At least 50+ years old audio recording of Shrimat Paramahansa Parivrajakacharya Sadguru Bhagwan Shri Shridhara Swami Maharaj giving a Pravachana in Kannada on the topic of 'Guru Tatva'.

Free Android app on Shri Swamiji https://shridharsahitya.wordpress.com...
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Many thanks to Shri Srivatsa N.S of Bangaluru for sharing this audio.