"Summer Night City" (1978) is a very special song, criminally underrated.
It is categorized as a pop/europop/disco song, but if you listen closely, ABBA is not just doing disco in this song; they are (maybe subconsciously at that time) pointing to the future of music.
Listen e.g. to
the bridge at 1:01; there is suddenly a synth arpeggio coming in, which gives it a trancelike feel.
You could pretty easily do a modern electro/trance/EDM cover of this song today. "Summer Night City" is a very early precursor to such music.
And the other criminally underrated ABBA song "The Visitors" (1981), is actually a sort of a rewrite
of "Summer Night City"
1. The songs don't sound the same, but it's because ABBA evolved (and then dissolved).
First, listen to the instrumental intro of "Summer Night City"
at 0:17.
It is the same melody pattern as the chorus in "The Visitors" at
2:10 (it's not exactly the same, but very similar).
And in "
The Visitors" you hear the future of music more clearly:
1. ABBA has suddenly removed all guitars and piano and replaced them with synths and sound effects (at least I don't think there are any guitars or piano; if there are, they are put far into the background). Edit: there are guitars, but they are more used for effects in the background. They are distorted and with heavy reverb/delay effects on them, and some of them maybe are played backwards.
2. The standard disco beat has been replaced by a more dynamic (varying in volume) drum track (sounding more like electronic music that later came, and is also still made today):
- The intro and the first part of the verse (0:03-1:18): no drums. The underlying single note synth "arpeggio" is what keeps the beat instead.
- In the second part of the first verse (1:18-2:11), the drums suddenly come in. But it's not a "full" beat, it's a four on the floor buildup (i.e. the basic beat is four evenly placed kickhits, but they are building up in intensity over the entire second part of the first verse).
- In the chorus (2:11-3:11), the full beat comes in, but it does not quite sound like a disco beat. It is more laidback in volume and also more straight (less groove).
ABBA is in "The Visitors" leaving the 1970s and going into the 1980s and beyond, and sounding very, very different. I wonder what would have happened if they had stayed together and continued to evolve. Sadly, we will never know.
All in all, this is also a testament to their talent.
It's pretty amazing when you think of it; their breakthrough song "Waterloo" (1974) has the fundamental elements of pop and glam rock, then they did a lot of disco, ballads and art pop/rock and finally they ended up doing "The Visitors" (1981) which is a synthpop song and a precursor to later, and also, modern music.
That is versatility.
1 I have no source at the moment that confirms this, but if I remember correctly I have read somewhere that this is actually the case.