├── .codecov.yml ├── .gitignore ├── .gitattributes ├── src └── spectro │ ├── __init__.py │ ├── cli.py │ └── _main.py ├── .flake8 ├── tests ├── samples │ ├── README.md │ ├── 128.mp3 │ ├── 16.mp3 │ ├── 192.mp3 │ ├── 256.mp3 │ ├── 32.mp3 │ ├── 320.mp3 │ ├── 64.mp3 │ ├── 96.mp3 │ └── Yamaha-V50-Ride-Pattern-120bpm.wav └── test_all.py ├── pyproject.toml ├── tox.ini ├── .pre-commit-config.yaml ├── CONTRIBUTING.md ├── justfile ├── .github └── workflows │ └── ci.yml ├── setup.cfg ├── README.md ├── CODE_OF_CONDUCT.md └── LICENSE /.codecov.yml: -------------------------------------------------------------------------------- 1 | comment: no 2 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | .tox/ 2 | src/*.egg-info/ 3 | build/ 4 | dist/ 5 | -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | *.wav filter=lfs diff=lfs merge=lfs -text 2 | *.mp3 filter=lfs diff=lfs merge=lfs -text 3 | -------------------------------------------------------------------------------- /src/spectro/__init__.py: -------------------------------------------------------------------------------- 1 | from . import cli 2 | from ._main import check, show 3 | 4 | __all__ = ["cli", "check", "show"] 5 | -------------------------------------------------------------------------------- /.flake8: -------------------------------------------------------------------------------- 1 | [flake8] 2 | ignore = E203, E266, E501, W503 3 | max-line-length = 80 4 | max-complexity = 18 5 | select = B,C,E,F,W,T4,B9 6 | -------------------------------------------------------------------------------- /tests/samples/README.md: -------------------------------------------------------------------------------- 1 | The file `Yamaha-V50-Ride-Pattern-120bpm.wav` is taken from 2 | https://freewavesamples.com/yamaha-v50-ride-pattern-120-bpm. 3 | -------------------------------------------------------------------------------- /tests/samples/128.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:f75f7e826b206775437c83f1f854cc4db35fcaaec856336fcd6f05be24a8bfa0 3 | size 33151 4 | -------------------------------------------------------------------------------- /tests/samples/16.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:89e78e026f0907be1b9312981ab94b8f5d643d1ea67bfc5ec17d24f86c8ca0af 3 | size 8492 4 | -------------------------------------------------------------------------------- /tests/samples/192.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:38157775fa5e6b47b69776eb4010d0f22e3333a28bae27add90c9d41d782298f 3 | size 49661 4 | -------------------------------------------------------------------------------- /tests/samples/256.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:c292a704185bebfc364419ecc685f8670d189fdab2298e3db875920106af64bf 3 | size 66170 4 | -------------------------------------------------------------------------------- /tests/samples/32.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:a825f80b65bef0d6ce21a18f372747a7cd17d7566221a676ccbdd2c61886e0cd 3 | size 8492 4 | -------------------------------------------------------------------------------- /tests/samples/320.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:94f0d08c687abc522fdf9be48ceea24c3ca820bf12fc9d1361391178d52eb436 3 | size 82680 4 | -------------------------------------------------------------------------------- /tests/samples/64.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:2f361463ecaa5eca3498ee8df2c5152e2d372aef9fa8bc8f67d70a14d9d0adcc 3 | size 16642 4 | -------------------------------------------------------------------------------- /tests/samples/96.mp3: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:fb0266954028c03fa88b95b5e0036a9c09c4edf8e880f2fad9ba36862be1ea79 3 | size 24898 4 | -------------------------------------------------------------------------------- /pyproject.toml: -------------------------------------------------------------------------------- 1 | [build-system] 2 | requires = ["setuptools>=42", "wheel"] 3 | build-backend = "setuptools.build_meta" 4 | 5 | [tool.isort] 6 | profile = "black" 7 | -------------------------------------------------------------------------------- /tests/samples/Yamaha-V50-Ride-Pattern-120bpm.wav: -------------------------------------------------------------------------------- 1 | version https://git-lfs.github.com/spec/v1 2 | oid sha256:ad5e52efc09a3172f31a54862b5be82f30b4b40b46c80c31642ce46dc9bbb4c3 