Albums with artist collaborations incorrectly split despite "Album Artist" tag

[SebDominguez]

Issue:

I am experiencing an issue with how Black Candy handles albums that feature multiple artists. Currently, if an album contains collaborations, Black Candy splits the album and does not group it using the "Album Artist" tag. Instead, it places the collaborative tracks under a separate album labeled "Various Artists." This results in the same album being displayed twice in the library.

Expected Behavior:

If the "Album Artist" tag is present, Black Candy should not split the album. It should use the "Album Artist" tag to group the album correctly. Additionally, it might be beneficial for Black Candy to check for the iTunes Compilation tag (though it may be non-standard) to accurately group albums under "Various Artists."

Suggested Solution:

Use the "Album Artist" tag to group the entire album if it is present. Optionally, check for the iTunes Compilation tag to better handle "Various Artists" albums.

Using Black Candy Version: 3.1.0.

METADATA block #0
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  length: 34
  minimum blocksize: 8192 samples
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  total samples: 25583360
  MD5 signature: 4b945c6bc4c62bd7c3ab169a72bf9807
METADATA block #1
  type: 4 (VORBIS_COMMENT)
  is last: false
  length: 1327
  vendor string: Lavf58.20.100
  comments: 40
    comment[0]: ALBUM=Hyperdrama
    comment[1]: TOTALTRACKS=13
    comment[2]: UPC=5056556138020
    comment[3]: DATE=2024-04-26
    comment[4]: ALBUMARTIST=Justice
    comment[5]: COPYRIGHT=2023 Genesis under exclusive license to Ed Banger Records / Because Music 2023 Genesis under exclusive license to Ed Banger Records / Because Music
    comment[6]: TRACKNUMBER=1
    comment[7]: YEAR=2024
    comment[8]: TOTALDISCS=1
    comment[9]: TITLE=Neverender
    comment[10]: ENCODER=Lavf58.20.100
    comment[11]: MEDIA=CD
    comment[12]: BARCODE=5056556133728
    comment[13]: ARTIST=Justice starring Tame Impala
    comment[14]: DISCNUMBER=1
    comment[15]: ISRC=FR8EU2300010
    comment[16]: LABEL=Because Music
    comment[17]: LABEL=Ed Banger Records
    comment[18]: LABEL=Genesis
    comment[19]: MUSICBRAINZ_RELEASEGROUPID=08110ae5-16bc-4baf-900c-9ce04c9a9e40
    comment[20]: ORIGINALDATE=2024-04-26
    comment[21]: ORIGINALYEAR=2024
    comment[22]: RELEASETYPE=album
    comment[23]: MUSICBRAINZ_ALBUMID=9791d0d9-99b1-4967-a33f-c07564d3e7b2
    comment[24]: MUSICBRAINZ_ALBUMARTISTID=860b2707-6153-4e3a-aa57-74d2b42c55b5
    comment[25]: ALBUMARTISTSORT=Justice
    comment[26]: SCRIPT=Latn
    comment[27]: RELEASECOUNTRY=XW
    comment[28]: CATALOGNUMBER=BEC5613372
    comment[29]: CATALOGNUMBER=EDLP2024-1
    comment[30]: RELEASESTATUS=official
    comment[31]: MUSICBRAINZ_TRACKID=aadeced3-ae64-4ef7-afce-2d72cfddfd80
    comment[32]: MUSICBRAINZ_ARTISTID=860b2707-6153-4e3a-aa57-74d2b42c55b5
    comment[33]: MUSICBRAINZ_ARTISTID=63aa26c3-d59b-4da4-84ac-716b54f1ef4d
    comment[34]: ARTISTSORT=Justice starring Tame Impala
    comment[35]: ARTISTS=Justice
    comment[36]: ARTISTS=Tame Impala
    comment[37]: MUSICBRAINZ_RELEASETRACKID=7faf5bf1-9f7f-4bf9-997a-e7a1c3228ff7
    comment[38]: TRACKTOTAL=13
    comment[39]: DISCTOTAL=1