Index: src/apps/plugins/pictureflow/pictureflow.c
===================================================================
--- src/apps/plugins/pictureflow/pictureflow.c	(old version)
+++ src/apps/plugins/pictureflow/pictureflow.c	(new version)
@@ -1404,6 +1404,7 @@
         return 0;
     }
 
+    rb->yield(); // allow audio to play when fast scrolling
     struct dim *bm = buflib_get_data(&buf_ctx, hid);
 
     bm->width = bmph.width;
@@ -1802,6 +1803,9 @@
                 pixel -= PIXELSTEP_Y;
             }
         }
+        rb->yield(); // allow audio to play when fast scrolling
+        bmp = surface(slide->slide_index); // resync surface due to yield
+        ptr = &src[column * bmp->height];         
         p = (bmp->height-DISPLAY_OFFS) * PFREAL_ONE;
         plim = MIN(sh * PFREAL_ONE, p + (LCD_HEIGHT/2) * dy);
         int plim2 = MIN(MIN(sh + REFLECT_HEIGHT, sh * 2) * PFREAL_ONE,