subfolder, open and edit run_smt.m appropriately to morph your own sounds

WARNING! Before running the code for the first time, you must add the folder sound-morphing-master and all its subfolders to the Matlab search path. The script run_smt.m automatically adds the folder (and all subfolders) of the currently running script (run_smt.m) to the path. So the folder structure and the location of the script run_smt.m in that folder structure are important. If you change the location of run_smt.m (or if anything goes wrong), add the SMT folder (e.g., /userhome/myfolder/sound-morphing-master/) to your Matlab path by hand (right click on the folder /userhome/myfolder/sound-morphing-master/ in the Current Folder menu and choose Add to path > Selected Folders and Subfolders).

Dependencies

The file run_smt_dependencies.txt lists all file dependencies. All required .m files can be found in this SMT repository. However, the SMT also requires the Matlab signal processing toolbox.

Acknowledgements

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 831852 (MORPH)

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SMT 0.3.0-alpha.1

Sound Morphing Toolbox (SMT) version 0.3.0 alpha release build 1

What's new in version 0.3.0-alpha.1

• Further improvements to harmonic selection
• Harmonic selection fully integrated into sinusoidal analysis
• Choice of harmonic selection of partials (after partial tracking) or strict harmonic selection of spectral peaks (without partial tracking)
• Added interpolation of the number of partials

New functions/features in version 0.3.0-alpha.1

• Added low-level function +tools/+harm/harm_part_sel.m
• Added low-level function +tools/+harm/harm_peak_sel.m
• Updated high-level function SM/harmonic_selection.m
• Added logical flag HARMSELFLAG to function SM/sinusoidal_analysis.m to enable/disable harmonic selection
• Added logical flag PTRACKFLAG to function SM/sinusoidal_analysis.m to enable/disblable partial tracking
• Added text flag PTRACKALGFLAG to function SM/sinusoidal_analysis.m to select partial tracking algorithm
• Added high-level function SMT/partial_interpolation.m

Backwards compatibility in version 0.3.0-alpha.1

• New harmonic selection feature resulted in API changes to high-level functions inside the folder SM/
  • Additional input arguments in a different order in function SM/sinusodal_analysis.m
  • Different order of input arguments in function SM/sinusoidal_analysis.m
  • Additional arguments in function SM/sinusoidal_resynthesis.m
  • Different order of input arguments in function +tools/+harm/harm_peak_sel.m

Bug fixes in version 0.3.0-alpha.1

• Fixed bug in function +tools/+harm/harm_peak_sel.m

SMT 0.2.0-alpha.1

Sound Morphing Toolbox (SMT) version 0.2.0 alpha release build 1

What's new in version 0.2.0-alpha.1

• Fully vectorized sinusoidal analysis
• Vectorized sinusoidal resynthesis
• Namespace +STFT for the short-time Fourier transform
• Namespace +tools for the core functions
• Refactored codebase into low-level core functionality and high-level calls to core functions
• Added support for power scaling spectral estimation of sinusoidal parameters
• Standardization of nomenclature of entire codebase
• Refactored and restructured partial tracking
• Updated functions in folder +tools/+spec/ to also handle odd FFT size

New functions/features in version 0.2.0-alpha.1

• Function SM/freq_matching.m was completely refactored into several local functions called as subroutines
• Partial tracking step has a dedicated function SM/partial_tracking.m, which calls the functions SM/peak2peak_freq_matching.m and SM/freq_matching.m
• Introduced power scaling sinusoidal parameter estimation in functions XQIFFT/xqifft.m and XQIFFT/interp_pow_scaling.m
• Added functions tools.sin.is2ptpeak.m, tools.sin.is3ptpeak.m, tools.sin.ispeak.m
• Added function tools.math.quadfit.m with improved implementation of quadratic fit that also handles symmetrical spectral peaks
• Introduced subroutine SM/parameter_estimation.m
• Updated function SM/peak_picking.m inside parameter estimation to handle regular and symmetrical spectral peaks
• Updated all functions in folder +tools/+spec/ to be able to handle even or odd size of the DFT

Deprecated functions/features in version 0.2.0-alpha.1

• Several functions became deprecated and were replaced

Bug fixes in version 0.2.0-alpha.1

• Several bug fixes

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SMT 0.1.1

Sound Morphing Toolbox (SMT) version 0.1.1

What's new in version 0.1.1

• Added CMMR2019 folder
• Added auxiliary plotting functions CMMR2019/CMMR2019_makefigsinres.m and CMMR2019/CMMR2019_makefigpeaktrack.m

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SMT 0.1.0

Sound Morphing Toolbox (SMT) version 0.1.0

What's new in version 0.1.0

• Initial release

Acknowledgements for SMT 0.1.0

This work was financed by National Funds through the Portuguese funding agency, FCT - Fundação para a Ciência e a Tecnologia within grant SFRH/BPD/115685/2016.