 Concealed Sounds released O Pen on Wed May 20 2015. The 10 track House release features Martinez.<br /><br />**Concealed Sounds** has also released vinyl by [Barbir](/artist/barbir), [Alex Celler](/artist/alex-celler), [Melchior Productions Ltd](/artist/melchior-productions-ltd), [Kreon](/artist/kreon), and [Lowris](/artist/lowris). Browse the [Concealed Sounds catalogue](/label/concealed-sounds).

Martin Swanstein, better known as Martinez, is a Swedish/Danish House Music & Techno DJ/Producer currently based in Copenhagen, Denmark. Nowadays, he is well known for his releases and remixes on his own label: Concealed Sounds, as well as Minibar, Lomidhigh, Aeternum, NervMusic, Cadenza, Oslo, Tied, Memoria and many more. Martinez first release, that kick started his carrier in 2000, was his 'Laidback Grooves EP' on the notorious chicago based Deep-House label Guidance Recordings.

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