Shared ground
Deuteronomy 31:30 functions as a narrative doorway into the longer “Song of Moses” in the next chapter. The verse is not mainly about the song’s message yet, but about how Moses delivers it: it is spoken aloud, to a gathered public audience, as a complete, intact piece.
The text’s explicit claims emphasize accessibility and communal receipt. Moses speaks “in the hearing” of “all the assembly,” and he continues until the words are finished. The song is presented as something the community is meant to hear together, not as scattered comments or a private note.
Where interpretation differs
Two modest questions affect how people picture the scene.
First, some read “song” as clearly poetic and intentionally crafted for memory and repetition, which fits the broader role of songs in communal teaching. Others take “song” more broadly as a formal public recital that may or may not be “sung” in the way modern readers imagine.
Second, “all the assembly” can be taken as every individual present, or as an idiom for a full, representative national gathering (including leaders and households). Either way, the point remains that the audience is the community, not a restricted inner circle.
Why the disagreement exists
The verse is brief and focuses on audience and completion rather than describing performance details. Phrases like “in the ears of” and “all the assembly” can be literal or conventional ways of speaking about public proclamation.
What this passage clearly contributes
This verse frames the Song as authoritative teaching delivered publicly and received as a whole. It supports the idea that Israel’s covenant instruction was intended to be heard and held in common, using a form (“song”) suited to shared memory and transmission (compare the following continuation in Deuteronomy 32:1).