I do know that in some regions of Spain like Andalusia they speak Spanish with more than 5 vowels. Do they use these extra vowels sistematically? Are these vowels closed e and o ? What about schwa? Where I can get more information? I think that this is very interesting because everybody assume that all the people speak Spanish with just 5 vowles but there are some native speakers in certain Spanish regions who use more than 5 vowels.
About Spanish dialects with more than 5 vowels.
He is referring to those vocalic sounds which do not correspond with the five well known Spanish vowels. I've also heard people in certain zones of Spain like Cordoba and Murcia pronouncing strange vowels.
Thank you but that link hasn't the information I'm looking for. I feel a bit frustrated because it seems that there is nothing in the whole Internet about this, but I heard these vowels to Spanish speakers in the city of Cordoba.
This is what I've found about Cordoban Spanish:
Vocales abiertas: muchas de las vocales se abren, especialmente si indican plural, de forma que la oposición singular/plural se marca con la oposición fonológica cerrada/abierta respectivamente. Si las vocales se abren excesivamente, aumentan un grado conviertiéndose en la vocal siguiente en abertura, por esa razón "seis" puede sonar "sae" en Córdoba (con la pérdida de la -s añadida).
http://wikanda.cordobapedia.es/wiki/El_habla_en_la_capital
Vocales abiertas: muchas de las vocales se abren, especialmente si indican plural, de forma que la oposición singular/plural se marca con la oposición fonológica cerrada/abierta respectivamente. Si las vocales se abren excesivamente, aumentan un grado conviertiéndose en la vocal siguiente en abertura, por esa razón "seis" puede sonar "sae" en Córdoba (con la pérdida de la -s añadida).
http://wikanda.cordobapedia.es/wiki/El_habla_en_la_capital