When a singer finishes a line, attention often waits for the next words. Try listening instead to the first sound that follows. A small instrumental response may become easier to hear when you treat the end of the vocal as a starting point.
Choose one phrase boundary
Play a short section and identify where the sung phrase ends. Then note what happens immediately afterwards: a brief melodic figure, a repeated pulse, a sustained sound, or a gap. Describe only what you can distinguish clearly.
Replay the same moment while listening slightly earlier. The sound you thought was an answer may already have been continuing beneath the voice. That distinction changes your description without making the first impression useless.
Compare another boundary
Find the end of a later line. Does the same pattern recur, or does the arrangement leave a different amount of space? Two examples are enough to begin noticing how the song distributes attention.
Use a timestamp when sharing the observation. You might say, “After this line I notice a short rising sound, but the next line ends over a continuing pattern.” The comparison gives another listener something specific to hear without requiring agreement about the mood or meaning of the passage.