YOU SAID:

An accidental played on purpose

INTO JAPANESE

意図せずに偶然演奏した

BACK INTO ENGLISH

I accidentally played it unintentionally

INTO JAPANESE

私は間違ってそれを誤って演奏した

BACK INTO ENGLISH

I mistakenly played it wrong

INTO JAPANESE

私は間違ってそれを間違って演奏した

BACK INTO ENGLISH

I mistakenly played it wrong