Metal Cassette
Bloodgod - Schricklik Tempeest
Enzugiri - Folsom Prison Blues
Enzugiri - Sam Hall
Bloodgod - Catharsis

Blues Cassette
Bluesraiders - St James Infirmary Blues
The Tall Pines - Fire In My Bones
Reverend Peytons Big Damn Band - Devils Look Like Angels live on WFMU
Brother Timothy Clark - Are You Ready?

All of the above were downloaded from https://freemusicarchive.org/

Classical Cassette 
Wagner - Ride of the Valkyries
Beethoven - Moonlight Sonata

Youtube Audio Library

Slavic Orchestral Cassette
Armesto - Cheeki Breeki Bandit Radio (orchestral cover) https://www.youtube.com/watch?v=TAm29XMYL2o
From Russia With Love - Youtube Audio Library

Slavic Hard Bass Cassette
Relis YT - Non-Copyright Russian SLAV Hard Bass  https://www.youtube.com/watch?v=ok6v4Gg1Dz0
MCBenPro - Agon https://www.youtube.com/watch?v=4mMEgqUniLk
Prod Leo - Russian Hard Bass Type Beat "Slav" https://www.youtube.com/watch?v=KyZDkrlynPE
Antonin Chachkine - Slav https://www.youtube.com/watch?v=2C6EBFJTfMc

Russia - Russian National Anthem