graph TD
A1[Personnal <span>Recording</span>] -->|<center>record with <br>smartphone</b></center>| B(<center>Name the file <br>as shown below</br></center>)
A2[Youtube recording] -->|<center>Download mp3 <br>with mp3fy</br></center>| B
B --> C(Upload file to the dropbox)
C -->D1[<center>Sound Processing <br>and preparation</br></center>]
D1 -->D2[<center>Verification and <br>allocation of SoundClasses</br></center>]
style A1 fill:#ef0,stroke:#333,stroke-width:2px;
style A2 fill:#ef0,stroke:#333,stroke-width:2px;
style B fill:#ee6,stroke:#333,stroke-width:2px;
style C fill:#eb6,stroke:#333,stroke-width:2px;
style D1 fill:#ea6,stroke:#333,stroke-width:2px;
style D2 fill:#e96,stroke:#333,stroke-width:2px;