listreader wrote:
[..]
Whats good software in linux to generate certain frequencies?
judging from your motivation I can't say if it's /good software/, but
"xmms" is avail. for many linux-distros:
xmms tone://1000 # is pretty annoying
xmms tone://15000 # even more so
xmms tone://18000 # is beyond my laptop's speaker capabilities