Windows 10: Why is my laptop audio crackly for low pitch audio?

I've noticed that since I installed a recent optional windows update on my Windows 10 laptop about a month ago, my laptop's speaker become a little crackly when playing audio that is low pitched or audio from a deep voice.I have no problem listening to higher pitched audios, but audios like those from a deep voice are quite difficult to hear due to the choppiness, which is troublesome as I find it difficult to listen to my professors' lectures.I've noticed this crackly audio comes primarily from the left side of the speaker on my laptop I've noticed the left speaker plays low pitch sounds l

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Crackly Webcam Microphone

HP Envy Laptop (64) on Windows 10. My webcam mic is extremely crackly on the Camera Video app and on Audacity audio recording playback and yet my Skype partner says it is OK quality though she says it has been crackly and poor in the past. If I check
output on the meter it is low compared with LifeChat LX3000.

 

Lower audio pitch

My computer audio's been at a lower pitch across all playback devices. I've tried updating my audio drivers and troubleshooting audio, both did not fix the issue.

 

Crackly Airpod's audio

Hello, I have made the same question like this a couple of days ago about my Airpod's audio problem. My Airpod's have this weird audio problem where every 10-20 seconds it makes a weird crackly, annoying sound. The person who answered my question before
did solve my problem, which was updating the drivers. But after a day, the annoying sound came back again. I have tried to repair my Airpods many times and restarted my computer, but I still experience the sound. Is there any way for this sound to stop?