The Taittiriya Upanishad with an introduction from Sri Aurobindo, along with Sanskrit recitation by Sri Vinayak and the English translation recited by Santosh Krinsky, produced in 1973 at Sri Aurobindo Ashram
reference: https://www.lotuspress.com/products/upanishads-1st-us-edition-990360?_pos=2&_sid=bed198415&_ss=r
Extensive review and commentary of Sri Aurobindo's The Upanishads is available at http://sriaurobindostudies.wordpress.com
More information about Sri Aurobindo can be found at http://www.aurobindo.net
The US editions and links to e-book editions of Sri
Aurobindo’s writings can be found at http://www.lotuspress.com
Sri Aurobindo Studies