Do listen to a few and choose one you feel drawn to.

    Namo Amida Bu (prostrations chant)
    Namo Quan Shi Yin Bosat
    Om Mani Padme Hum Hrih
    Om Ami Dewa Hrih
    Namo Amida Bu from kirtan, sung by Angela Pell-Walpole

    Some other recordings of liturgy

    Prajnaparamita Hridaya Sutra p20 (the text is wrong in places – I learnt this using the resources here & here)
    The Heart Sutra in Japanese