bryan wade / Mbed 2 deprecated usb_sound_effects

Streams USB audio with sound effects applied. Sound effect selected by joystick and intensity altered by tilting the mbed. Output to the mbed-application-board phono jack.

Dependencies:   C12832_lcd MMA7660 USBDevice mbed

/media/uploads/bw/img_1293.jpg 

/* Uses the mbed LPC1768 and mbed-application-board to create a USB audio device
 * that streams audio from a host computer to headphones or powered speakers. 
 * A couple different sound effects can be applied to the stream in real-time,
 * and tilting the mbed alters intensity of the effect.
 *
 *                                               ECHO
 *       The joystick selects )                   |
 *       one of three effect  )       STRAIGHT -  o  - STRAIGHT
 *       modes.               )                   |
 *                                              REVERB   
 * 
 *
 *
 *                                               \\           ||    
 *       Tilting the mbed     )      ======       \\          ||
 *       determines intensity )                    \\         ||
 *       of the effect.       )
 *                                     0%         50%         100%  
 *
 * The LCD display shows the current effect mode, intesity and buffer level.
*/

Files at this revision

API Documentation at this revision

Revision 2:9429f84ea165, committed 2014-03-27

Comitter:
bw
Date:
Thu Mar 27 21:43:41 2014 +0000
Parent:
1:d2250586c044
Commit message:
Clean up comments.

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r d2250586c044 -r 9429f84ea165 main.cpp
--- a/main.cpp	Thu Mar 27 21:30:20 2014 +0000
+++ b/main.cpp	Thu Mar 27 21:43:41 2014 +0000
@@ -69,19 +69,23 @@
 
 int main() 
 {
-    UI_Initialize();
-    Audio_Initialize(); // Start audio playback.
+    UI_Initialize();    // Init the user interface.
+    Audio_Initialize(); // Starts audio playback.
     
     while (true) 
     {   
-        //       
+        // Check the playback buffer level.      
         int32_t level = Audio_CheckPlaybackBufferLevel();
+        
+        // Update the user interface, passing in the current buffer level 
+        // for display
         UI_Update(level);          
 
-        Effects_SetGain(UI_GetEffectGain());
+        // Set the effect mode and gain according to the user input.
         Effects_SetMode(UI_GetEffectMode());
+        Effects_SetGain(UI_GetEffectGain());
 
-        // 50 milliseconds provides good UI responsivness
+        // 50 milliseconds provides good UI responsivness.
         wait(.05);
     }
 }