icad-tone-detection 2.7.1

A Python library for extracting scanner radio tones from scanner audio.

icad_tone_detection

Detect Two-Tone (Quick Call), long tones, hi-low warble tones, MDC1200 / FleetSync and DTMF in scanner-audio recordings.
The heavy DSP is performed by an included native binary (icad_decode) while the Python layer handles audio I/O and STFT-based frequency extraction.

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Features

• Single call tone_detect() or the CLI icad-tone-detect.
• Tone types: Two-Tone / Quick Call, long, warble, MDC1200 / FleetSync, DTMF.
• Flexible inputs: local path, URL, bytes, BytesIO, or a pydub.AudioSegment.
• Automatic resample to 16 kHz mono PCM via FFmpeg.
• Tweakable: every threshold & filter exposed as a keyword arg / CLI flag.
• Binaries included
  • Linux x86-64, arm64, armv7
  • macOS Intel & Apple Silicon
  • Windows x86-64

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Installation

pip install icad_tone_detection

Requires Python 3.9 + and FFmpeg in PATH.

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Quick start (Python)

from icad_tone_detection import tone_detect

result = tone_detect("my_scanner_recording.wav")
print(result.two_tone_result)

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Quick start (CLI)

An executable icad-tone-detect is added to your $PATH:

# show help
icad-tone-detect --help

# analyse a file with MDC disabled
icad-tone-detect my.wav --detect_mdc false --debug

Boolean flags accept true/false • yes/no • 1/0.

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Full CLI example

icad-tone-detect my_scanner_recording.wav \
--detect_mdc false    --detect_dtmf true \
--time_resolution_ms 25 --tone_a_min_length 0.7 \
--tone_b_min_length 2.7 --long_tone_min_length 3.8 \
--debug

Typical output with debug ⇣

D############################################################
ICAD Tone Detection: DEBUG - v2.7.1
------------------------------------------------------------
Decode binary path:        /…/bin/linux_arm64/icad_decode
Analyzing audio at:        my_scanner_recording.wav
Matching Threshold:        2.5%
Time Resolution (ms):      25
… (trimmed) …
############################################################
------------------------------------------------------------
DETECTION SUMMARY
------------------------------------------------------------
Two-Tone (Quick Call): 1
Long Tones:            0
Hi-Low Warble:         0
MDC1200/FleetSync:     0   (disabled)
DTMF:                  3
------------------------------------------------------------
{
  "two_tone": [
    {
      "tone_a_freq": 473.2,
      "tone_b_freq": 810.0,
      "start": 1.23,
      "end": 4.07
    }
  ],
  "long_tone": [],
  "hi_low": [],
  "mdc": [],
  "dtmf": [
    { "digit": "5", "start": 7.01, "end": 7.08 },
    { "digit": "5", "start": 7.18, "end": 7.25 },
    { "digit": "9", "start": 7.35, "end": 7.42 }
  ]
}

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tone_detect() signature (API users)

result = tone_detect(
  audio_path="my.wav",         # path / URL / BytesIO / AudioSegment
  matching_threshold=2.5,      # % tolerance for grouping freqs
  time_resolution_ms=50,       # STFT hop size in ms
  tone_a_min_length=0.85,      # sec  – min A-tone for Quick Call
  tone_b_min_length=2.6,       # sec  – min B-tone for Quick Call
  hi_low_interval=0.2,         # sec  – max gap between warble tones
  hi_low_min_alternations=6,   #       min hi/low swaps
  long_tone_min_length=3.8,    # sec  – min duration for long tone
  detect_mdc=True,             # toggle MDC1200 / FleetSync
  mdc_high_pass=200,           # Hz   – high-pass for MDC
  mdc_low_pass=4000,           # Hz   – low-pass  for MDC
  detect_dtmf=True,            # toggle DTMF decoding
  debug=False                  # print extra diagnostics
)  # -> ToneDetectionResult

See the doc-string for parameter details.

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Supported platforms & binaries

OS	Architectures	Folder inside wheel
Linux	x86-64, arm64, armv7	linux_x86_64, linux_arm64, linux_armv7
macOS	x86-64, arm64	macos_x86_64, macos_arm64
Windows	x86-64	windows_x86_64

The loader sets execute permissions automatically on Unix-like systems.
On other CPUs you can compile your own binary and point the library to it via ICAD_DECODE_PATH.

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Example audio

Sample WAV files live in examples/example_audio/ for quick testing.

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Contributing

Issues and pull-requests are welcome — visit the GitHub repo.

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License

MIT © TheGreatCodeholio • version 2.7.1 • Python 3.9 +