warbling

He heard a pair of water rails (Rallus aquaticus) warbling from the lake beyond a grove, and he said with the voice of a commentator on a recording of wild birds: "They are water rails".

Kenzaburo Oe - Nobel Lecture 1995

That is called warbling, or trilling, or trolling, or something.

Peck's Uncle Ike and The Red Headed Boy 1899 1878

One person noticed "warbling" in the background, that is likely the binaural beat that is encoded into the background music.

Hypnocast . . . audio weirdness 2005

One person noticed "warbling" in the background, that is likely the binaural beat that is encoded into the background music.

Life of Brian: 2005

He utters his usual notes at all times of the year; but in the early part of summer he is addicted to a very low but pleasant kind of warbling, considerably varied, and wanting only more loudness and precision to entitle him to a rank with the singing-birds.

The Atlantic Monthly, Volume 03, No. 17, March, 1859 Various

Comments: I can't remember anything about this one other than "warbling" which I've written in my notes next to it.

Everything2 New Writeups 2010

Danny belted out the chorus, "He might be thinking of things that might have been," warbling "might" through three different notes and holding out "been" on a long, high note of missed opportunities.

Baltimore City Paper 2009

Danny belted out the chorus, "He might be thinking of things that might have been," warbling "might" through three different notes and holding out "been" on a long, high note of missed opportunities.

Baltimore City Paper 2009

Eduardo Miranda shuts the door of his study, leaving two "warbling" robots to their own devices.

Reason Magazine - Hit & Run 2008

Sure, viewers sit through season after season of God-awful warbling on DioGuardi's old show American Idol, but on Platinum Hit, contestants are not only shaky singers, they're all performing their own half-baked, unproven material.

Kara DioGuardi on Platinum Hit's Bad Singing Problem, Plans for More Post-Idol TV 2011