Creating a Vibrato-Rise Patch Using BEAP (MAX)

This article will provide a step-by-step tutorial to create a vibrato-rise patch using BEAP. This means that this is not going to be a standard vibrato patch. The rise in pitch will lead to a faster vibrato.  

What Is Vibrato?

Vibrato is a rapid but slight variation in pitch while holding a not-for-longer duration. It can be produced using an instrument, voice, or both.   Here is a step-by-step tutorial on how to create a Vibrato rise patch using BEAP:

STEP 1: Pull out the following modules from BEAP and alter their settings as shown.

There will be a small 'b' symbol on the left side of the screen, which you can click to search for the following modules:  

• Oscillator
    
• Choose the 'sine' wave.
• Set CV2 to 10.2 %
• Offset to 9.47 %
• Keyboard
  
  No change in settings.  

• ADSR
    
• Attacks: 50 ms
• Decay: 50ms
• Sustain: 70%
• Release: 500ms
• VCA (Voltage Controlled Amplifier)
  
  No change in settings.  

• Stereo
  
  No change in settings.  

• CV LFO (Low Frequency Oscillator)
  
• Phase: 0.00
• Rate: 6.44Hz
• CV Amount: 100 %

Importance of the 'CV LFO'

As the name suggests, this is a low-frequency oscillator with a CV input. This provides the vibrato to the sound by going into the CV2 input of the Oscillator. The 1v/oct output of the keyboard goes into the CV input of the LFO, hence controlling the intensity of vibrato via the pitch change.    

STEP 2: Patch all the modules according to the following instructions, referring to the picture below 

• Put the 1v/oct out of the keyboard into the CV1 input of the Oscillator.
• Put the 1v/oct out of the keyboard into the CV input of the CV LFO.
• The gate out of the keyboard goes into the ADSR Gate.
• The signal out of the CV LFO goes into the CV2 input of the Oscillator.
• The oscillator signal goes into the signal in of VCA.
• The signal out of ADSR goes into CV in of VCA.
• The VCA output goes into the stereo's left and right inputs.

The patch is ready; as soon as you press the keys on the keyboard, the vibrato starts; the higher the pitch, the more intense the vibrato becomes.