YOU SAID:
I'm a piano out of tune. I'm a poorly strung guitar
INTO JAPANESE
私は調律が悪いピアノです。私はギターの張りが悪いです
BACK INTO ENGLISH
I have a bad tuning. I have a bad guitar tension
INTO JAPANESE
チューニングが悪いです。ギターの張りが悪い
BACK INTO ENGLISH
The tuning is bad. The guitar is not tight
INTO JAPANESE
チューニングが悪いです。ギターはタイトではありません
BACK INTO ENGLISH
The tuning is bad. The guitar is not tight
That didn't even make that much sense in English.