Strange looking waveforms

I've received vocal stems from a client. Some of the waveform look strange but sound fine. Does anyone know why this is?

 

 

What's strange about them? That they have sections that are not very dynamic? Try zooming in. What is that part, a synth pad or something?

No exactly, it looks like a synth but its a vocal. The top 2 tracks should look like the bottom track (also a vocal). Even when there is silence there is still that blocky waveform

Its strange. There is definitely something different with this audio because Melodyne is detecting it as percussion and therefor not automatically sensing it is a vocal. I have to go in and change the setting to get it to realise it is melodic audio. All the other vocal tracks that look normal in Logic also import normally into Melodyne and are detected automatically a melodic content.

There's not a lot I can say from a low res zoomed out screenshot. Can you post some more zoomed in screenshots, and preferably a piece of the original audio file?

Zoomed in looks exactly like the zoomed out waveform. That’s why I included a normal waveform at the bottom. That’s what the top 2 vox should look like but they don’t. I’ve experienced this before in Logic and don’t know why

Do you think it's a graphical bug then and the waveform display is wrong?

 

What happens if you import the same audio into another track?

What happens if you bounce out the audio from Logic and import that into another track?

I’ve tried importing the same track into Logic a number of times. It’s importing as rhythmic audio into Melodyne instead of melodic so there’s obviously something fundamentally wrong with the file

This happened to me. I though there was noise in the recording. I don't remember exactly but I think I have exported from other DAW and imported files again and it got solved.

Is your zoom waveform button engaged at the top right of the Tracks area?

That looks like either noise or DC offset to me. This is what I get if I boost a very quiet recording.

Could you try to refresh the waveform from the audio bin and see if that corrects the display issue....

 

That looks like either noise or DC offset to me. This is what I get if I boost a very quiet recording.

Indeed. To illustrate what Eriksimon said, I recorded an empty audio region, boosted the gain to 30 dB and zoomed the waveform with the waveform zoom button.