メトロノームでしょう
metoronōmudeshō
1. Probably a metronome.
★ Common
Noun
#35138
1. Probably a metronome.
1. metronome
1. it seems; I think
2. right?; don't you agree?
1. If metronome; When metronome
1. It was not a metronome.
1. Not a metronome.
1. Wasn't a metronome.
1. It was a metronome.
1. If/when a metronome; Provided a metronome is present
1. Wasn't a metronome.