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@@ -145,6 +145,14 @@ Testing
 
 
 
+Note
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+For this project, it was necessary to rapidly switch the modes of the GPIO pins.  (This allows a matrix of 16 buttons to be sensed using far fewer GPIO pins.)  It turned out this was only possible if **pd** was started using the root account.  Therefore, in contrast with other Satellite CCRMA projects, this project is started directly from */etc/rc.local*
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 Troubleshooting
 ---------------
 * If it doesn't seem to be working, you will want to try to localize the problem.  First, power you project back down again.