File Extension: `.frad`

Fixed Header

Fixed Header Table

	0x0	0x1	0x2	0x3	0x4	0x5	0x6	0x7
0x00	0x66	0x52	0x61	0x64
0x08	Header length	———	———	———	———	———	———	———
0x10
…
0x30
0x38

`0x00`~`0x03`: File Signature, fRad

representing Fourier Analogue-in-Digital

`0x04`~`0x07`: Reserved

`0x08`~`0x0f`: Total header length(uint64 BE)

Up to 16 Exbibytes including Fixed header space

`0x10`~`0x3f`: Reserved

Metadata blocks

Metadata block	0x0	0x1	0x2	0x3	0x4	0x5	0x6	0x7
0x00	Block Type	———	Block data	…

`0x00`~`0x01`: Metadata block type

`0x02`~: Metadata block data

Metadata

Audio Stream Frame (9 Bytes)