.ProductStrIndex        = 0x02,\r
        .SerialNumStrIndex      = NO_DESCRIPTOR,\r
 \r
-       .NumberOfConfigurations = 1\r
+       .NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS\r
 };\r
 \r
 /** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage\r
                        .SubFrameSize             = 0x02,\r
                        .BitResolution            = 16,\r
 \r
-                       .SampleFrequencyType      = (AUDIO_TOTAL_SAMPLE_RATES * sizeof(USB_Audio_SampleFreq_t)),                \r
+                       .SampleFrequencyType      = AUDIO_TOTAL_SAMPLE_RATES,           \r
                        .SampleFrequencies        = {AUDIO_SAMPLE_FREQ(AUDIO_SAMPLE_FREQUENCY)}\r
                },\r
        \r