Example 1
	 
	 
tuner 	----->    mixer    ------>      connector
   | 	    	    |        			 
   | 	    	    |	     	        	 
  /dev/radio	   /dev/snd/control      	 
	        		        	 
	        		        	 
	        		        	 
Example 2       		        	 
	        		        	 
tuner 	----->    mixer    ------>      DMA    	 
   | 	    	    |        	          |      
   | 	    	    |	     	          |      
  /dev/radio	   /dev/snd/control      /dev/snd/pcm
	        	                	 
			                	 
			                	 
Example 3       	                	 
	        	                	 
tuner 	----->	  mixer    ------>      DMA    	 
   |	            |        	          |      
   | 	            |	     		  |      
  /dev/radio       /dev/radio   	 /dev/snd/pcm
	        				 
	        				 
			                	 
Example 4       	                	 
	        	                	 
tuner/mixer    ------>      DMA    	 
   |         	             |   
   |  	     		     |   
  /dev/radio	       	 /dev/snd/pcm
	        	        	         
	        	        		 
	        	        		 
Example 5       	        		 
	        	        		 
tuner  ----->   FM/AM demod  ----->  A/D conv.  ------>  mixer  ----->   DMA
  |     					 
  |
  /dev/v4l-subdev
		 
		 
Example 6       	        		 
	        	        		 
	        	        		 
	        	        		 
	        	        		 
tuner B   --      	        		 
|           -->   	        		 
| tuner A ---->   FM/AM demod  ----->  A/D conv.  ------>  mixer  ----->   DMA
| |             				 			      
| |	
| /dev/v4l-subdevA
|       	 
/dev/v4l-subdevB