3 | size 352112 4 | -------------------------------------------------------------------------------- /tox.ini: -------------------------------------------------------------------------------- 1 | [tox] 2 | envlist = py3 3 | isolated_build = True 4 | 5 | [testenv] 6 | deps = 7 | pytest 8 | pytest-cov 9 | extras = all 10 | commands = 11 | pytest {posargs} 12 | -------------------------------------------------------------------------------- /.pre-commit-config.yaml: -------------------------------------------------------------------------------- 1 | repos: 2 | - repo: https://github.com/PyCQA/isort 3 | rev: 5.9.1 4 | hooks: 5 | - id: isort 6 | 7 | - repo: https://github.com/python/black 8 | rev: 21.6b0 9 | hooks: 10 | - id: black 11 | language_version: python3 12 | 13 | - repo: https://gitlab.com/pycqa/flake8 14 | rev: 3.9.2 15 | hooks: 16 | - id: flake8 17 | -------------------------------------------------------------------------------- /tests/test_all.py: -------------------------------------------------------------------------------- 1 | import pathlib 2 | 3 | import spectro 4 | 5 | this_dir = pathlib.Path(__file__).resolve().parent 6 | 7 | 8 | def test_cli_show(): 9 | input_file = this_dir / "samples" / "16.mp3" 10 | spectro.cli.main(["show", str(input_file)]) 11 | 12 | 13 | def test_cli_check(): 14 | input_file = this_dir / "samples" / "16.mp3" 15 | spectro.cli.main(["check", str(input_file)]) 16 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # spectro contributing guidelines 2 | 3 | The spectro community appreciates your contributions via issues and 4 | pull requests. Note that the [code of conduct](CODE_OF_CONDUCT.md) 5 | applies to all interactions with the spectro project, including 6 | issues and pull requests. 7 | 8 | When submitting pull requests, please follow the style guidelines of 9 | the project, ensure that your code is tested and documented, and write 10 | good commit messages, e.g., following [these 11 | guidelines](https://chris.beams.io/posts/git-commit/). 12 | 13 | By submitting a pull request, you are licensing your code under the 14 | project [license](LICENSE) and affirming that you either own copyright 15 | (automatic for most individuals) or are authorized to distribute under 16 | the project license (e.g., in case your employer retains copyright on 17 | your work). 18 | -------------------------------------------------------------------------------- /justfile: -------------------------------------------------------------------------------- 1 | version := `python3 -c "from configparser import ConfigParser; p = ConfigParser(); p.read('setup.cfg'); print(p['metadata']['version'])"` 2 | name := `python3 -c "from configparser import ConfigParser; p = ConfigParser(); p.read('setup.cfg'); print(p['metadata']['name'])"` 3 | 4 | 5 | default: 6 | @echo "\"just publish\"?" 7 | 8 | tag: 9 | @if [ "$(git rev-parse --abbrev-ref HEAD)" != "main" ]; then exit 1; fi 10 | curl -H "Authorization: token `cat ~/.github-access-token`" -d '{"tag_name": "{{version}}"}' https://api.github.com/repos/nschloe/{{name}}/releases 11 | 12 | upload: clean 13 | @if [ "$(git rev-parse --abbrev-ref HEAD)" != "main" ]; then exit 1; fi 14 | # https://stackoverflow.com/a/58756491/353337 15 | python3 -m build --sdist --wheel . 16 | twine upload dist/* 17 | 18 | publish: tag upload 19 | 20 | clean: 21 | @find . | grep -E "(__pycache__|\.pyc|\.pyo$)" | xargs rm -rf 22 | @rm -rf src/*.egg-info/ build/ dist/ .tox/ 23 | 24 | format: 25 | isort . 26 | black . 27 | blacken-docs README.md 28 | 29 | lint: 30 | black --check . 31 | flake8 . 32 | -------------------------------------------------------------------------------- /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | name: ci 2 | 3 | on: 4 | push: 5 | branches: 6 | - main 7 | pull_request: 8 | branches: 9 | - main 10 | 11 | jobs: 12 | lint: 13 | runs-on: ubuntu-latest 14 | steps: 15 | - name: Check out repo 16 | uses: actions/checkout@v2 17 | - name: Set up Python 18 | uses: actions/setup-python@v2 19 | - name: Run pre-commit 20 | uses: pre-commit/action@v2.0.3 21 | 22 | build: 23 | runs-on: ubuntu-latest 24 | strategy: 25 | matrix: 26 | python-version: ["3.8", "3.9", "3.10-dev"] 27 | steps: 28 | - uses: actions/setup-python@v2 29 | with: 30 | python-version: ${{ matrix.python-version }} 31 | - uses: