With a bunch of cats meowing whenever the music stopped. Heh-heh.

9 seconds sound clip from Batman (1966) - Hot Off the Griddle (S2E3) TV Series.

You can hear this line at 00:17:15 in the Blu-ray version of the movie.

Quote context

[...]

- They pick me up at my swank one room apartment, blindfold me, then take me to her place.

- Any clues as to where it is?

- All I know is that I heard rock 'n' roll music in the background whenever I go to one of her lectures.

- Lessons in larceny. How despicable.

- And I used to hear a lot of people marching on the floor above my head.

- With a bunch of cats meowing whenever the music stopped. Heh-heh.

- Oh, yeah, one other thing.

- Whatever her caper is, she plans it for tonight.

- Very well. Take him away, Chief O'Hara.

- It's 10 a.m. If we're to figure out her plot, we better shake a boot. Let's go.

[...]