Wav File Sink: Difference between revisions
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(Updated parameter description for >= 3.9) |
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[[Category:Block Docs]] | [[Category:Block Docs]] | ||
Write stream to a Microsoft PCM (.wav) file. | Write stream to a Microsoft PCM (pulse code modulated) (.wav) file (all versions of GNU Radio) and some other file formats that [http://libsndfile.github.io/libsndfile/formats.html ''libsndfile''] supports (GNU Radio 3.9.0.0 and later): | ||
Values must be floats within [-1;1] | Values must be floats within [-1;1]. | ||
== Parameters == | == Parameters == | ||
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: Sample rate of the recording | : Sample rate of the recording | ||
; Bits per Samples | ; 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 ([https://en.wikipedia.org/wiki/RF64 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 == | == Example Flowgraph == |
Revision as of 10:45, 26 June 2022
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