'Distinction' in the Bible

and he made no distinction between them and us, cleansing their hearts by faith.

namely, the righteousness of God through the faithfulness of Jesus Christ for all who believe. For there is no distinction,

For there is no distinction between the Jew and the Greek, for the same Lord is Lord of all, who richly blesses all who call on him.

It is similar for lifeless things that make a sound, like a flute or harp. Unless they make a distinction in the notes, how can what is played on the flute or harp be understood?