{
                                        .Header              = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Std_t), .Type = DTYPE_Endpoint},
 
-                                       .EndpointAddress     = (ENDPOINT_DIR_OUT | MIDI_STREAM_OUT_EPNUM),
+                                       .EndpointAddress     = MIDI_STREAM_OUT_EPADDR,
                                        .Attributes          = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
                                        .EndpointSize        = MIDI_STREAM_EPSIZE,
-                                       .PollingIntervalMS   = 0x01
+                                       .PollingIntervalMS   = 0x05
                                },
 
                        .Refresh                  = 0,
                                {
                                        .Header              = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Std_t), .Type = DTYPE_Endpoint},
 
-                                       .EndpointAddress     = (ENDPOINT_DIR_IN | MIDI_STREAM_IN_EPNUM),
+                                       .EndpointAddress     = MIDI_STREAM_IN_EPADDR,
                                        .Attributes          = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
                                        .EndpointSize        = MIDI_STREAM_EPSIZE,
-                                       .PollingIntervalMS   = 0x01
+                                       .PollingIntervalMS   = 0x05
                                },
 
                        .Refresh                  = 0,