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Forum: General Discussion

Tópico: Custom script for smart bpm matching
Smart Ratio Sync / On-Load BPM Normalizer for 1:1, 4:3, 2:1


AI generated, except this bit. 
This is for open format mixing mainly. 
I made this script because I want a quick beat ratio sync like from 90 to 130. In this specific case I should calculate 3:4 ratio and eventually land on 120 then adjust it. ANGTFD!
Coupled with pitch lock, I feel I can mix anything now.

It introduced 700ms debounce, possibly unreliable in some use cases. 
Other ratios can be introduced if needed but I see it as enough for most use cases.

Designed for two-deck use.
Does not call normal sync.
It only adjusts BPM/pitch on load.


What it does:
When a track loads, it compares the loaded deck BPM with the other deck BPM and moves the loaded track to the closest useful rhythmic ratio:
- 1:1 for close BPMs
- 4:3 for medium BPM jumps
- 2:1 for near double-time cases

Examples:

Deck 1 = 90, load deck 2 = 130
ratio = 130 / 90 = 1.444
target = 90 × 4/3 = 120

Deck 1 = 100, load deck 2 = 105
ratio = 105 / 100 = 1.05
target = 100

Deck 1 = 90, load deck 2 = 170
ratio = 170 / 90 = 1.888
target = 180


Why:
VirtualDJ normal sync sometimes chooses double-time, e.g. 90 → 180, when a musical intermediate ratio like 4:3 would be more useful.

Mapper location:
ONSONGLOAD

Script:

param_equal `get_deck` 1 ?
  wait 700ms &
  deck 1 loaded ?
    deck 2 loaded ?
      deck 1 get_bpm & param_bigger `deck 2 get_bpm` ?
        deck 1 get_bpm & param_bigger `deck 2 get_bpm & param_multiply 1.666667` ?
          deck 2 get_bpm & param_multiply 2 & param_cast 'beats' & deck 1 pitch
        :
          deck 1 get_bpm & param_bigger `deck 2 get_bpm & param_multiply 1.166667` ?
            deck 2 get_bpm & param_multiply 1.333333 & param_cast 'beats' & deck 1 pitch
          :
            deck 2 get_bpm & param_cast 'beats' & deck 1 pitch
      :
        deck 2 get_bpm & param_bigger `deck 1 get_bpm & param_multiply 1.666667` ?
          deck 2 get_bpm & param_multiply 0.5 & param_cast 'beats' & deck 1 pitch
        :
          deck 2 get_bpm & param_bigger `deck 1 get_bpm & param_multiply 1.166667` ?
            deck 2 get_bpm & param_multiply 0.75 & param_cast 'beats' & deck 1 pitch
          :
            deck 2 get_bpm & param_cast 'beats' & deck 1 pitch
    :
      nothing
  :
    nothing
:
  param_equal `get_deck` 2 ?
    wait 700ms &
    deck 2 loaded ?
      deck 1 loaded ?
        deck 2 get_bpm & param_bigger `deck 1 get_bpm` ?
          deck 2 get_bpm & param_bigger `deck 1 get_bpm & param_multiply 1.666667` ?
            deck 1 get_bpm & param_multiply 2 & param_cast 'beats' & deck 2 pitch
          :
            deck 2 get_bpm & param_bigger `deck 1 get_bpm & param_multiply 1.166667` ?
              deck 1 get_bpm & param_multiply 1.333333 & param_cast 'beats' & deck 2 pitch
            :
              deck 1 get_bpm & param_cast 'beats' & deck 2 pitch
        :
          deck 1 get_bpm & param_bigger `deck 2 get_bpm & param_multiply 1.666667` ?
            deck 1 get_bpm & param_multiply 0.5 & param_cast 'beats' & deck 2 pitch
          :
            deck 1 get_bpm & param_bigger `deck 2 get_bpm & param_multiply 1.166667` ?
              deck 1 get_bpm & param_multiply 0.75 & param_cast 'beats' & deck 2 pitch
            :
              deck 1 get_bpm & param_cast 'beats' & deck 2 pitch
      :
        nothing
    :
      nothing
  :
    nothing
 
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