וַיַּעֲל֤וּ כָל־הָעָם֙ אַֽחֲרָ֔יו וְהָעָם֙ מְחַלְּלִ֣ים בַּחֲלִלִ֔ים וּשְׂמֵחִ֖ים שִׂמְחָ֣ה גְדוֹלָ֑ה וַתִּבָּקַ֥ע הָאָ֖רֶץ בְּקוֹלָֽם׃
И все люди пришли за ним, и люди паялись трубами, и радовались с великой радостью, так что земля раздиралась от их звука.
Ralbag
piped with pipes: This means that they were playing flutes. These are musical instruments, like in appearance to reeds, and they are pierced at intervals to give forth particular notes.
Rashi
And the earth [seemed to] split. Prophets spoke in terms of exaggeration as [is common] among people.35see Maseches Chulin 90b.