Location of Microphone input?

Question

I am trying to generate data for cryptopurposes in a similar fashion to Random.org except locally so the data isn't passed over the Internet.

I found this guide: http://openfortress.org/cryptodoc/random/

However, when I use "rec" it doesn't work because "/dev/dsp" has long been depreciated.

The command I'm running is:

rec -c 1 -d /dev/dsp -r 8000 -t wav -e signed-integer w  - | ./noise-filter >bits

Would this work as long as I change the input device to where ever the Microphone input is? If so, where is that? (I'm running 14.04)

Answer 1

There is no such device these days. I believe what you want is:

arecord -f S16_LE | ./noise-filter > bits