actions/checkout@v2 32 | with: 33 | lfs: true 34 | - name: Install system dependencies 35 | run: sudo apt install ffmpeg 36 | - name: Test with tox 37 | run: | 38 | pip install tox 39 | tox -- --cov spectro --cov-report xml --cov-report term 40 | - uses: codecov/codecov-action@v1 41 | if: ${{ matrix.python-version == '3.9' }} 42 | -------------------------------------------------------------------------------- /setup.cfg: -------------------------------------------------------------------------------- 1 | [metadata] 2 | name = spectro 3 | version = 0.2.0 4 | author = Nico Schlömer 5 | author_email = nico.schloemer@gmail.com 6 | description = Audio file spectral analysis 7 | url = https://github.com/nschloe/spectro 8 | project_urls = 9 | Code=https://github.com/nschloe/spectro 10 | Issues=https://github.com/nschloe/spectro/issues 11 | Funding=https://github.com/sponsors/nschloe 12 | long_description = file: README.md 13 | long_description_content_type = text/markdown 14 | license = GPL-3.0-or-later 15 | classifiers = 16 | Development Status :: 4 - Beta 17 | Intended Audience :: Science/Research 18 | License :: OSI Approved :: MIT License 19 | Operating System :: OS Independent 20 | Programming Language :: Python :: 3 21 | Programming Language :: Python :: 3.8 22 | Programming Language :: Python :: 3.9 23 | Programming Language :: Python :: 3.10 24 | Topic :: Scientific/Engineering 25 | Topic :: Utilities 26 | 27 | [options] 28 | package_dir = 29 | =src 30 | packages = find: 31 | install_requires = 32 | matplotlib 33 | mutagen 34 | numpy 35 | pydub 36 | rich 37 | scipy 38 | python_requires = >=3.8 39 | 40 | [options.packages.find] 41 | where=src 42 | 43 | [options.entry_points] 44 | console_scripts = 45 | spectro = spectro.cli:main 46 | -------------------------------------------------------------------------------- /src/spectro/cli.py: -------------------------------------------------------------------------------- 1 | import argparse 2 | from importlib import metadata 3 | from sys import version_info 4 | 5 | from . import _main 6 | 7 | 8 | def main(argv=None): 9 | parent_parser = argparse.ArgumentParser( 10 | description="Audio spectrum analysis.", 11 | formatter_class=argparse.RawTextHelpFormatter, 12 | ) 13 | 14 | parent_parser.add_argument( 15 | "--version", 16 | "-v", 17 | action="version", 18 | version=_get_version_text(), 19 | help="display version information", 20 | ) 21 | 22 | subparsers = parent_parser.add_subparsers( 23 | title="subcommands", dest="command", required=True 24 | ) 25 | 26 | parser = subparsers.add_parser( 27 | "show", help="Show frequency spectrum", aliases=["s"] 28 | ) 29 | parser.add_argument("filename", type=str, help="audio file to analyze") 30 | parser.add_argument( 31 | "-c", 32 | "--channel", 33 | default=None, 34 | type=int, 35 | help="only show one particular channel (default: show all channels)", 36 | ) 37 | parser.add_argument( 38 | "-w", 39 | "--num-windows", 40 | default=300, 41 | type=int, 42 | help="number of windows (x-axis resolution, default: 300)", 43 | ) 44 | parser.add_argument( 45 | "-f", 46 | "--num-frequencies", 47 | default=300, 48 | type=int, 49 | help="number of frequencies (y-axis resolution, default: 300)", 50 | ) 51 | parser.add_argument( 52 | "-o", 53 | "--outfile", 54 | default=None, 55 | type=str, 56 | help="output file (default: show on screen)", 57 | ) 58 | parser.set_defaults( 59 | func=lambda args: _main.show( 60 | args.filename, 61 | num_windows=args.num_windows, 62 | num_frequencies=args.num_frequencies, 63 | channel=args.channel, 64 | outfile=args.outfile, 65 | ) 66 | ) 67 | 68 | parser = subparsers.add_parser("check", help="Check frequency range", aliases=["c"]) 69 | parser.add_argument("path", type=str, help="audio file or directory to analyze") 70 | parser.set_defaults(func=lambda args: _main.check(args.path)) 71 | 72 | args = parent_parser.parse_args(argv) 73 | 74 | return args.func(args) 75 | 76 | 77 | def _get_version_text(): 78 | __version__ = metadata.version("spectro") 79 | python_version = f"{version_info.major}.{version_info.minor}.{version_info.micro}" 80 | return "\n".join( 81 | [ 82 | f"spectro {__version__} [Python {python_version}]", 83 | "Copyright (c) 2020-2021 Nico Schlömer", 84 | ] 85 | ) 86 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 |

2 | spectro 3 |

Delicious audio file spectrograms.

