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This is a demo video for the iRig Mic Cast, whic is a $40 portable micrphone for the iPhone, iPod touch and iPad.

The iRig Mic Cast is designed for recording podcasts, interviews, lectures, voice memos and speeches. It features a unidirectional pickup pattern that minimizes background noise, making it ideal for single-source audio recording.

The video demonstrates the difference between using the iPhone’s built-in microphone and the iRig Mic Cast, in a couple of noisy locations.

Click here to view the embedded video.

Luis Alamilla offers his take on the $60 iRig microphone, a handheld condenser unidirectional microphone designed to be used with the iPhone, iPod touch, and iPad.

The iRig isn’t designed to give you the same quality as a mic + audio adapter combo, but is a simple solution that should meet the needs of a lot of podcasters for an inexpensive basic microphone.

If you’ve used the iRig, leave a comment and share your thoughts on it!