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Extracting sensitivity and gain for SM4 #331

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elisagirola opened this issue Feb 28, 2023 · 2 comments · Fixed by #357
Closed

Extracting sensitivity and gain for SM4 #331

elisagirola opened this issue Feb 28, 2023 · 2 comments · Fixed by #357
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@atruskie
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area: metadata enhancement New feature or request

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@elisagirola
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SM4 recorders save information about the gain
image
it would be good to extract this information.

Pelase note that:

  1. the value 42.2 is similar to the sum of the Gain (16) and Preamp (26) values that can be seen when opening the file with Kaleidoscope. But I cannot tell whether that's just a coincidence or what the 0.2 difference mean
    image

  2. In the first part of the wamd chunk there is a value of 45.2 that could also refer to a gain
    image

  3. According to the manufacturer, the sensitivity for the SM4 is -35±4dB (0dB=1V/Pa at 1kHz). I cannot see it in the wamd chunk.

  4. As far as I know the Song Meters have both a manual and a digital gain. But I don't know what the values in the wamd chunk refer to.

Thanks
@atruskie atruskie self-assigned this Mar 9, 2023
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atruskie commented Mar 9, 2023

Yeah so, I looked at this, I'm part way through extracting the values, but there are still some questions.

There are also different values in the guano block. WA publishes the meaning of these fields here: https://www.wildlifeacoustics.com/SCHEMA/GUANO.html

so from what I can see there is:

  • microphone sensitivity in the wamd block: 45.2 dBFS
  • there is a gain value in the guano block: 42.2 dB
    • I believe this is the total gain of 16 dB software gain and 26 dB of preamp gain

@atruskie atruskie added the enhancement New feature or request label Mar 9, 2023
atruskie added a commit that referenced this issue Mar 9, 2023
@atruskie
Improves support for SM4s
e8dad41 
- Adds high precision timer support for SM4s. Fixes #330
- Adds support for microphone sensitivity reporting for Sm4s partially addressed #331
- Adds make, model, and sensor name for SM4. Partially addresses #296

- BREAKING change: resets channel identifier to match industry standard. i.e. the first channel is 0 (left). We were counting from 1 which is not the most popular format: https://en.wikipedia.org/wiki/Surround_sound#Channel_notation
- BREAKING: Fixed a bug with the Location parsing code! Coordinates from WA sensors will now report the correct hemisphere
@atruskie atruskie mentioned this issue Mar 9, 2023
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atruskie added a commit that referenced this issue Apr 19, 2023
@atruskie
Adds WA schedule decoding, metadata dump, and better formatting
93ad061 
This is a huge change set - everything got mixed together.

We now decode the schedule that's embedded in WA files
and we've added a `metadata dump` command to show the
huge amount of information that's been added.

Fixes #331 - now reports gain and sensitivity in metadata command
Fixes #350 - now has a metadata dump command

Other noteworthy changes:

- Added `metadata show` as an alias for `metadata` since `metadata` grew from a command itself into a parent of commands. `show` as a subcommand is more consistent.
- Added a new text-base generic object formatter for the default and compact formats
  - both metadata show and dump commands have been updated to use this format
  - the default is now prettier and formats subobjects recursively in the same format
  - the compact format is now genericly implemented and consistent in it's implementation
- Reverse engineered the WA schedule file formats, documented the format, and wrote parsers for those files!!
  - There are few fields for which their purpose could not be guessed at
- Added a source generator that reads out fixture data file and generates named constants to use in tests
- The WAMD metadata extractor now decodes the DevParams field (the schedule)
- Removed the --no-checksum option from global CLI options and instead placed it only on metadata/metadata show commands
- Made printing file paths more consistent in all metadata and fix commands
- BREAKING: changed `SourcePath` to just `Path` in metadata commands (the shorter name is simpler and more consistent with other terminology used in EMU)
- Added a new metadata extractor interface `IRawMetadataOperation` that support the dump command by reading primitive metadata values and does not attempt to merge them into a consistent `Recording` structure
- change the ansi output renderer to by default render to a test "console" that has infinite width
@atruskie atruskie mentioned this issue Apr 19, 2023
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Available in the 7.0.0 release.

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Adds WA schedule decoding, metadata dump, and better formatting QutEcoacoustics/emu
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