Multiple issues when downloading albums using multi-core

[martinguionniere]

Describe the bug
I noticed four issues when downloading multiple albums with multi-core :

• Some songs are longer or shorter than expected, creating either weird blanks at the end or fade outs where there was not (not great for songs that follow up each other) ;
• Some songs are weirdly mixed together, for example a song also contains the song that follows but the song that follows is also downloaded (usually correctly) ;
• Some songs are very quiet, with their quality being pretty bad compared to most songs ;
• Some songs are not the ones that should have been downloaded, maybe based on their title : I downloaded a song which name is "I. Overture" (from SDOIT album by Dream Theater) and the song downloaded was another song from the same band which contains "I. Overture" in its title ("Scene Two : I. Overture 1928" from SFAM album) ;

To Reproduce
I ran this script overnight :

export SPOTIPY_CLIENT_ID=<my_client_id>
export SPOTIPY_CLIENT_SECRET=<my_client_secret>
spotify_dl -mc 6 -l \
https://open.spotify.com/intl-fr/album/1S4j3gaVtQGvZciLp8z2do?si=34ebd0319f3640c4 \
https://open.spotify.com/intl-fr/album/1PhYHO7Pva9e1YQY5GQ8zx?si=3024064353ac426e \
https://open.spotify.com/intl-fr/album/1qD29n5sWzkZPnMOFSkCIC?si=efc4b00ebd10482a \
https://open.spotify.com/intl-fr/album/1i6DTKXsonvhHZYdLhIbk1?si=983d56d4000f4ab0 \
https://open.spotify.com/intl-fr/album/1ALR5shWvJ99oItXgRTbKj?si=b9ec4290d9b04b1b \
https://open.spotify.com/album/2QgGoL5VSQhPHudTObS7zK?si=vZvFCyToS1eiHs_fhYR2Pw \
https://open.spotify.com/album/4jP59Kwqvy3n09eUe1Cge7?si=faJaXO-3Q-qomp8ZUeCxfg \
https://open.spotify.com/album/1QZi8laY96nhaeGSklvN4D?si=vH_8AuJKTTWJADhbaEJp1w \
https://open.spotify.com/album/4INFVEhhhnLiqNR4MVPaX8?si=Cyp0x34TRRCIHd77UuVdBw \
https://open.spotify.com/album/1yAbzShRcY4muLKsX8UWxj?si=7qEFRDB5T3mtZeiCOIfTDA \
https://open.spotify.com/album/4v6kYkn7mYjlWS9vONmmCP?si=DEzrUGydS0eqEn9W56qLug \
https://open.spotify.com/album/5ORyMl3oua4PPIWXZVN8kz?si=Q9it5Gi8RRW1tok3v8--nQ \
https://open.spotify.com/album/7khFXQNBzcfSfgGjPKerdE?si=v72ERZPETvy0xKip-1s0Sw \
https://open.spotify.com/album/6nTSYgih82tTwdWvmbtPHW?si=mK98lSKRS6yTnXZ0IvM59w \
https://open.spotify.com/intl-fr/album/55tK4Ab7XHTOKkw0xDz3AA?si=dT7e1a7qSKu97vtS5Bo6rw \
https://open.spotify.com/intl-fr/album/7vfuTRXIAYJz5Uc8SddnTr?si=nMv4DZaiSX6q-cBcOidulQ \
