ValueError: scale < 0

[JetteReeg]

Hi @kahst,
I have been using the BirdNET Docker for a few weeks now (on my local machine and also on a HPC cluster) and actually never had a problem. Now I wanted to analyse a larger set of wav-files (several 12h recordings, saved as 15min files).

Unfortunately I get an error message for a lot of the files (but not all).

My command for analysing the files is:
docker run -v F:/jreeg/MakroOeko/BirdNET/example:/audio birdnet --i audio/SMU02869_20210921_213002.wav --lat 52.73379 --lon 12.21099

BirdNET output:

FILES IN DATASET: 1
LOADING SNAPSHOT BirdNET_Soundscape_Model.pkl ... DONE!
BUILDING BirdNET MODEL... DONE!
IMPORTING MODEL PARAMS... DONE!
COMPILING THEANO TEST FUNCTION FUNCTION... DONE!
LOADING eBIRD GRID DATA... DONE! 13800 GRID CELLS
SID: 1 PROCESSING: SMU02869_20210921_213002.wav SPECIES: 201 Traceback (most recent call last):
File "./analyze.py", line 292, in
main()
File "./analyze.py", line 288, in main
process(s, dataset.index(s) + 1, result_path, args.results, test_function)
File "./analyze.py", line 219, in process
p = analyzeFile(soundscape, test_function)
File "./analyze.py", line 182, in analyzeFile
duration=None):
File "/utils/audio.py", line 233, in specsFromFile
for spec in specsFromSignal(sig, rate, **kwargs):
File "/utils/audio.py", line 217, in specsFromSignal
sig_splits = splitSignal(sig, rate, seconds, overlap, minlen)
File "/utils/audio.py", line 208, in splitSignal
split = np.hstack((split, noise(split, (int(rate * seconds) - len(split)), 0.5)))
File "/utils/audio.py", line 27, in noise
noise = RANDOM.normal(min(sig) * amount, max(sig) * amount, shape)
File "mtrand.pyx", line 1501, in numpy.random.mtrand.RandomState.normal
File "_common.pyx", line 557, in numpy.random._common.cont
File "_common.pyx", line 366, in numpy.random._common.check_constraint
ValueError: scale < 0

I only get this message for some of the audiofiles (which have the same recording settings and location, the only difference is the timestemp of the day).

Do you have any idea what causes this error message?