Fixed typos in cli output and source code comments

docs/sdr.html

@@ -223,7 +223,7 @@ I suggest to stay below 60% for each threads.
 
 <p>
 <b>Example: C-Netz</b><br>
-Two channes are created, one the OgK (control channel) and one SpK (speech channel).
+Two channels are created, one the OgK (control channel) and one SpK (speech channel).
 The distance between channels is 20 KHz (two channels).
 Because C-Netz uses only odd channel numbers for 10 KHz spacing, we use channel 131 (OgK) and 135 (SpK).
 </p>