Envelope generally refers to the method of controlling the size of a certain parameter in a function-like manner (editing the curve yourself) during music playback

FX parameter envelope is played Automatically control the size of certain FX parameters

Velocity envelope and volume Paul also uses predetermined curves to control the volume and speed during playback

Dry and wet ratio:

Dry sound is the sound that has not passed through the effector

Wet sound is the sound that has been processed by the effector

The dry-wet ratio is to control the amplitude ratio of dry sound and wet sound.

FX: Effector

EQ: A kind of effector, it feels like it controls the amplitude of different frequencies

Pan/sound image: left and right channels Amplitude ratio

M/S: It feels a bit like Mute/Solo

Mute means the track is muted

Solo means the track is solo

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If you want to learn Midi basics

I think if you just want to read music, you should use Guitar Pro

If you want a real Midi editor, I recommend FL Studio (strongly recommended!!)