  _______ _    _   _____                    _            
 |__   __| |  | | |  __ \                  | |           
    | |  | |  | | | |  | |_ __ ___  ___  __| | ___ _ __  
    | |  | |  | | | |  | | '__/ _ \/ __|/ _` |/ _ \ '_ \ 
    | |  | |__| | | |__| | | |  __/\__ \ (_| |  __/ | | |
    |_|   \____/  |_____/|_|  \___||___/\__,_|\___|_| |_|
                                                         
                                                         

This archive contains supplemental materials for 
Stone and Birkholz - "Articulatory synthesis of German primary diphthongs using monophthong vocal tract shapes" (2022).

The archive has the following structure

Supplemental Material.zip
├── data                                        // Formant data
    ├──DiphthongFormantData.csv                 // Formant frequencies measured in the audio recordings of the speaker
    └──MonophthongFormantData.csv               // Formant frequencies of the monophthong vocal tract shapes provided by VocalTractLab
├── results                                     // Raw results of the listening experiment
    ├── headphones_screen.csv                   // Results of the headphones screening test
    └── preference_test.csv                     // Results of the preference test
├── scripts                                     // Auxiliary scripts
    ├── normalize_and_upmix.py                  // Script to normalize the loudness of the stimuli and upmix the mono files to stereo
    └── pref.yaml                               // Configuration file used for the webMUSHRA platform
├── stimuli                                     // Stimuli used in the listening experiment
    └── ...                                     // See below for naming scheme
├── Study on German Primary Diphthongs.ipynb    // Jupyter notebook to reproduce the findings from the study
└── README.txt					                        // This readme file

Naming scheme for the stimuli in the listening experiment:

<diphthong>-<sentence>-<initial>-<final>.wav

<diphthong>:      Phonemic diphthong in SAMPA notation (aI, aU, or OY)
<sentence>:       Graphemic transcription of the carrier sentence
<initial>:        Vocal tract shape used for the initial segment of the diphthongs
<final>:          Vocal tract shape used for the final segment of the diphthongs