"Play music at the party."
Translation:E kani ka pila i ka pāʻina.
What's the difference between "ma ka pāʻina" and "i ka pāʻina"? This exercise requires "i". The exercise with feeding kids at the party requires "ma".
For the uses that you mentioned, "i" and "ma" are interchangeable. Both should be accepted now.
1 nviSound or noise of any kind; pitch in music; to sound, cry out, ring, peal, jingle, tinkle, toll, whir, resound, reverberate; roar, rumble, crow, resonance; to strike or tick, of a clock, to sing, as birds; voiced. Cf. leokani. [PPN tangi] ke kani ʻana o ka leo the sound or tone of the voice, intonation kani nā pele jingle bells kani ka pila play music kani ʻōkalakala screech Kani ka moa. The rooster crows. kani ā hiaʻā to grieve and moan so sorrowfully that one cannot sleep kani ā ʻuʻina flash of lighting followed immediately by a peal of thunder leo kani sweet or pleasant voice Mākaukau, kī, kani! Ready, aim, fire! kani ka papa waʻa the canoe floor sounds [a poetic expression applied to aged persons just before death, as the dead were sometimes laid in canoes which were placed in burial caves] ʻUmi minuke i koe, kani ka hola ʻewalu. Ten minutes before eight; Lit. ten minutes remaining strikes the hour eight. Ua pūhā kēia lāʻau, ke kani ʻia ala e ka manu. This tree is rotten, [it] is being made to sound by the bird [said of a tree not suitable for a canoe: see ʻelepaio 1].