Apex
Title	Sound	Spectrum	Text
Normal S1
S4
S3
Quadruple Rhythm
Midsystolic Click
Opening Snap
Late Systolic Murmur
Late Systolic Murmur

LLSB
Title	Sound	Spectrum	Text
Normal S1
Split S1
S4
S3
Early Systolic Murmur
Pericardial Friction Rub

Base Left
Title	Sound	Spectrum	Text
Normal S2
Normal split S2
Normal split S2
Paradoxical split S2
Widely split S2
Fixed split S2
Continuous Murmur
Continuous Murmur

Base Right
Title	Sound	Spectrum	Text
Normal S2
Ejection sound
Midsystolic Murmur