I encourage artists, designers and curators to use brief audio recordings - linked to QR codes - to give audiences an insight into the artwork they are viewing. This strategy can be used for wall texts (think museum audio guide), postcard invitations, outdoor plaques, etc.. The "5 minute takeouts" on this site are examples of brief audio statements that could be linked to QR codes.
A QR code is a special type of bar code that links the "real" or analog world of print (wall labels, magazine ads, signage, etc.) to the digital world of web-based information. A QR code is encoded with a URL - any URL - and then uses a scanner/reader on a smart phone to make the connection to that online address. Whatever is located at that address (a google map, Youtube video, audio file, image, pdf, etc.) gets delivered to the smart phone user.
Here's a brief "tutorial" on recording audio and linking the file to a QR code.
One simple way is to download the Soundcloud app to your smart phone.
http://soundcloud.com/mobile?ref=ipad (Cinch.fm and AudioBoo.fm are alternatives). This method allows you to record audio statements (best to keep them brief) on your phone and store those audio files on your own Soundcloud account - "in the cloud."
To link the files to QR codes is pretty simple. There are smartphone apps that can do that, but they usually require a lot of typing on the phone. I prefer to do it on my lap or desktop computer.
So, once you have your audio recorded and hosted:
2. Go to www.bitly.com (Google has a similar service) and paste the URL into the big window. If you create an account, you can customize the URL to something like "bitly.com/SantaCruzHarborAudio."
3. Click shorten/customize.
4. Copy the new URL and paste it into the navigation window (where you typed bitly.com previously)
5. Type ".qr" after the new URL and hit return.
6. Bitly will automatically create a QR code and open a new page displaying it. TEST THE CODE with whatever QR scanning app* you have on your phone, then download the graphic into a folder on your desktop - or somewhere handy.
7. Name the QR code file appropriately. (I generally save it as a gif file, since it's a hard-edge graphic) On a Mac, you can use the "annotations" tool in the "Preview" app to put the name right on the QR code. Resize, according to how you're going to use it. Generally it's best to print no smaller than 1-1/2 inches square. MANY QR codes are printed too small and don't work!
8. If you drag and drop the labelled code into a Word document, you can resize the first one to about 1.8" then copy and paste to get 9 on a sheet of paper (depending on how you set your margins). Then, you can print and slice them apart with a paper cutter.
Below is an example that points to an audio promotion for a web site.
This next one isn't linked to audio, but to the QRartguide.com site, optimized for mobile devices. If you're sending someone to a web site (rather than a simple audio file) with a QR code, make sure it's mobile optimized, not a big, complicated slow-loading flash site that's hard to navigate on a small screen.
*If you don't have a QR scanning app in your phone, I-Nigma works on Mac, Blackberry, Android, and Windows phones. Download info is here, but check compatibility before you download for your device.