I received a request for help this afternoon and it's already Shabbat in the requester's time zone, so I'm asking on her behalf.
A small community has just lost their Rosh Hashana sh'liach tzibbur and they don't have anybody who both knows the traditional melodies and has enough musical skill to produce them. Where online can they find recordings of "base" melodies, not ornamented like chazzanut often is and not done as complex multi-voice arrangements?
They would like something with a single, clear melodic line, preferably something that will not sound too weird to a European, Orthodox, Ashkenazi community (rather than Israeli music or American Reform stuff or Chassidic style). Particular wish list:
יגדל (the festival tune)
The piyyut כי הנה כחמר (text has local significance)
This page from the Reconstructionist Rabbinical College has settings of some of these; whether they are the settings that would be usual in an Orthodox Ashkenazi congregation I do not know.