Set new tempo as a multiple of current tempo

use_bpm_mul  mul (number)

Sets the tempo in bpm (beats per minute) as a multiplication of the current tempo. Affects all containing calls to sleep and all temporal synth arguments which will be scaled to match the new bpm. See also use_bpm

Introduced in v2.3

Example

# Example 1 

use_bpm 60  
  play 50
  sleep 1     
  play 62
  sleep 2     
  use_bpm_mul 0.5
  play 50
  sleep 1          
  play 62





# Set the BPM to 60
 
# Sleeps for 1 seconds
 
# Sleeps for 2 seconds
# BPM is now (60 * 0.5) == 30
 
# Sleeps for 2 seconds