Finally! I found oscilloscope software!

[ExpAnonColin]

I kept meaning to look for it, but I found the perfect fit... MacCRO for Mac OS X.  It uses your sound input as the input device, and gives you a nice reading of what you're putting into your computer.  You can't do things like troubleshoot TVs or anything with it, but it works fine for basic puropses.  It's easy to just bring up and it's free.

I can only hope there's something like this for you PC users

-Colin

[mike darling]

I like SignalScope, but it's not free. There is a 30 day trial though.

http://www.versiontracker.com/dyn/moreinfo/macosx/18581

Lately I've been just using a recording program (Peak) to capture from the audio in (a crappy imic - no audio in on my ibook).  From there i can go into Matlab and massage the waveform, even mess around with some DSP algorithms i've been working on

[Arno van der Heijden]

From there i can go into Matlab and massage the waveform, even mess around with some DSP algorithms i've been working on

I love Matlab!!  
These DSP algorithms, did you make them in Matlab? Do you know some helpful internet sites that might help me getting started with such algorithms?  

[mike darling]

The reason i brought up the matlab stuff is because i've found the oscilloscope programs pretty limited as far as capturing waveforms go. They're good for sinusoids and repetitive stuff like oscillators or signal tracing - but i've found that using matlab to do fft or other analysis is the way to go. It's especially useful if you're plotting waveforms for inclusion in a report or print.

I started using matlab when i took an introductory DSP course which didn't really go too far into using matlab as a tool. It was used as more of a way to explain concepts within the course. I played around with a clipping algorithm as a final project for the class. It was kind of cool, but nothing really useful.

I don't know how applicable this kind of stuff is to a realtime DSP algorithm since i've been working with existing files and post processing them. Right now I just use it to keep myself busy on the train.