Faint sound from speaker at all times

I’ve had my Rhasspy setup for a few months now and it’s been working great.

Recently there has been a faint sound coming from the speaker whenever Rhasspy is running, it sounds kind of like steam escaping from a covered pot. Unfortunately it’s just loud enough to be super annoying, as the setup is on my desk.

I’m not sure where to look for the source of this. :man_shrugging:

Rhasspy 2.4.19
Raspberry Pi 4
Raspiaudio MIC+ (https://www.raspiaudio.com/raspiaudio-aiy)

    "command": {
        "webrtcvad": {
            "timeout_sec": 15,
            "vad_mode": 3
    "mqtt": {
        "enabled": true
    "wake": {
        "snowboy": {
            "apply_frontend": true,
            "model": "snowboy/jarvis.umdl",
            "sensitivity": "0.8,0.80"
        "system": "snowboy"