Mantra 8

अथ यदि गीतवादित्रलोककामो भवति संकल्पादेवास्य गीतवादित्रे समुत्तिष्ठतस्तेन गीतवादित्रलोकेन सम्पन्नो महीयते ॥ ८.२.८ ॥

In plain words

And if he desires the world of song and music, then by his mere resolve song and music rise up; and gaining that world of song and music he is magnified.