Microphone not picking up audio

[blackears]

Tested versions

v4.5.stable.official [876b290]

System information

Godot v4.5.stable - Windows 11 (build 26100) - Multi-window, 2 monitors - Vulkan (Mobile) - dedicated NVIDIA T1000 8GB (NVIDIA; 32.0.15.7344) - Intel(R) Core(TM) i7-14700 (28 threads) - 15.69 GiB memory

Issue description

I'm writing a spectrum analyzer component for showing the wave pattern of an audio stream. This project was partially working under Godot 4.4.1, but after upgrading to Godot 4.5 it does not work at all.

In 4.4.1, the project worked on desktop, but failed after running for about a minute on Android. (#106143)

In 4.5, the app seems to not pick up audio at all, even when running on desktop.

Steps to reproduce

Run app in debugger window from editor on a computer with a connected microphone. Make some sounds. Notice that nothing is displayed.

Minimal reproduction project (MRP)

pitchviewerbug2.zip

[vidaliATWIT]

@blackears Yeah there's something definitely weird about this. I assume the expected behavior is supposed to be a spectrum roughly representing the audio coming in right?

I found that if I set my input gain loud enough, you can get it to react, but I don't believe its strictly correct.

I should note you can definitely hear the audio loud and clear, so the audio input is fine.

[blackears]

Yes, the idea is to display the spectrum. The bars seemed a bit too wide when I was running it on 4.4.1 - not sure if that is due to my math or if SpectrumAnalyzer's get_magnitude_for_frequency_range method is sampling outside of the specified range. However, it was good enough to visualize an approximation of the waveform.

[vidaliATWIT]

@blackears Noted, what object is actually doing the reading/processing to display as a spectrum? The audio input itself is working fine. I'm theorizing the issue is with whatever is processing it.

[blackears]

Okay, I just ran it again and now it seems to be working. Not sure why I was getting no response earlier. Perhaps it was the upgrading or maybe I accidentally changed something that fixed it.

Sorry for bothering you with this.

---

The _process method of main.gd is reading the spectrum and sending a PackedFloat32Array of the results to %histogram_display to actually display the data.

[vidaliATWIT]

@blackears Great! And no problem at all. Happy it's working!

I'll see if we can get the issue closed.