displaying a recorded signal as a graph

[Aiswarya]

my task is to develop an application which displays a signal(for example an audio signal) as a graph.along with that i should store all those signals in my database.can anyone tell me a way to take the samples from the signal so that i can display it and store it in the database

[corrado1972]

you can take a look to examples, in particular to oscilloscope.