Impressive YM2413/OPLL (SMS/MK3, ARC, MSX) Music

While the chip doesn't normally have stereo support, some YT uploads are in stereo (probably via emulation; some vgm player plugins will automatically pan the channels) and some of the audio expansion packs for the MSX provide a kind of stereo effect by playing each chip through only one speaker.
The SMS's PSG and FM chips were only ever combined in the Mark III BIOS screen (Space Harrier theme). I'm not sure why.
Youtube Playlist (combined)
SMS & ARC:
Ys: The Vanished Omen (SMS FM)
Solomon's Key, Alternate
Mark III BIOS (PSG+FM, Space Harrier theme)
Space Harrier 3D (SMS FM)
Rambo III (SMS FM)
Phantasy Star (SMS FM)
Golvellius: Valley of Doom (SMS FM)
Miracle Warriors (SMS FM)
R-Type (SMS FM)
Outrun 3D (SMS FM)
Wonder Boy III: The Dragon's Trap (SMS FM)
Galaxy Force (SMS FM)
Cyborg Hunter/Borgman (SMS FM)
Pang Pom's (ARC, w/ OKI6295)
Maze Hunter 3D (SMS FM)
Thunder Blade (SMS FM)
Wonder Boy in Monster Land (SMS FM)
Power Strike/Aleste (SMS FM)
Global Defense
After Burner (SMS FM)
Dynamite Dux (SMS FM)
Double Dragon (SMS FM)
Sky Soldiers (ARC)
Gang Wars (ARC)
Rampage (SMS FM)(in-game)
Quiz Tonosama no Yabou (ARC)
Alex Kidd: The Lost Stars (SMS FM)
Spellcaster/Kujaku Ou (SMS FM)
Vigilante (SMS FM)
Super Pang/Buster Bros (ARC)
Fantasy Zone II (SMS FM), Pang/Pomping World (ARC)(added reverb & minor stereo), Zillion II (SMS FM), Lord of the Sword (SMS FM), Kenseiden (SMS FM), Alien Syndrome (SMS FM), Rampart (ARC, w/ Oki6295), Time Soldiers (SMS FM), SDI: Strategic Defense Initiative (SMS FM), Alex Kidd: BMX Trial (SMS FM),
Hoshi o Sagashite... (SMS FM), Scramble Spirits (SMS FM), Hatena? no Daibouken: Adventure Quiz 2 (ARC, YM2413), Galactic Protector (SMS FM), Captain Silver (SMS FM), Blade Eagle 3D (SMS FM), Megumi Rescue (SMS FM), Outrun (SMS FM), California Games (SMS FM), Poseidon Wars 3D (SMS FM), Fantasy Zone: The Maze (SMS FM), Shinobi (SMS FM), Altered Beast (SMS FM), Shanghai (SMS FM), Penguin Land (SMS FM), Zaxxon 3D (SMS FM), Aztec Adventure (SMS FM), Cloud Master (SMS FM), Bomber Raid (SMS FM), Summer Games (SMS FM), Rastan Saga (SMS FM),
MSX/MSX2:
Illusion City (w/ AY-3-8910)
Sorcerian (w/ FM-Pac)
Xak: The Art of VS, Xak II (w/ AY-3-8910)
Final Fantasy (w/ AY-3-8910)
Xak: The Tower of Gazzel (MSX FM w/ AY-3-8910)
Fire Hawk: Thexder tSC (w/ AY-3-8910)
Pumpkin Adventure III (Unreleased)
GD: Greatest Driver
Undead Line
Shin Maou Golvellius
Daisenryaku II: Campaign Version (MSX, FM-Pac w/ AY-3-8910)
Panasonic FM-Pac Firmware (MSX)(Ashguine 2 songs)
Dragon Slayer: TLoH/DS6 (MSX, w/ AY-3-8910)
Princess Maker (MSX FM w/ AY-3-8910)
Super Cooks (MSX)
D.A.S.S. (MSX, w/ AY-3-8910)
Sonyc (MSX)(Pirate)
Laydock 2 (MSX)
Fray In Magical Adventure (w/ FM-Pac)
Madou Monogatari 1-2-3 (MSX)
Aleste 2 (MSX), Starship Rendezvous (w/ AY-3-8910), Aleste (MSX FM), Gaudi: Barcelona no Kaze (w/ AY-3-8910), Playball III (MSX FM), Xevious (MSX), Columns (MSX), F1 Douchuuki (MSX FM), Feedback (MSX FM), F-1 Spirit 3D Special, Aleste, Psychic World/Psycho World, Hydefos (MSX FM w/ AY-3-8910), Valis 2 (MSX FM), Tetris (BPS, w/ AY-3-8910), Puyo Puyo (MSX FM), Nobunaga no Yabou: Bushou Fuuunroku/Nobunaga's Ambition: Lord of Darkness (MSX FM), Nobunaga no Yabou: Sengoku Gunyuuden/Nobunaga's Ambition II (MSX FM), FM Pana Amusement Cartridge, Disc Station, Pro Yakyuu Family Stadium: PR, Pro Yakyuu Family Stadium: Homerun Contest (MSX FM), Namco Community Disk Magazine 1-2,
Check: Bombaman - The Boggy Marches? - not online?
Homebrew tracks:
Life on Earth (MSX2, MSX-Music/Y8950 w/ FM-Pac)
Lagrange Point (TNS-HFC3 & TNS-HFX4 cartridges for NES/Famicom)
Naruto - Space Walk
Sonic the Hedgehog (SMS Romhack)
Ashguine 2/Ashguine Story II (MSX FM+MSX-Music/Y8950 patch, 2015?)
