या वाक्सर्क्तस्मादप्राणन्ननपानन्नृचमभिव्याहरति यर्क्तत्साम तस्मादप्राणन्ननपानन्साम गायति यत्साम स उद्गीथस्तस्मादप्राणन्ननपानन्नुद्गायति ॥ १.३.४ ॥
In plain words
What speech is, that is the Ṛc; therefore one utters a verse of the Ṛc while neither breathing out nor breathing in. What the Ṛc is, that is the Sāman; therefore one sings the Sāman while neither breathing out nor breathing in. What the Sāman is, that is the Udgītha; therefore one sings the Udgītha while neither breathing out nor breathing in.
The commentators
Chāndogyopaniṣadbhāṣyam· Leaf 6.213· avatāraṇikā
या वाक्सर्त्तस्मादप्राणन्नपानन्नृचम
In plain words
That speech which one utters without exhaling or inhaling...
Close to the Sanskrit
Which speech, he from that, without exhaling and without inhaling, [utters] the ṛc hymn...
Chāndogyopaniṣadbhāṣyam· Leaf 6.214· bhāṣya
तथा वाग्विशेषामृचम्, ऋक्सस्थ च साम, सामावयव चोद्गीथम्, अप्राणन्नपानन् व्यानेनैव निर्वर्तयतीत्यभिप्राय ॥
In plain words
In this way, speech brings forth the specific ṛc, the sāman rooted in the ṛc, and the udgītha as a limb of the sāman, accomplishing them solely through vyāna without exhalation or inhalation—this is the intended meaning.
Close to the Sanskrit
Thus speech [manifests] the particular ṛc, and the sāman rooted in the ṛc, and the udgītha as a limb of the sāman, accomplishing [them] precisely through vyāna without exhaling and without inhaling—such is the intent.