Synth music with a 4x4 beat, period. One of the first forms of synthwave 4x4 recorded is Synthwaves by synth pioneer Robert Schroeder.
This station has raw grittiness processed into that tight sound that electro and industrial danceheads love to sip up, yet not neglecting the various colours found in dance synthpop, some hand picked disco, Space Disco, and general uncategorizeable 4x4 dancesynthpop. Includes nu elektro and cytrance.

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Synthwave 4x4 also helped spawn Factory Made Trance…………………….Thanks 4 image……………..http://www.musicfromouterspace.com/analogsynth_new/SOUNDLABMINISYNTH/images/mediumsoundlab_photo_cropped.jpg