To record using the PC's in Room 309 CoC:

• Plug in the microphone.
• Make sure your recording and playback volumes are properly set. To do this, click on start, settings, control panel, multimedia.
• Click on start, accessories, multimedia, sound recording.
• Go to file, properties, click on convert now. Then choose 8.000 kHz, 16 bit, mono. This is important, since you want both received and transmitted waveforms to be sampled at the same rate.
• Click on the record button to start recording, on stop button to stop it.
• After you are done, save your file as .wav (the default extension).
• In MATLAB, use "wavread" to read the file.

Some advice from a fellow student.

I just wanted to pass on some information that could be beneficial to the class for the project. When I attempted to do problem 3 on the homework, I initially tried to pipe everything through my sound card. Since my internal speaker is disabled with my sound card, I was using a microphone through the sound card, in addition to my speakers. However, I discovered that my sound card is only half duplex, preventing me from simultaneously recording and playing. Instead of using two computers to work on the assignment, I found a speaker driver which will play the output of Matlab on the internal speaker, while I use my sound card for the microphone input. The following link is to a website that has a link to download the speaker driver, in addition to the installation instructions:

http://support.microsoft.com/support/kb/articles/Q138/8/57.asp

I talked to a few people after class and they were having the same problem. Please provide this on your website so others will know that it is possible to record and play on a single computer without a full-duplex sound card.