最終更新:2022-06-03 (金) 15:31:41 (694d)
タイプIフォーマットタイプディスクリプタ
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| Offset | Field | Size | Value | Description |
| 0 | bLength? | 1 | Number | Size of this descriptor, in bytes: 8+(ns*3) |
| 1 | bDescriptorType | 1 | Constant | CS_INTERFACE descriptor type. |
| 2 | bDescriptorSubtype | 1 | Constant | FORMAT_TYPE descriptor subtype. |
| 3 | bFormatType? | 1 | Constant | FORMAT_TYPE_I. Constant identifying the Format Type the AudioStreaming? interface is using. |
| 4 | bNrChannels? | 1 | Number | Indicates the number of physical channels in the audio data stream. |
| 5 | bSubframeSize? | 1 | Number | The number of bytes occupied by one audio subframe. Can be 1, 2, 3 or 4. |
| 6 | bBitResolution? | 1 | Number | The number of effectively used bits from the available bits in an audio subframe. |
| 7 | bSamFreqType? | 1 | Number | Indicates how the sampling frequency can be programmed: 0: Continuous sampling frequency 1..255: The number of discrete sampling frequencies supported by the isochronous data endpoint of the AudioStreaming? interface (ns) |
| 8... | See sampling frequency tables, below. |