https://open.spotify.com/intl-fr/album/3Id3VUk9jSKBD1guNo1buF?si=uyH0Rw3YTP-fJPmCvtE7GQ \
https://open.spotify.com/album/0jwnYwJz6XHNrVAYEclQPd?si=GJHXTLqFSU67stLsOTO2nA \
https://open.spotify.com/intl-fr/album/4J0mM68oLn1Iq8jN5PcCsZ?si=Ywo6Ew9KTnCbqmDFVbdfLQ \
https://open.spotify.com/intl-fr/album/6zZeOmDThwAPmZ9abY3Ygi?si=kFq7rtRgTJCj1Tb92Mustw \
https://open.spotify.com/intl-fr/album/4y896Qk80DxmG6vbMt57rk?si=BewbCg6bQSyqG74n2Bseeg \
https://open.spotify.com/intl-fr/album/1ErltKGNVk6hw9OWfSq6Xe?si=r2Moq9pDRIym70R5YcYncg \
https://open.spotify.com/intl-fr/album/3RZHKuP6hVRsHAVruUfDXE?si=rTfjLL5OS6GF1nriMo3r8w \
https://open.spotify.com/intl-fr/album/6DxbC5BG4iiktFTWbzqqIV?si=1v_L8FbeQ2y5i8NYw7Nruw \
https://open.spotify.com/intl-fr/album/7kW0cpKgSVsEqcc8xgbSb0?si=RZP7xKojR6ykZ-bmtZZeoA \
https://open.spotify.com/intl-fr/album/5szY4sBOSD6IFjFN1RtWTe?si=0d-Ibhe4RgiRc8DeMaDbwQ \
https://open.spotify.com/intl-fr/album/4LdquqwQoyu1pE6Vq8PIha?si=dUi15q68Qre0B9KegBl3-A \
https://open.spotify.com/intl-fr/album/70GAqt2avSiKBJ2IEymou1?si=H6FT_ganSTOAcU7gFH5BJg \
https://open.spotify.com/intl-fr/album/03GeIP6sDuMEQydiQgwJ9M?si=9vkA4e3OR5yFY7wYWNMm7g \
https://open.spotify.com/intl-fr/album/25JdFEbKXocMQyJdlBzD5d?si=EVX-8egUQveDfUrkAXltcw \
https://open.spotify.com/intl-fr/album/6GDFV4kWsQDYuah6tSqmu2?si=5nkbhDetT9WXa5DTv1Gy0A \
https://open.spotify.com/intl-fr/album/7D7V6M05UIOTjLdqbwRX0w?si=RQdPbIu3Rp2hxtfG8LPItQ \
https://open.spotify.com/intl-fr/album/5dxqD5Kc6cRRi3rErmDfXG?si=64zx8VFRTvGBfv4jd7s2xQ \
https://open.spotify.com/intl-fr/album/4J79cxsmRqZbI0BKmNFDy2?si=n7BguyILRYGVU1jmMdeQUw \
https://open.spotify.com/intl-fr/album/5l5m1hnH4punS1GQXgEi3T?si=4n_6HE61QEiQ5DYwFIBINQ \
https://open.spotify.com/intl-fr/album/7acEciVtnuTzmwKptkjth5?si=GqHFNXaJQJinVyTqTxLKdQ \
https://open.spotify.com/intl-fr/album/1fvWYcbjuycyHpzNPH1Vfk?si=nopy4SXuSp-b_qFJty4wAg \
https://open.spotify.com/intl-fr/album/0qWyN9Kpv8oCmCkDRYkvYH?si=XaPjKOC7TYStOzxqTvYIDA \
https://open.spotify.com/intl-fr/album/1v1hdLXVBjFel9srMX8paD?si=zZRtAyqcQGKU4yHqM_dmyQ \
https://open.spotify.com/intl-fr/album/3MAeL6Tz4tLhgtdGunyfjQ?si=CHAxzp2ASEeY-cjGi7xCMQ \
https://open.spotify.com/album/5k9w7NXES6AJYYddjDVBsR?si=df7erOCRRK6MT24GLBD_jw \
https://open.spotify.com/intl-fr/album/5lOFvOWAdy9G6p44noRILU?si=nb6wLJ_wSDGXJ7LjPC3fBQ \

Desktop:
I'm using Linux Mint 22.1 with Cinnamon, and Python 3.12.3. I installed the package with pipx. My PC has an Intel Core i7-9750H (6 cores/12 threads).