4 |

5 | 6 | [![PyPi Version](https://img.shields.io/pypi/v/spectro.svg?style=flat-square)](https://pypi.org/project/spectro) 7 | [![PyPI pyversions](https://img.shields.io/pypi/pyversions/spectro.svg?style=flat-square)](https://pypi.org/pypi/spectro/) 8 | [![GitHub stars](https://img.shields.io/github/stars/nschloe/spectro.svg?style=flat-square&logo=github&label=Stars&logoColor=white)](https://github.com/nschloe/spectro) 9 | [![PyPi downloads](https://img.shields.io/pypi/dm/spectro.svg?style=flat-square)](https://pypistats.org/packages/spectro) 10 | 11 | [![gh-actions](https://img.shields.io/github/workflow/status/nschloe/spectro/ci?style=flat-square)](https://github.com/nschloe/spectro/actions?query=workflow%3Aci) 12 | [![codecov](https://img.shields.io/codecov/c/github/nschloe/spectro.svg?style=flat-square)](https://codecov.io/gh/nschloe/spectro) 13 | [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg?style=flat-square)](https://github.com/psf/black) 14 | 15 | spectro is a collection of easy-to-use Python and command-line tools for analyzing audio 16 | files. Install from [PyPi](https://pypi.org/project/spectro/) with 17 | ``` 18 | pip install spectro 19 | ``` 20 | and use with 21 | ```bash 22 | spectro show filename.mp3 # shows the wave spectrum of the audio file 23 | spectro check {dirname or filename.mp3} # checks if the audio file is worse than it pretends to be 24 | ``` 25 | See `-h` for their respective command-line arguments. 26 | 27 | The quality of MP3 files is typically determined by their bitrate. For audio files, *128 28 | kbps* (kilobit per second) is considered low quality, *320 kbps* is considered high 29 | quality. It is of course possible to re-encode a low-quality MP3 with a higher bitrate 30 | or even a WAV file. spectro can help singling out those foul eggs. 31 | 32 | Here is the `spectro show` output of a [sample 33 | file](https://nschloe.github.io/spectro/Yamaha-V50-Ride-Pattern-120bpm.wav) (only first 34 | channel shown): 35 | 36 | | | 37 | :-------------------:|:------------------:|:--------------:| 38 | Full-quality WAV | 320 kbps MP3 | 256 kbps MP3 | 39 | | | 40 | | 192 kbps MP3 | 128 kbps MP3 | 96 kbps MP3 | 41 | | | 42 | | 64 kbps MP3 | 32 kbps MP3 | 16 kbps MP3 | 43 | -------------------------------------------------------------------------------- /CODE_OF_CONDUCT.md: -------------------------------------------------------------------------------- 1 | # spectro Code of Conduct 2 | 3 | ## Our Pledge 4 | 5 | In the interest of fostering an open and welcoming environment, we as 6 | contributors and maintainers pledge to making participation in our project and 7 | our community a harassment-free experience for everyone, regardless of age, body 8 | size, disability, ethnicity, sex characteristics, gender identity and expression, 9 | level of experience, education, socio-economic status, nationality, personal 10 | appearance, race, religion, or sexual identity and orientation. 11 | 12 | ## Our Standards 13 | 14 | Examples of behavior that contributes to creating a positive environment 15 | include: 16 | 17 | * Using welcoming and inclusive language 18 | * Being respectful of differing viewpoints and experiences 19 | * Gracefully accepting constructive criticism 20 | * Focusing on what is best for the community 21 | * Showing empathy towards other community members 22 | 23 | Examples of unacceptable behavior by participants include: 24 | 25 | * The use of sexualized language or imagery and unwelcome sexual attention or 26 | advances 27 | * Trolling, insulting/derogatory comments, and personal or political attacks 28 | * Public or private harassment 29 | * Publishing others' private information, such as a physical or electronic 30 | address, without explicit permission 31 | * Other conduct which could reasonably be considered inappropriate in a 32 | professional setting 33 | 34 | ## Our Responsibilities 35 | 36 | Project maintainers are responsible for clarifying the standards of acceptable 37 | behavior and are expected to take appropriate and fair corrective action in 38 | response to any instances of unacceptable behavior. 