No. Initiation is required only if you want to do mantra sadhana, not for listening. You just have to listen to the mantras we provide to get benefited.
नमस्ते कलपवृक्षाय चिन्तितार्थप्रदाय च ।
विश्वम्भराय देवाय नमस्ते विश्वमूर्तये ॥
namaste kalapa vri'kshaaya chintitaarthapradaaya cha .
vishvambharaaya devaaya namaste vishvamoortaye ..
Salutations to Kalpavriksha, the fulfiller of desires,
To the sustainer of the universe, the divine form,
Salutations to the one embodying the cosmos.