Vowel qualities and consonants

Hey!

Remembering Henrik's question for which vowels and
consonants are related, my question is in how far vowel
qualities, i.e. front, back, open, closed, high, low, can
affect consonants? Maybe this is why I don't arrive at any
sound changes, because I don't get how consonants and
vowels are related?

Thanks,
Carsten

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