I've been playing around with creating isochronic tones for myself, and decided to share some. They should be playable in the playlist player, and you should also be able to do the "save link as" thingy to save the .ogg files on your computer/device so you can play them in whatever player you prefer. They are each 10 minutes long. I personally find that's more than long enough because my ears tend to get tired of them after a while. A decent audio player should be able to loop each individual file infinitely if you tell it to. On linux, Qmmp and ...