[Ham-Mac] USB Sound interface with macbook and 10.5?

[Ross Primrose]

Just curious which USB sound interfaces people have had luck with under 
OSX? I want to use something other than the built-in sound on my macbook 
for running digital modes with my K2...

73, Ross N4RP

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FCC Section 97.313(a) “At all times, an amateur station must use the minimum transmitter power necessary to carry out the desired communications.”