• dundubhayaḥ — kettledrums
  Divine drums. Their resounding is a stock marker in the Bhāgavatam that something cosmically significant has happened. Gauḍīyas read dundubhi-sounding as the universe's applause.
• vyomni — in the sky
  Locative of vyoman (sky, space). The sky is the venue for the supernal audience. Vraja's līlā is double-decked: human-level ground action and deva-level sky reaction.
• kusumaiḥ — with flowers
  Instrumental plural of kusuma (flower). Puṣpa-vṛṣṭi — flower-rain. Gauḍīyas note that flower-rain consistently marks Bhagavān's victories and līlā-climaxes; it is the cosmos's anubhāva.
• munayaḥ — the great sages
  Plural of muni. Sages whose stock-in-trade is silence here engage in praise. Gauḍīya reading: even silence-keepers cannot help speaking when līlā passes near; bhāva overrides vow.
• tat - vīryaiḥ — with His heroic deeds
  Compound: tat (His) + vīrya (potency, heroism). The same vīrya the next sections will demonstrate against the Yamunā. Vīrya is the link-word between mādhurya episodes and aiśvarya episodes.

When the right kind of pastime is unfolding on earth, the sky itself sets up its instruments — drums, flowers, chants — without being asked. The cosmos has a stage crew, and they show up automatically for līlā that matters.