fzyukio/koe: April 2021 Release

New stuff

• Spectrograms are now paged (stored separately in folders not exceeding 1000 spectrograms each) so the load time is vastly improved
• Features can now be aggregated by min, max, var, begin and end values
• Added parameters to database model which can be set at the creation of the database, or changed in database management
• Change feature extraction to use database's specific NFFT and overlap
• Spectrogram preferences (colour map, zoom, etc...) are now saved - no need to change them each time you open a new file
• Spectrogram now has y-axis
• Added script to export koe syllables to Excel, including spectrogram
• Apply bandpass filter in feature extraction
• Make Koe compatible with Python 3.9, Mac Big Sur, and Apple Silicon (must use conda-forge)
• Koe's docker images are now truly handsfree, no more messing with project settings on-site

• Fixed various problems with spectrograms not being generated when importing CSV
• Fix inconsistency in file's sampling rate across: original WAV, converted MP3 and Browser's default sampling rate
• Use 2 decimal points for segment start and end times
• Fix bug: end_ms > duration
• Fix various bugs when upload raw recording
• Fix fundamental frequency not returning correct value when the database has bandpass filter