Round these parts (Ceredigion and Carmarthenshire and further South) the "ae" is sounded as the long a in park. So Cymraeg is usually pronounced as Cumraag, traed is pronounced as traad. I've noticed, however, that where the "ae" appears in the first syllable, (eg Aeron, aelod) the diphthong is pronounced as "eye". Aberaeron, being the mouth of the river Aeron, is invariably pronounced as Aber-eye-ron.
Remember that Welsh is no more subject to regional variations in pronunciation than any other language and any attempt to find a "correct" pronunciation is likely to be frustrated/ing.
I still haven't been able to persuade my Derby wife (after 36 years) that my pronunciation of "bus" and "bath" is "correct". I shall probably give up soon.
