A full bench of the Supreme Court answer the references before it in the following way…

From Paras 5 and 6,

5. Two principal questions arose for determination of the appeal which have been set out in the order of Justice Ranjana Prakash Desai dated 7th December, 2012 in the following terms.
“(1) Whether Article 20(3) of the Constitution of India, which protects a person accused of an offence from being compelled to be a witness against himself, extends to protecting such an accused from being compelled to give his voice sample during the course of investigation into an offence?
(2) Assuming that there is no violation of Article 20(3) of the Constitution of India, whether in the absence of any provision in the Code, can a Magistrate authorize the investigating agency to record the voice sample of the person accused of an offence?”
6. While the first question was answered in the negative by both the learned Judges (Justice Ranjana Prakash Desai and Justice Aftab Alam) following the ratio of the law laid down in State of Bombay vs.Kathi Kalu Oghad1, difference of opinion has occurred insofar as second question is concerned.

From Para 10,

10. We may now proceed to answer the second question, namely, whether in the absence of any specific provision in the Cr.P.C. would a Court be competent to authorize the Investigating Agency to record the voice sample of a person accused of an offence. We are told that no authoritative pronouncement of this Court has been rendered by this Court.

From Para 12,

12. None of the said amendments specifically authorize or empower a Magistrate to direct an accused person or any other person to give his/her voice sample for the purposes of an inquiry or investigation under the Code. “Omission” of the Legislature to specifically so provide has led the learned judge (Justice Aftab Alam) on the two judge Bench to doubt as to whether legislative wisdom was in favour of a specific exclusion or omission so as to make a judicial exercise through a process of interpretation impermissible.

Finally, from Paras 24 and 25,

24. Would a judicial order compelling a person to give a sample of his voice violate the fundamental right to privacy under Article 20(3) of the Constitution, is the next question. The issue is interesting and debatable but not having been argued before us it will suffice to note that in view of the opinion rendered by this Court in Modern Dental College and Research Centre and others vs.State of Madhya Pradesh and others11, Gobind vs. State of Madhya Pradesh and another12 and the Nine Judge’s Bench of this Court in K.S. Puttaswamy and another vs. Union of India and others13 the fundamental right to privacy cannot be construed as absolute and but must bow down to compelling public interest. We refrain from any further discussion and consider it appropriate not to record any further observation on an issue not specifically raised before us.
25. In the light of the above discussions, we unhesitatingly take the view that until explicit provisions are engrafted in the Code of Criminal Procedure by Parliament, a Judicial Magistrate must be conceded the power to order a person to give a sample of his voice for the purpose of investigation of a crime. Such power has to be conferred on a Magistrate by a process of judicial interpretation and in exercise of jurisdiction vested in this Court under Article 142 of the Constitution of India. We order accordingly and consequently dispose the appeals in terms of the above.

Citations: [2019 INSC 855]

Other Sources:

https://indiankanoon.org/doc/18061439/

https://www.casemine.com/judgement/in/5d5259333321bc4b5e57ce07

https://www.indianemployees.com/judgments/details/ritesh-sinha-vs-the-state-of-uttar-pradesh-anr

https://www.nayalegal.com/ritesh-sinha-v-state-of-up-2019