[EDGE CASE] The sound of some musical instruments is recognized as a voice.

[flutomax]

🐛 Bug

During the tests, it was revealed that the sounds of musical instruments of the string group, such as the piano and guitar, cause false alarms, considering the input signal to be a voice.

To Reproduce

Steps to reproduce the behavior:

1. Get a test audio example from here
2. Build and run an example examples/main.c
3. Make sure that speech is detected in the places where the piano sounds.

Expected behavior

Speech should be detected between 3.5 s and 4.6 s.

[Ziyi6]

Hi, the frequency spectra of musical instruments, such as piano, and human voices exhibit similar characteristics, including clearly visible fundamental frequencies (F0) and harmonic structures. This spectral similarity poses significant challenges for VAD systems - both our TEN VAD and solutions like Silero VAD inevitably encounter false positives.

We recommend you to use a (AI) Noise Reduction algorithm to filter out these kind of noise.