I had sampled Doepfer A110 and make xrni files.
Sine & Triangle have electro noise it from electronic circuit.
I recommends using LPF.
Zip file includes:
Saw wave
Sine wave
Square wave(50% PWM)
Square wave(60% PWM)
Square wave(70% PWM)
Square wave(80% PWM)
Square wave(90% PWM)
Square wave(95% PWM)
Triangle wave
Link:
have fun