39 | 40 | Project maintainers have the right and responsibility to remove, edit, or 41 | reject comments, commits, code, wiki edits, issues, and other contributions 42 | that are not aligned to this Code of Conduct, or to ban temporarily or 43 | permanently any contributor for other behaviors that they deem inappropriate, 44 | threatening, offensive, or harmful. 45 | 46 | ## Scope 47 | 48 | This Code of Conduct applies within all project spaces, and it also applies when 49 | an individual is representing the project or its community in public spaces. 50 | Examples of representing a project or community include using an official 51 | project e-mail address, posting via an official social media account, or acting 52 | as an appointed representative at an online or offline event. Representation of 53 | a project may be further defined and clarified by project maintainers. 54 | 55 | ## Enforcement 56 | 57 | Instances of abusive, harassing, or otherwise unacceptable behavior may be 58 | reported by contacting the project team at [INSERT EMAIL ADDRESS]. All 59 | complaints will be reviewed and investigated and will result in a response that 60 | is deemed necessary and appropriate to the circumstances. The project team is 61 | obligated to maintain confidentiality with regard to the reporter of an incident. 62 | Further details of specific enforcement policies may be posted separately. 63 | 64 | Project maintainers who do not follow or enforce the Code of Conduct in good 65 | faith may face temporary or permanent repercussions as determined by other 66 | members of the project's leadership. 67 | 68 | ## Attribution 69 | 70 | This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, 71 | available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html 72 | 73 | [homepage]: https://www.contributor-covenant.org 74 | 75 | For answers to common questions about this code of conduct, see 76 | https://www.contributor-covenant.org/faq 77 | 78 | -------------------------------------------------------------------------------- /src/spectro/_main.py: -------------------------------------------------------------------------------- 1 | import pathlib 2 | from typing import Optional 3 | 4 | import matplotlib.colors as colors 5 | import matplotlib.pyplot as plt 6 | import numpy 7 | from mutagen.mp3 import MP3 8 | from pydub import AudioSegment 9 | from rich.console import Console 10 | from scipy import signal 11 | 12 | 13 | def show( 14 | filename: str, 15 | min_freq: float = 1.0e-2, 16 | num_windows: Optional[int] = None, 17 | num_frequencies: Optional[int] = None, 18 | channel: Optional[int] = None, 19 | outfile: Optional[str] = None, 20 | ): 21 | track = AudioSegment.from_file(filename) 22 | 23 | assert track.channels is not None 24 | out = numpy.array(track.get_array_of_samples()).reshape(-1, track.channels) 25 | 26 | channels = range(out.shape[1]) if channel is None else [channel - 1] 27 | 28 | if num_windows is None: 29 | nperseg = None 30 | else: 31 | nperseg = int(round(track.duration_seconds / num_windows * track.frame_rate)) 32 | 33 | for i, k in enumerate(channels): 34 | # Perhaps one can downsample this. 35 | # https://stackoverflow.com/q/60866162/353337 36 | f, t, Sxx = signal.spectrogram( 37 | out[:, k], 38 | fs=track.frame_rate, 39 | scaling="spectrum", 40 | mode="magnitude", 41 | nperseg=nperseg, 42 | ) 43 | 44 | if num_frequencies is not None: 45 | # ditch some of the frequencies 46 | f_step = -(-f.shape[0] // num_frequencies) 47 | f = f[::f_step] 48 | Sxx = Sxx[::f_step] 49 | 50 | # Make sure all values are positive for the log scaling 51 | smallest_positive = numpy.min(Sxx[Sxx > 0]) 52 | Sxx[Sxx < smallest_positive] = smallest_positive 53 | 54 | plt.subplot(1, len(channels), i + 1) 55 | plt.pcolormesh( 56 | t, 57 | f, 58 | Sxx, 59 | norm=colors.LogNorm(vmin=min_freq, vmax=Sxx.max()), 60 | shading="auto", 61 | ) 62 | plt.title(f"Channel {k + 1}") 63 | if k == 0: 64 | plt.ylabel("Frequency [Hz]") 65 | plt.xlabel("Time [sec]") 66 | plt.colorbar() 67 | 68 | plt.gcf().suptitle(f"{filename} ({track.channels} channels, {track.frame_rate} Hz)") 69 | if outfile is None: 70 | plt.show() 71 | else: 72 | plt.savefig(outfile, transparent=True, bbox_inches="tight") 73 | 74 | 75 | def check(path, **kwargs): 76 | path = pathlib.Path(path) 77 | if path.is_file(): 78 | _check_file(path, **kwargs) 79 | return 80 | 81 | assert path.is_dir() 82 | for p in path.glob("**/*"): 83 | if p.suffix in [".mp3", ".wav", ".flac"]: 84 | _check_file(p, **kwargs) 85 | 86 | 87 | def _check_file(filename, window_length_s: float = 0.05, channel: int = 0): 88 | track = AudioSegment.from_file(filename) 89 | 90 | assert track.channels is not None 91 | out = numpy.array(track.get_array_of_samples()).reshape(-1, track.channels) 92 | 93 | if window_length_s is None: 94 | nperseg = None 95 | else: 96 | nperseg = int(round(window_length_s * track.frame_rate)) 97 | 98 | # Use the first channel by default 99 | f, _, Sxx = signal.spectrogram( 100 | out[:, channel], 101 | fs=track.frame_rate, 102 | scaling="spectrum", 103 | mode="magnitude", 104 | # nperseg=window_length_samples 105 | nperseg=nperseg, 106 | # noverlap=noverlap 107 | ) 108 | # Make sure all values are positive for the log scaling 109 | smallest_positive = numpy.min(Sxx[Sxx > 0]) 110 | Sxx[Sxx < smallest_positive] = smallest_positive 111 | # Which row surpasses the average first? 112 | log_Sxx = numpy.log10(Sxx) 113 | avg_log_Sxx = numpy.average(log_Sxx) 114 | count = numpy.sum(log_Sxx > avg_log_Sxx, axis=1) 115 | k = numpy.where(count > log_Sxx.shape[1] / 8)[0][-1] 116 | 117 | console = Console() 118 | 119 | # What do we expect? 120 | # https://stackoverflow.com/a/287944/353337 121 | filename = pathlib.Path(filename) 122 | if filename.suffix in [".wav", ".flac"]: 123 | if f[k] > 19000: 124 | console.print(f"[green]{filename} seems good.") 125 | else: 126 | console.print( 127 | f"[red]{filename} is WAV, but has max frequency " 128 | f"about {f[k]:.0f} Hz. Check with spectro show." 129 | ) 130 | elif filename.suffix == ".mp3": 131 | mp3_file = MP3(filename) 132 | bitrate = int(mp3_file.info.bitrate / 1000) 133 | bitrate_to_min_max_freq = { 134 | 0: 0, 135 | 16: 4000, 136 | 64: 10000, 137 | 128: 15000, 138 | 192: 16000, 139 | 320: 18000, 140 | } 141 | 142 | for key, val in bitrate_to_min_max_freq.items(): 143 | if bitrate < key: 144 | break 145 | expected_max_freq = val 146 | 147 | if f[k] > expected_max_freq: 148 | console.print(f"[green]{filename} seems good [{bitrate} kbps].") 149 | else: 150 | console.print( 151 | f"[red]{filename} is MP3 [{bitrate} kbps], but has max frequency " 152 | f"about {f[k]:.0f} Hz. Check with speck-show." 153 | ) 154 | 155 | else: 156 | console.print(f"[italic]Don't know what to expect for {filename}.") 157 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Patents. 472 | 473 | A "contributor" is a copyright holder who authorizes use under this 474 | License of the Program or a work on which the Program is based. The 475 | work thus licensed is called the contributor's "contributor version". 476 | 477 | A contributor's "essential patent claims" are all patent claims 478 | owned or controlled by the contributor, whether already acquired or 479 | hereafter acquired, that would be infringed by some manner, permitted 480 | by this License, of making, using, or selling its contributor version, 481 | but do not include claims that would be infringed only as a 482 | consequence of further modification of the contributor version. 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You may not convey a covered 525 | work if you are a party to an arrangement with a third party that is 526 | in the business of distributing software, under which you make payment 527 | to the third party based on the extent of your activity of conveying 528 | the work, and under which the third party grants, to any of the 529 | parties who would receive the covered work from you, a discriminatory 530 | patent license (a) in connection with copies of the covered work 531 | conveyed by you (or copies made from those copies), or (b) primarily 532 | for and in connection with specific products or compilations that 533 | contain the covered work, unless you entered into that arrangement, 534 | or that patent license was granted, prior to 28 March 2007. 535 | 536 | Nothing in this License shall be construed as excluding or limiting 537 | any implied license or other defenses to infringement that may 538 | otherwise be available to you under applicable patent law. 539 | 540 | 12. No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------