ArtistInfo
Groan-er
PO
Producer of Dance
A.k.a. Marcin Sumka
Polish speedcore producer.
Popular Tracks 
Ground & Pound on Terrordrang Records 007 by Various Artists Terror Domination on Terror Domination by Groan-er Depressive on Depressive by Groan-er Wyszło Szydło Z Worka on Wyszło Szydło Z Worka by Groan-erTrack list and 30sec audio provided by 
Discography
| Title | Artist | Year | Type |
|---|---|---|---|
| The Maskhead | Groan-er | 2017 | Album |
| Ziemia Złem Wykuta | Groan-er | 2016 | Album |
| Anti Human EP | Groan-er | 2015 | Album |
| Aniołowie Gryzą Piach | Groan-er | 2015 | Album |
| Something Wrong EP | Groan-er | 2014 | Album |
| Witness Hell EP | Groan-er / Bula | 2012 | Album |
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Acknowledgements
To all the music fans that are contributing on Discogs, MusicBrainz and Wikipedia. Thanks to Franz Flückiger for providing Storygram used to visualize band membership.ArtistInfo for Mac, iPad, and iPhone
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