Wav File Sink

Write stream to a Microsoft PCM (pulse code modulated) (.wav) file (all versions of GNU Radio) and some other file formats that libsndfile supports (GNU Radio 3.9.0.0 and later):

Values must be floats within [-1;1].

Parameters

(R): Run-time adjustable

File (R)

Path to the file to write to

N Channels

Number of audio channels

Sample Rate

Sample rate of the recording

Output Format (GNU Radio 3.9 and later)

choice of possible container/audio formats:

• WAV (old-school windows RIFF sound files)
• FLAC (lossless audio codec – probably a good choice for storage of actual audio data)
• Ogg file (Container for lossy compression – allows for choice of vorbis, or OPUS, as audio codec. Prefer OPUS. Very good quality.)
• 64-bit WAV (RF64, used in broadcasting standards, to support massive multichannel files, and files > 4 GB)

Bits per Samples (only WAV, FLAC, 64-bit WAV)

Bit-depth of the recording.

Rule of thumb: you don't need more than 2 + (audio SNR)·2 bits of integer bitdepth to keep quantization noise below signal noise.

"Float" always suffices, but is wasteful on size, if you're using "Double" without having written down a calculation why, you're doing it wrong

Example Flowgraph

Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI. Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.

Source Files

C++ files

TODO

Header files

TODO

Public header files

TODO

Block definition

TODO