TheArchive/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2024-11-27 12:05:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

Took out audio while describing the C16 capture

NotPike 2023-07-08 10:09:16 -07:00
parent 18e52b3635
commit 8f94366870
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
C16-format.md

@ -34,7 +34,7 @@ You can use GNU Radio Companion (GRC) to convert the C16 short into a complex IQ
As seen in the image above you'll need to bring in the original C16 file using the GRC block `File Source` setting the output type to short, pipe it to `IShort To Complex`, then `Multiply Consent` using the magic number 1.0 / 32768.0 for the constant, and finally export it with `File Sink`.
The reason that the value 32768.0 is used to normalize the C16 audio capture is because int16 has a range of -32768 to +32767. 2^15 is 32768.0, so dividing int16 value by 2^15 gives a number that is normalized between -1 and +1.
The reason that the value 32768.0 is used to normalize the C16 capture is because int16 has a range of -32768 to +32767. 2^15 is 32768.0, so dividing int16 value by 2^15 gives a number that is normalized between -1 and +1.
This GRC script can be found at [`firmware/tools/convert_C16_to_complex.grc`](https://github.com/eried/portapack-mayhem/blob/next/firmware/tools/convert_C16_to_complex.grc)