Yep, that is really completely bonkers… it’s not that the signal suddenly drops out, it properly fades out. Well, nearly, there is some kind of weird distortion in the fade out.
I cannot begin to imagine how that could be an problem inside Cubase, though. I mean, a fade out based on some frequency? Cubase (or whatever else) would have to do a detection of the fundamental note first, like a tuner.
I am wondering if that is not a red herring… Did you record the exact same phrase into Quicktime?
The note in your file is a “b3”. Is that the pitch where the effect always happens? Say if you sing the f major scale from “f3” upwards, with all the notes sung the same way and length, is the “b3” always the point where the issue happens?
If possible, can repeat the same test with something else you can record, maybe an instrument?
Or maybe a better setup would be using a sine sweep (a sine wave that rises in pitch from 20-20Khz). This is often used for testing audio, as it removes a lot of variables from testing and is a consistent, precisely reproducible test.
- use Sweep Tone Generator Online Free Web App Tool, Download Sounds in WAV to generate a sine sweep (20-1000Hz for 30 seconds should be ok), download that.
- import that file into an empty project. set the output routing of that track to a free line output of your audio interface (if you have none, unplug your monitors and use one of those.
- plug a cable from that line out to a line input in of your interface.
- create a new track in the project with the input set to that line in, set the track to record enable
- hit record. the sine sweep should go to the line out back to the ine in and be recorded on that new track
If you have another computer or smartphone/tablet which you can connect to the line input of your interface, you can also use that and play the sweep directly from the web site.