Music Instruments used in temples

 
Musical instruments that are to be played during every invocatory 

prayers in temples are specified in the Pancharatra Agamas. 

The below given details are with respect to Vishnu temples.

Iswara Samhita says:

Jallari should be played for Vishnu;
Kahala for Saraswathi,
Mardala for Chandra,
Tantri for Gandharvas,
Harsva mardala for Bhu Devi,
Pataha for Lakshmi,
Kaamsya for Brahma.

This is the rule to be followed during dwajarohana

(hoisting of the flag) during Brahmotsava.

Paadma Samhita says that during pradosha and during
abhisheka, musical instruments must be played.

When the deity is being decorated (alankarasana), worship
through dance, veena and flute is required.
 

In his Nitya grantha, Ramanujacharya says that during
alankarasana, chinha, kaahala and beri must be played,
and dance must be performed.

When Brahmotsavam begins, the beri is struck. Once the
beri is sounded, no one should leave the town until the
Brahmotsavam concludes.

Nine talas are mandated for beri – Ahvaana, pakshi, yushmat,
mama, panchama, Indra, kumuda, Viswaksena and maatraadeena.
During dwajarohana, khaga taala should be played on beri for Garuda,

bali tala for Viswaksena, sama tala for Kumudan, malla tala for the 

five weapons of Vishnu, paddhava for Kumudakshan, malla tala for

Vamana, mangala for Sankhukarna,
jaya tala for Sarvanetra, Bhadra for Sumukha, and Adi for Agni.
All devatas come to witness the Brahmotsavam. Paadma Samhita
says sama tala is played in the East, paddhava in the South, malla
in the South West etc. Manavala Mamunigal says that talas
gajagarna, choragathi, Lakshmikirti , makharadwaja must be
used for Thiruvaimozhi pasurams. Beri and dundubhi are mentioned
in Vedanta Desika's Yadavabhyudaya.

(Curtesy: Sri P.T. Seshadri in a discourse.)