In the great void called viśuddhi, the sound of the heavenly drum instantly arises.Then the perfection of kumbhaka is achieved;then the great void arises.

This verse describes specific experiences of the ghaṭa stage.When the energy reaches viśuddhi cakra (the throat), called here atiśūnya (beyond emptiness), tūrya-ninādaka — the sound of the divine drum, different from the various sounds of the previous stage — is heard.

The perfection of kumbhaka (kumbhaka-siddhi) manifests: retention becomes natural, effortless, potentially limitless.It is not forced retention but spontaneous suspension of breath that occurs when prāṇa and apāna are perfectly balanced.

The term mahāśūnya (great emptiness) indicates a deeper experience of emptiness than the śūnya of the first stage.The Bihar School distinguishes levels of emptiness: each more subtle, each revealing deeper layers of consciousness stripped of content.Viśuddhi, the center of purification, is where the nectar of immortality (amṛta) drips from bindu.The yogi experiences states of unusual purity and clarity here.