Originally Posted by greggorypeccary
I always found that strange. Playing a 7th on the one & four sounds funny and I rarely hear that in actual songs.
But if you look at most of your basic piano/guitar/vocal song books, they seem to make most of the guitar chords 7th's for some reason.
Because it's so common to have the 7th somewhere in the band, even if the guitar isn't necessarily playing it. The overall tonality is dominant.
Here's a good example: Freddie may
not ever play an actual '7th' chord voicing but he certainly implies dom7 with the licks behind/between the vox as well as his vocal melody and the keys players are constantly hitting and emphasizing the '7th'.
*I rarely hear (dominant) Blues as being only triads on the I and IV.