The website Ved Puran is providing the opportunity to listen to the Rig Veda online in Hindi in mp3 format. The online audio version of the Rg Veda is the Hindi translation of the Rig Veda from Sanskrit. Pages from the Hindi translation book are also provided for reference.
You can read and listen to Rig Veda in mp3 here at Ved Puran.
Please note that the audio is available only in Internet Explorer browser.