Nityananda! Gauranga! Hare Krishna! Jaya Shri Guru Parampara! Pranams! 
I just posted an audio comment here with the proper pronunciation of the Nityananda, Gauranga, and Hare Krishna Mantras and an explanation about which can possibly be the incorrect pronunciations. I am posting this just incase you miss that comment.
Daaso'smi, Swami Gaurangapada.
Nityananda! Gauranga! Hare Krishna! Jaya Shri Guru Parampara! Pranams! Some devotees find it difficult to sing the longer Pancha Tattva Mantra in the normal and basic tunes in which we sing the Nityananda, Gauranga and Hare Krishna Mantrarajas since the Pancha Tattva Mantra has more syllables in the second line and thus the Mantra does not fit in normal kirtana tunes like the famous Swami tune of Shrila Prabhupada. Thus, they directly begin the kirtana with the Hare Krishna Mahamantra. But the Pancha Tattva Mantra and the Names of the Pancha Tattva should never be neglected in the beginning of any Naam Sankirtana or Naam Japa otherwise the Hare Krishna Naam may not yield the desired benefits. To remind everyone, the Pancha Tattva Mantra is as follows:
shri krishna chaitanya, prabhu nityaananda
shri advaita gadaadhara shrivaasaadi gaura bhakta vrinda
If the Pancha Tattva Mantra does not fit in the Naam Kirtana tune which is going to be sung, it should still be vocally recited (chanted without music) audibly three times or at least one time before beginning the chanting of the kirtana of even Nityananda Gauranga Naam and of course Hari Naam. The Pancha Tattva Mantra contains the remembrance of the most merciful Gaura Bhakta Vrinda by whose mercy we chant the Holy Name of Nityananda. And by the mercy of Nityananda Naam, we are able to vibrate Gauranga Naam. And by the mercy of all these Naam, we are finally able to utter the Hare Krishna Mahamantra in a pure offenseless manner.
In addition (not replacement) to chanting the Pancha Tattva Mantra, those devotees who want to sing the kirtana of all the Holy Names of the Pancha Tattva even more frequently in the normal Naam kirtana tunes in which the Pancha Tattva Mantra does not fit can sing the Pancha Tattva Stava which is the first verse of the Nityananda Gauranga Naam Mahima Mahastotra. The Pancha Tattva Stava is based on the verses of Shri Chaitanya Charitamrita. It can easily be sung in all the tunes in which sing Nityananda, Gauranga and the Hare Krishna Mantras are normally sung. It is as follows:
shri gauraanga nityaananda, advaita chandra
gadaadhara shrivaasaadi, gaura bhakta vrinda
Thus, by the help of these two, Pancha Tattva Mantra and Pancha Tattva Stava, the Holy Names of the most magnanimous Pancha Tattva should always be sung and remembered before commencing any kind of Naam Bhajana (including Nityananda Gauranga Naam Bhajana) to remove all kinds of inauspiciousness. Please note, however, that the Pancha Tattva Stava does not replace the Pancha Tattva Mantra in any way. It is only a recommended complementary addition for those devotees who want to sing the Holy Names of Pancha Tattva in the normal and simple kirtana tunes. It is mandatory to chant or sing the Pancha Tattva Mantra in the beginning of Naam Bhajana irrespective of whether you are later going to sing the Pancha Tattva Stava or not since the Pancha Tattva Mantra is said to be given to us by Shrila Jagannatha Dasa Babaji himself. Chanting of the Pancha Tattva Stava is not mandatory and it is up to the devotee who is performing bhajana or kirtana to sing it or not.
Daaso'smi, Swami Gaurangapada.
