'Problem Solving' Beta Binaural Beat - 30Hz (1h Pure)

Binaural Beats for Focus - Efficiency - Ideas - coding at 14-30hz Beta Music!

25 - 150 Hz Audio Sweep

One Hour Solfeggio Frequencies For Vagal Nerve Stimulation | 30Hz, 160Hz, and 120Hz

(27-30Hz) $uicideboy$ - Champion of Death (Rebassed by Erkzyzz)

E - 40 Bamboo【Rebassed 30Hz & BassBoosted】[LOW BASS]

Fellsius - 30hz