Source: Spotify
From Very High Quality Spotify Source on AAC M4A Container

Complete name : [KillerSpit23] Fantastic Departure! SpotifyRIP\1. Fantastic Departure!.m4a
Format : MPEG-4
Format profile : Apple audio with iTunes info
Codec ID : M4A (M4A /mp42/isom)
File size : 12.4 MiB
Duration : 5 min 24 s
Overall bit rate mode : Variable
Overall bit rate : 321 kb/s
Album : Fantastic Departure!
Track name : Fantastic Departure!
Track name/Position : 1
Performer : Aqours
Genre : JPop
Recorded date : 2020
Encoded date : UTC 2020-07-22 05:20:29
Tagged date : UTC 2020-07-22 05:21:07
Writing application : qaac 2.67, CoreAudioToolbox 7.10.9.0, AAC-LC Encoder, TVBR q127, Quality 96
Cover : Yes
Encoding Params : (Binary)

Audio
ID : 1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 5 min 24 s
Bit rate mode : Variable
Bit rate : 308 kb/s
Maximum bit rate : 347 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 11.9 MiB (96%)
Encoded date : UTC 2020-07-22 05:20:29
Tagged date : UTC 2020-07-22 05:21:07

Complete name : [KillerSpit23] Fantastic Departure! SpotifyRIP\2. Aqours Pirates Desire.m4a
Format : MPEG-4
Format profile : Apple audio with iTunes info
Codec ID : M4A (M4A /mp42/isom)
File size : 9.65 MiB
Duration : 4 min 12 s
Overall bit rate mode : Variable
Overall bit rate : 321 kb/s
Album : Fantastic Departure!
Album/Performer : Aqours
Track name : Aqours Pirates Desire
Track name/Position : 2
Performer : Aqours
Composer : Kanata Okajima and MEG
Genre : JPop
Recorded date : 2020
Encoded date : UTC 2020-07-22 05:21:17
Tagged date : UTC 2020-07-22 05:21:23
Writing application : qaac 2.67, CoreAudioToolbox 7.10.9.0, AAC-LC Encoder, TVBR q127, Quality 96 / dBpoweramp Release 16.1
Copyright : Lantis Inc.
Cover : Yes
Arranged By: : MEG
Written By: : Hata Aki
Encoding Params : (Binary)

Audio
ID : 1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 4 min 12 s
Bit rate mode : Variable
Bit rate : 305 kb/s
Maximum bit rate : 334 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 9.17 MiB (95%)
Encoded date : UTC 2020-07-22 05:21:17
Tagged date : UTC 2020-07-22 05:21:23

Still waiting for FLAC release here