I'm something of an amateur linguist myself,and I frequent linguistics websites and forums.
Here are some pointers: Mussorgsky is accented on the FIRST syllable,not the second.
Many mistakes in pronouncing composer's names are the result of putting the emPHA-sis on the wrong Syl-LA-Ble.
Bartok is pronounded Bar-toke,rhyming with spoke,not talk. Hungarian words are always accented on the first syllable. It's not Zsa Zsa Ga -BOR, but GA-bor.
Kodaly is not Ko-DIE-ee but Ko-die.
In the Armenian name Khatchaturian, the KH is prounounced gutturally as in Chutzpah.
The Russian first names Sergei,Andrei, Kiril, and Boris are accented on the second syllable, but Igor is pronounced as the English word "Eager",as in eager beaver. Mikhail is pronounced Mi-Kha-EEL, the KH as in chutpah. Vladimir is pronounced vla-DEE-mir,not VLA-di-mir.
Einojuhani Rautavaara is pronounced AY-no,not eye-no yu-ha-ni. Rau as in Bow-wow ta vaara.
Ligeti is LI-geh-ti. Gyorgy is pronounced D'yord'y. With the o like the German O with umlaut.
It's one syllabel,not two.
Alberto Ginastera is not pronounced Hee-na-stera but Jee-nastera as in blue jeans. The name is Italian, not Spanish.