music-kraken-core/notes.md
Lars Noack ef299d534c dfsaf
2023-01-09 10:46:05 +01:00

3.3 KiB

TO DO

  • Create a super class for audio_source, from which yet to come classes like Musify or Youtube inherit.
  • be able to select multiple things at once (eg "0, 3, 5, 6") and then download this selection with ok
  • add the file system as audio source
  • add complete search of musify (scraping of artist page etc.) as last resort
  • add a check if the songs truly are the same with non changebal attributes (length etc.)
  • get additional ISRCs
  • add Deezer as additional source
  • add a config file where you should be able to set:
    • folder structure (genre/artist/release/track.mp3 eg.)
    • proxies (maybe a boolean if tor should be enabled)
    • toggling of audio sources and sorting priorities of audio sources

Which "Modules" do I have

Overview

  • fetching of metadata
  • creating the target paths/filenames
  • fetching of the download sourced
  • downloading of the mp3
  • fetching of the lyrics

Naming and Structure of Modules

  • utils
    • shared (equivalent to global variables and constants)
    • config
    • database
    • some static methods that are in general usefull for me
  • tagging
    • song (within a class Song used to get and set the metadata of mp3 files)
  • metadata
    • search
    • fetch
  • target
  • audio_source
    • fetch_source
    • fetch_audio
    • sources
      • musify
      • youtube
  • lyrics
    • lyrics
    • genius (will eventually be moved in a folder with lyric sources)

Wrong Audio

  • Crystal F - Hanging Man

Did not found whole release

  • Crystal F - Trail Mix 2 (Vollmond)
  • Crystal F - Was ist blos mit Hauke los
  • Psychonaut 4 - Neurasthenia (Sweet Decadence)

Audio Formats

Wikipedia

It is important to distinguish between the audio coding format, the container containing the raw audio data, and an audio codec.

audio coding format

Wikipedia

The audio coding format is a format, which tries to store audio in a minimal space, while still allowing a decent quality.

There are two types:

  1. lossless compression
  2. lossy compression

Here a comperison of audio coding formats.

The two criterias, which NEED to be met is:

  1. open source
  2. the encoder as well as the player need to be free to use

container

Wikipedia

A container embeddes the metadata in a file. In this case I am interested in containers regarding audio.

considerations

Important differences between container, that I need to consider when choosing one, cuz I only implement this shit once, are:

  1. advanced content, meaning which fields there are, for example title, length, ...
  2. popularity (the more poppular it is, the better will be the support between different software)
  3. support for different codec features (older codecs might not support newer frames)
  4. overhead (different file size with different data, though this certainly is less an issue with audio)
  5. support streaming the media

These destinctions are sorted from top to bottom.

audio codec

Wikipedia

The audio codec is simply software/hardware, to convert audio from an audio coding format to playable audio and vice versa.