There is more than one band called Betamaxx. Betamaxx were a chillwave/lo-fi band from Newcastle, UK. They now trade under the name Topaz Gang. Taking props from music of the 70s and 80s, as well as videogames and booze, they create fuzzy bedroom jams nostalgic of summers past. Line-up:
Tom Reah - vocals, sampler, keys
Euan Lynn - bass, synths facebook
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soundcloud

Read more about Betamaxx on Last.fm.