PadSynth

Description

The PadSynth uses a special variant of additive synthesis to produce sound. The algorithm used was created by Paul Nasca and is described here. It can create a variety of sounds but does well for new-age pads, bells and choirs washes. Harmonics are drawn in two tables which are then blended and played back to give the PadSynth its sound. The PadSynth tutorial video shows how to use this machine. 
 

UI Reference

Note: By pressing one of the harmonics buttons (7, 8) you can access the harmonics editors, where you can set volumes for each harmonic by touching inside the bar area as well as the high frequency smearing or "width" parameter (rightmost, yellow bar)

 

  1. Machine label: This is used to identify this machine in various places throughout the app. Its value can be changed via a long-press action (label changes color to indicate a successful touch). Upon successful long-press, a keyboard offering you to rename the machine will appear. Use this to identify a machine in a rack configuration where there might be more than one instance of the same machine.

  2. Note On LED: This LED lights up whenever a note is triggered.

  3. Preset LCD: This display shows the name of the last loaded preset and is used to load presets. A preset is a saved file that contains the positions of all knobs as well as samples used. To load a preset, touch the preset LCD. This will bring up a list of saved presets to choose from. To scroll between presets in a directory, swipe left or right on the preset LCD.

  4. Save Preset button: This button allows you to save your own presets to disk for use later. Pressing this button will bring up a keyboard allowing you to name your preset. Presets are stored on the external storage in /caustic/presets/padsynth.

  5. Copy button: Pressing this button while in Harmonic table view (7 or 8) will copy the content of the other harmonic table into the current one.

  6. Swap button: Pressing this button will replace harmonic table 1's values with the values from table 2 and replace harmonic table 2's values with the values from table 1.

  7. Harmonic Table 1 button: When pressed, the central view will switch to show Harmonic table 1's harmonic levels for editing. Each vertical bar represents a harmonic and the vertical value for each bar represents the volume of that harmonic in the output sound. The right-most (yellow) bar controls the amount of high-frequency smearing or "width" applied to the harmonics.

  8. Harmonic Table 2 button: When pressed, the central view will switch to show Harmonic table 2's harmonic levels for editing. Each vertical bar represents a harmonic and the vertical value for each bar represents the volume of that harmonic in the output sound. The right-most (yellow) bar controls the amount of high-frequency smearing or "width" applied to the harmonics. 

  9. Control button: When pressed, the central view will switch to show the control knobs for shaping the PadSynth's sound (controls 12-31).
  10. Output Volume knob: The final output volume of the PCMSynth.
  11. Output VU meter: Indicated the level at which the PCMSynth is outputing signal. If this reaches RED, then the PCMSynth will output distorted sound.
  12. LFO1 Target selector: Sets which PadSynth configuration value is modified by LFO1.
  13. LFO1 Rate knob The speed at which the LFO1 modifies its target value.
  14. LFO1 Depth knob: The amount of modification LFO1 applies to its target value.
  15. LFO1 Phase knob: LFO1 is time-sync'ed to the beat. The phase knob controls the relationship between the LFO sweep value and the beat time.
  16. LFO2 Target selector: Sets which PadSynth configuration value is modified by LFO2.
  17. LFO2 Rate knob The speed at which the LFO2 modifies its target value.
  18. LFO2 Depth knob: The amount of modification LFO2 applies to its target value.
  19. LFO2 Phase knob: LFO2 is time-sync'ed to the beat. The phase knob controls the relationship between the LFO sweep value and the beat time.
  20. Morph knob: Controls the mix between the two harmonics tables. If the morph envelope is used, this knob defines the maximum value the envelope will reach.
  21. Morph Envelope button: Used to toggle the use of the morph envelope.

  22. Morph Envelope Attack knob: The amount of time before morph reaches the value defined by the morph knob, stating at 0

  23. Morph Envelope Decay knob: The amount of time, after the attack period, for the morph valueto go from the main knob value to the sustain level.

  24. Morph Envelope Sustain knob: The value for morph at which to settle, once the attack and decay period have elapsed and the note is held, relative to the morph knob.

  25. Morph Envelope Release knob: The amount of time for the morph value to go from the sustain level down to 0.

  26. Table 1 Gain knob: Sets the relative volume of harmonics table 1's output
  27. Table 2 Gain knob: Sets the relative volume of harmonics table 2's output

  28. Volume Envelope Attack knob: The amount of time before volume reaches 100%, stating at 0

  29. Volume Envelope Decay knob: The amount of time, after the attack period, for the volume to go from 100% to the sustain level.

  30. Volume Envelope Sustain knob: The volume at which to settle, once the attack and decay period have elapsed and the note is held.

  31. Volume Envelope Release knob: The amount of time for the volume to go from the sustain level down to 0.

  32. Mute/Solo buttons: These buttons link to the ones in the mixer and are used to cut out this machine from the final mix or listen to only this machine.

  33. Preview Keyboard: This keyboard is used to play notes to help when designing sounds with the PCMSynth.

  34. Octave buttons: Raises or lowers the octave of the Preview Keyboard.