diff --git a/audio.h b/audio.h
index 674c27e..907519b 100644
--- a/audio.h
+++ b/audio.h
@@ -30,7 +30,8 @@ enum ptt_method_e {
 	PTT_METHOD_SERIAL,	/* Serial port RTS or DTR. */
 	PTT_METHOD_GPIO,	/* General purpose I/O, Linux only. */
 	PTT_METHOD_LPT,	    /* Parallel printer port, Linux only. */
-    PTT_METHOD_HAMLIB }; /* HAMLib, Linux only. */
+    PTT_METHOD_HAMLIB,  /* HAMLib, Linux only. */
+    PTT_METHOD_AUDIO }; /* Audio channel. */
 
 typedef enum ptt_method_e ptt_method_t;
 
diff --git a/config.c b/config.c
index 8090c85..8dee3e8 100644
--- a/config.c
+++ b/config.c
@@ -1582,7 +1582,10 @@ void config_init (char *fname, struct audio_s *p_audio_config,
 	      dw_printf ("Config file line %d: %s with RIG is only available when hamlib support is enabled.\n", line, otname);
 #endif
 	    }
-	    else  {
+        else if (strcasecmp( t, "CHN") == 0) {
+          p_audio_config->achan[channel].octrl[ot].ptt_method = PTT_METHOD_AUDIO;
+        }
+        else  {
 
 /* serial port case. */