Augmented 5th and minor sixth (8 semitone interval)

Abhijitnath, could not understand the sharpened logic. A sharpened 5th = Aug 5th or minor 6th. Why is this not correct? In the end we are talking of a 8 semitone interval.

 

The interval is the same, the way it is used and the chords that can be constructed thereof are completely different. E.g. if there is a minor 6th, the chord using that note would be a minor or maj/min 6th, ie 1, b3, 5, b6 or 1, 3, 5, b6. If the same 8 semitone interval were used as an augmented 5th, the chord using that interval would be an augmented 5th and would sound completely different and used in a different context in the scale. ie 1,3,#5.

 

Thanks Abhijitnath for the explanation. Is it to say that 1 3 #5 and 1 3 b6 would sound different? or there is more to this?

 

In isolation, of course they would sound the same. As in if you strum those three notes together on your guitar with no backing, there is obviously no difference between the two.
However, lets take two scales:
Root 2 3 4 #5 6 7 Root
and
Root 2 3 4 5 b6 7 Root
and play some licks using this scale, and in the middle of this, play that chord, ie 1 3 #5.
You would immediately hear that the two sound different contextually, since the purpose of that interval is different, and is either softly consonant or softly dissonant depending on the context of the scale.
I hope that makes it clearer.

 

Got it dude. Many thanks for explaining it at length.