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91 lines
2.6 KiB
Markdown
91 lines
2.6 KiB
Markdown
# CSDR-AM
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The purpose of this shell script is to record multiple AM frequencies from a single RTL-SDR and creates individual audio files per conversation.
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## Requirements
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Tested on a linux box.
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* [csdr](https://github.com/ha7ilm/csdr)
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* [sox](http://sox.sourceforge.net/)
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## Configurations
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### Within the script itself
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Change the the values to you needs. Make sure the `centered_freq` and `sampling_rate` covers the `freqs`.
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Note the syntax for `freqs` and `filenames`, they are arrays.
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Each filename template use sox multiple output mode syntax for file numbering (`%6n`). The static part is reused by `dirWatch` to distinguish which `talkgroup` to import to.
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```bash
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audio_dir=./audio_files/air
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device_id=00000001
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center_freq=119.4e6
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gain=38.6
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sampling_rate=2400000
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squelch=2e-4
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freqs=(118.9e6 119.1e6 119.9e6)
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filenames=(118900000-%6n 119100000-%6n 119900000-%6n)
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```
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## Rdio Scanner
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Whenever a new file is being created by the `CSDR-AM` script, `Rdio Scanner` will pick it up and load it.
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Since the script create a file for each frequency which will have a size of `0` until the next conversation, we have to tell the `dirWatch` entry to delay the import for `4000` milliseconds.
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The system also needs to be defined.
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> For simplicy, talkgroup ids are defined with the same value as for the frequency. It makes it easier to change things afterwards.
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```json
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"rdioScanner": {
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"dirWatch": [
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{
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"delay": 4000,
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"deleteAfter": true,
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"directory": "/home/radio/csdr/audio_files/air",
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"extension": "wav",
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"system": 61,
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"talkgroup": ".*\\/(\\d+)-.*"
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}
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],
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"systems": [
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{
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"id": 61,
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"label": "AIRCRAFT",
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"led": "cyan",
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"talkgroups": [
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{
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"id": 119100000,
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"label": "YMX TOWER",
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"name": "YMX Tower",
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"tag": "Aircraft",
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"group": "AIRCRAFT",
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"frequency": 119100000
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},
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{
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"id": 119900000,
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"label": "YUL TOWER",
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"name": "YUL Tower",
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"tag": "Aircraft",
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"group": "AIRCRAFT",
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"frequency": 119900000
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},
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{
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"id": 118900000,
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"label": "YUL DA_SE",
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"name": "YUL Dep/Arr S/E",
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"tag": "Aircraft",
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"group": "AIRCRAFT",
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"frequency": 118900000
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}
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]
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}
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]
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}
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``` |