I am quite sure that PureData is the tool you are looking for! Getting the amplitude value at certain moments and storing them to a table (storage in pd-speak) is a very easy thing. Recording could also been done within Pd, in .wav format and then be encoded by a shell command such as oggenc. I am not sure howto implement the image (.jpg) display right now, but it can't be too hard and is possible for sure (using the Pd-addon library Gem) good luck, post again for more questions if you like! lg,Peter