“Baudline is a time-frequency browser designed for scientific visualization of the spectral domain. Signal analysis is performed by Fourier, correlation, and raster transforms that create colorful spectrograms with vibrant detail. Conduct test and measurement experiments with the built in function generator, or play back audio files with a multitude of effects and filters. The baudline signal analyzer combines fast digital signal processing, versatile high speed displays, and continuous capture tools for hunting down and studying elusive signal characteristics.”
Baudline
Unfortunately when I tried to run this interesting signal analysis program on my ThinkPad running Ubuntu GNU/Linux (11.04), it gave the famous “all input devices disabled” error on its main screen. The FAQ on its website did not help, so after a bit of tinkering I found a solution:
aptitude install alsa-oss
Installing ALSA wrapper for OSS applications seems to solve the problem by letting you run program as:
aoss ./baudline
Thanks to this tiny utility I can continue exploring baudline and analysing mystery signals. 😉
FZ Blogs 
Ronald
July 19, 2012 at 00:09
Thanks for your baudlne tip !
Thio
August 22, 2012 at 00:37
THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU ! you saved me. i was looking for hours for that solution for aoss answer. You are the correct faq that i found. Thank you my friend.
robert
June 2, 2013 at 14:52
thank you!
ockert8080
August 8, 2013 at 20:45
dankie man!
zibri
September 17, 2019 at 14:00
I see /dev/audio but it’s silent… doesn’t get input from microphone?