Dynamic Range (4)

The Music Telegraph | Text 2019/01/22 [13:22]

Dynamic Range (4)

The Music Telegraph| 입력 : 2019/01/22 [13:22]

▲ ADSR (Internal Dynamic)

© Routenote




 

Dynamic Range (4)

 

 

 

2. Internal dynamic

- a.k.a. ‘Signal Envelope’

- a.k.a. ‘ADSR’ (Attack - Decay - Sustain - Release)

- A plot of audio signal's amplitude/energy changes from start to finish

- Every type of signal has a shape  

 

▲ ADSR of Snare drum

© The Music Telegraph



▲ © The Music Telegraph



 

 

▲ ADSR of violin

© The Music Telegraph

 

A= Attack

- Initial energy rise

- a.k.a. Peak, Transient (lasting for but a short time), Transient peak

- The faster rise, the sharper the sound 

 

 

D = Decay

- Drop of peak energy

 

 

S = Sustain

- ‘Resonance of sound’

- a.k.a. ‘Average body of sound’

- Most important part of sound

 

 

R = Release

- Decay of sustain energy

 

 

 

 

▲ P/A ratio

© The Music Telegraph


*In general, the higher the P/A ratio, the more percussive the sound

e.g. Snare drum > Violin (in P/A ratio)

 

 

 

 

Perception

 

A, D

1. Identifies the sound

2. Define the overall character (sharp/soft)

3. Clarity (in your face) 

 

 

S, R

1. Sense of pitch

2. Tonality (tonal quality)

3. Loudness, phatt

 

 

 

[side trip]

ex) When band-mix, bass sounds become more softer. Why?

 

▲ Bass guitar's P/A ratio change after band-mix:

When bass sounds are mixed with band instruments, P/A ratio decreases

(*In case of electric guitar, guitar sounds become thinner after band-mix)

© The Music Telegraph





 

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