Commands:
  wc -c fixtures/wire/frame-v1-valid.bin fixtures/wire/frame-v1-invalid-reserved.bin
  od -An -tx1 -N56 fixtures/wire/frame-v1-valid.bin
  od -An -tx1 -N16 fixtures/wire/frame-v1-invalid-reserved.bin
  cmp -l fixtures/wire/frame-v1-valid.bin fixtures/wire/frame-v1-invalid-reserved.bin

Observed sizes:
1960 fixtures/wire/frame-v1-valid.bin
1960 fixtures/wire/frame-v1-invalid-reserved.bin
3920 total

Valid header and first four samples:
 01 00 00 00 80 07 00 00 05 00 00 00 00 00 00 00
 2a 00 00 00 00 00 00 00 00 ca 9a 3b 00 00 00 00
 07 00 00 00 00 00 00 00 00 00 00 00 00 00 80
 00 00 80 3f 00 00 80 bf

Invalid header:
 01 00 00 00 80 07 00 00 05 00 00 00 01 00 00 00

cmp -l output (one-based byte position, octal values):
  13   0   1