The SMS's PSG and FM chips were only ever combined in the Mark III BIOS screen (Space Harrier theme). I'm not sure why.
Youtube Playlist (combined)
SMS & ARC:
Ys: The Vanished Omen (SMS FM)
Solomon's Key, Alternate
Mark III BIOS (PSG+FM, Space Harrier theme)
Space Harrier 3D (SMS FM)
Rambo III (SMS FM)
Phantasy Star (SMS FM)
Golvellius: Valley of Doom (SMS FM)
Miracle Warriors (SMS FM)
R-Type (SMS FM)
Outrun 3D (SMS FM)
Wonder Boy III: The Dragon's Trap (SMS FM)
Galaxy Force (SMS FM)
Cyborg Hunter/Borgman (SMS FM)
Pang Pom's (ARC, w/ OKI6295)
Maze Hunter 3D (SMS FM)
Thunder Blade (SMS FM)
Wonder Boy in Monster Land (SMS FM)
Power Strike/Aleste (SMS FM)
Global Defense
After Burner (SMS FM)
Dynamite Dux (SMS FM)
Double Dragon (SMS FM)
Sky Soldiers (ARC)
Gang Wars (ARC)
Rampage (SMS FM)(in-game)
Quiz Tonosama no Yabou (ARC)
Alex Kidd: The Lost Stars (SMS FM)
Spellcaster/Kujaku Ou (SMS FM)
Vigilante (SMS FM)
Super Pang/Buster Bros (ARC)
Fantasy Zone II (SMS FM), Pang/Pomping World (ARC)(added reverb & minor stereo), Zillion II (SMS FM), Lord of the Sword (SMS FM), Kenseiden (SMS FM), Alien Syndrome (SMS FM), Rampart (ARC, w/ Oki6295), Time Soldiers (SMS FM), SDI: Strategic Defense Initiative (SMS FM), Alex Kidd: BMX Trial (SMS FM),
Hoshi o Sagashite... (SMS FM), Scramble Spirits (SMS FM), Hatena? no Daibouken: Adventure Quiz 2 (ARC, YM2413), Galactic Protector (SMS FM), Captain Silver (SMS FM), Blade Eagle 3D (SMS FM), Megumi Rescue (SMS FM), Outrun (SMS FM), California Games (SMS FM), Poseidon Wars 3D (SMS FM), Fantasy Zone: The Maze (SMS FM), Shinobi (SMS FM), Altered Beast (SMS FM), Shanghai (SMS FM), Penguin Land (SMS FM), Zaxxon 3D (SMS FM), Aztec Adventure (SMS FM), Cloud Master (SMS FM), Bomber Raid (SMS FM), Summer Games (SMS FM), Rastan Saga (SMS FM),
MSX/MSX2:
Illusion City (w/ AY-3-8910)
Sorcerian (w/ FM-Pac)
Xak: The Art of VS, Xak II (w/ AY-3-8910)
Final Fantasy (w/ AY-3-8910)
Xak: The Tower of Gazzel (MSX FM w/ AY-3-8910)
Fire Hawk: Thexder tSC (w/ AY-3-8910)
Pumpkin Adventure III (Unreleased)
GD: Greatest Driver
Undead Line
Shin Maou Golvellius
Daisenryaku II: Campaign Version (MSX, FM-Pac w/ AY-3-8910)
Panasonic FM-Pac Firmware (MSX)(Ashguine 2 songs)
Dragon Slayer: TLoH/DS6 (MSX, w/ AY-3-8910)
Princess Maker (MSX FM w/ AY-3-8910)
Super Cooks (MSX)
D.A.S.S. (MSX, w/ AY-3-8910)
Sonyc (MSX)(Pirate)
Laydock 2 (MSX)
Fray In Magical Adventure (w/ FM-Pac)
Madou Monogatari 1-2-3 (MSX)
Aleste 2 (MSX), Starship Rendezvous (w/ AY-3-8910), Aleste (MSX FM), Gaudi: Barcelona no Kaze (w/ AY-3-8910), Playball III (MSX FM), Xevious (MSX), Columns (MSX), F1 Douchuuki (MSX FM), Feedback (MSX FM), F-1 Spirit 3D Special, Aleste, Psychic World/Psycho World, Hydefos (MSX FM w/ AY-3-8910), Valis 2 (MSX FM), Tetris (BPS, w/ AY-3-8910), Puyo Puyo (MSX FM), Nobunaga no Yabou: Bushou Fuuunroku/Nobunaga's Ambition: Lord of Darkness (MSX FM), Nobunaga no Yabou: Sengoku Gunyuuden/Nobunaga's Ambition II (MSX FM), FM Pana Amusement Cartridge, Disc Station, Pro Yakyuu Family Stadium: PR, Pro Yakyuu Family Stadium: Homerun Contest (MSX FM), Namco Community Disk Magazine 1-2,
Check: Bombaman - The Boggy Marches? - not online?
Homebrew tracks:
Life on Earth (MSX2, MSX-Music/Y8950 w/ FM-Pac)
Lagrange Point (TNS-HFC3 & TNS-HFX4 cartridges for NES/Famicom)
Naruto - Space Walk
Sonic the Hedgehog (SMS Romhack)
Ashguine 2/Ashguine Story II (MSX FM+MSX-Music/Y8950 patch, 2015?)