4 Hz | Theta Waves
4 Hz | Theta Waves a song by OPUS on BeMusic
1 Hz | Delta Waves
by
OPUS
,
4 Hz | Theta Waves
by
OPUS
,
8 Hz | Alpha Waves
by
OPUS
,
18 Hz | Beta Waves
by
OPUS
,
40 Hz | Gamma Waves
by
OPUS
,
