I see in the K3 manual that the mic connector has one pin for PTT and
two grounds. My mic, a Shure 450
(http://www.shure.com/stellent/groups/public/@gms_gmi_web_ug/documents/web_resource/us_pro_450_series_2_ug.pdf)
has a red and black wire for PTT. They are not part of the audio circuit
but are just shorted by the PTT in the mic. Can anyone offer any
guidance in wiring this mic?
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