Downloades the zip.
Unzipped on /mnt/sdcard/su (into su i get the two folders META-INF and system).
Now I run the 1st step "adb shell /system/bin/cmdclient ec_micswitch '\`mount -o remount,rw /system\`' and I get:
* daemon not running. starting it now on port 5038 *
* daemon started successfuly *
error: device not found
It looks like adb is not setup correctly. Try this root script forum.xda-developers.com/showthread.php?t=1472521 it works right from a terminal on the tablet.