isochronic tones for studying

30:01

3:18

15:00

3:48

10:22

9:51

13:17

29:48

1:00:02

1:00:04

58:40

2:44:08

58:40

3:02:52

58:40

1:02:46

2:00:25

2:12:25

1:01:01

58:40

58:40

12:29

1:02:46

12:29

57:32

5:39

9:44

5:24

2:55

6:12

29:46

5:54

5:02

5:39

10:26

4:16

3:00:13

5:16

54:16

11:36