Wav file playback issues

I’ll start off by saying I know little to nothing about digital audio.
I am, however, a programmer.
I wrote a short script to create new audio files for Lackey’s vtes plugin using gtts.
The wav files sound great when played by vlc, or my own code, but when Lackey plays the files they seem to “crack” and get noisy at their loudest peaks (if that makes any sense).

Is anyone savvy enough to give insight into why this happens? Is it something I’m doing wrong when writing the audio format, or is Lackey a bit wonky with certain audio files?

My guess: Sounds like a compression issue. I would import the audio files into a audio editor, look at the waveform, and selectively lower the peaks where needed. Adjust levels and such. You should be able to see where it's peaking and the decibel level, and my guess is that Lackey + compression is causing your peaks to be cut off, resulting in the static and cracks you hear.

Sounds like a lot of work.
What’s the technical way of describing what’s wrong with the files?
If I know what to tweak, I can adjust my software instead.
Are they too loud? Frequencies too high+low?

I figured it out.
The output frame rate of my audio was 24'000Hz, while Lackey's own files are 22050Hz. After adjusting the frame rate they sound okay