iceGear Instruments

Laplace - Resonator Synthesizer

Basic Operation

How to change which octaves are shown.

Rotary Knob mode

You can change the operation method of the rotary knob on the setting screen.

Finer Resolution for Dragging

How to reset the parameter to the default value.

Sound Preset

Preset Browser

  1. Tap ALT button
  2. Select the preset or folder you want to export
  3. Tap Share button
  4. You can export the presets to Mail, iCloud, etc. via Share Extension
  • You can import presets via Mail, iCloud Drive and other applications that support Share Extension.

Programs Folder

In the "Programs" folder you can define which presets will be loaded when a MIDI program change message is received. The program number corresponds to the order of the sound preset in the "Program" folder.

The presets saved in this folder are also displayed in the preset list of the AUv3 host.

About the presets made with version 1

When you launch version 2 of the APP for the first time, a folder named "(Old Version Presets)" is created in the "User" folder, and the preset made with the old version is copied into this folder. This process will not be executed even if you launch it as AUv3 plugin.

If the old version preset does not appear in the "User" folder, please try the following.

Back up old version preset file to Mac/PC

About File Sharing on iPhone, iPad, and iPod touch (

  1. In iTunes, select App from the list in the "File Sharing" section.
  2. If you drag files from the Documents list and drop them onto folders or windows on your computer, they are copied to your computer.

Restore the old version preset files saved on the device

  1. Restart the device (
  2. Open iOS Settings App from iOS Home screen
  3. Scroll down and display Laplace settings
  4. Turn on the "Convert" switch
  5. Close the setting application
  6. Launch Laplace of App version (Not AUv3)
  7. If the Laplace App succeeds in converting the old version data, a folder named "(Old Version Presets)" will be created in the "User" folder of the sound preset, and there should be presets converted in that folder.

Basic control panel

The settings of the Basic control panel are saved in the sound preset.

  • Volume
  • Arpeggiator ON/OFF
  • Monophonic ON:Mono/OFF:Poly

    limits playback to one note at a time.

  • Keyboard Hold ON/OFF
  • Glide

    adds a sliding pitch transition between notes that are played consecutively.

  • Pitchbend Range

    Specifies the Pitch Bend Range in semitones.

  • Octave

    can transpose pitch up or down in one-octave steps.

Global Settings

  • All Note Off

    When notes get stuck, you can kill all notes currently playing by tapping this button.

  • Master Volume

    This setting is not affected by changing the sound preset.

  • Master Transpose

    This setting is not affected by changing the sound preset.

  • Master Tune

    This setting is not affected by changing the sound preset.

  • Maximum Polyphony

    Lower maximum polyphony setting will reduce the CPU usage.

  • Sync Method

    You can set the synchronization method of the arpeggiator.

  • Tempo

    When the synchronization method is internal sync or Ableton Link, you can change the tempo of the arpeggiator.

  • MIDI Input Channel

    When the OMNI is OFF this app will receive only on the currently selected channel.

  • MIDI Input Ports

    You can set which MIDI input port to receive.

  • MIDI Mapping

    You can save MIDI mapping settings.

  • Audio Quality

    Eco setting will reduce the CPU usage.

  • Audio Buffer Size

    The audio buffer size affects the amount of latency and the CPU usage. Higher setting will reduce clicking noise at high CPU usage, but also cause more latency.

  • Background Audio

    If background audio is enabled, this app will consume battery power significantly even if other apps are running or if your screen is turned off.

  • Load the arpeggiator settings along with the sound preset

    If this switch is on, when loading a sound preset, not only the timbre but also the arpeggiator settings are loaded.

  • Load the MIDI mapping along with the sound preset

    If this switch is on, when loading a sound preset, not only the timbre but also the MIDI mapping settings are loaded.

  • Knob Mode
  • Keyboard Size
  • About


Program Mode

The program row can be used when the style is set to "Program". It specifies which of the held notes on the keyboard will be played.

Example: When you hold down C3,E3,G3,A3,C4 keys, C3 is 1st note, E3 is 2nd note, G3 is 3rd note. A3 is 4th note. C4 is 5th note.

MIDI Mapping

You can assign the MIDI controller knobs to the parameters.

MIDI Learn

  1. Enter MIDI Learn Mode by tapping the MIDI Learn button.

  2. Touch the on-screen control you wish to map.
  3. Adjust the slider or knob on your MIDI controller. (MIDI CC)
  4. Repeat above steps as required.

Settings Panel

By holding down the control you can open the settings panel.

To delete the assigned MIDI mapping, tap the control several times.

Saving MIDI Mapping

You can save the created MIDI mapping from the setting screen.

Synthesizer Parameters



The Click section makes percussive impulses.


  • Pitch : Adjusts the pitch of the click.
  • Stiffness : Adjusts the hardness of the click. This parameter can also be modulated by pitch and velocity.
    • Velocity
    • Key
  • Color : Adjusts the tone color of the click.
  • Envelope
    • Decay
    • Damper Noise Level

The Noise section makes bowing noise and blowing noise.


  • LPF (Low Pass Filter)
    • Frequency (Cutoff Frequency): Adjusts the cutoff frequency of the filter.
      • ENV: Adjusts the depth of modulation applied by the ENV.
      • Velocity: Adjusts the depth of modulation applied by the velocity.
      • KEY (Keyboard Tracking): Adjusts the depth of modulation applied by the keyboard.
    • Resonance: Emphasizes the cutoff frequency.
  • HPF (High Pass Filter)
    • Frequency (Cutoff Frequency): Adjusts the cutoff frequency of the filter.
  • Envelope
    • Attack
    • Decay
    • Sustain
    • Release
  • AMP
    • Gate/ENV
      • ENV
      • Gate: Keyboard Gate

Mix: Adjusts the amplitude of click/noise sent to the resonator.


The Resonator section makes pitch and resonance



  • Resonator
    • Flavor: Adjusts the pitch of the APF resonance.
      • Strength: Adjusts the amplitude of the APF signal.
      • Color: Adjusts the APF resonance pitch.
    • LPF (Low Pass Filter)
      • Frequency
        • Velocity
    • ENV
      • Decay: Adjusts decay time.
      • Damper: Adjusts amount of damping at key-up.
    • Pitch ENV: Envelope for the resonator's pitch
      • Depth
        • Velocity
      • Attack
      • Decay
  • Sine (Sine oscillator)
    • Pitch
      • Coarse
      • Fine
    • FM
      • Depth
      • Ratio
    • ENV
      • Release
  • Mix: Adjusts the mix of resonator and sine signal.
  • HPF (High Pass Filter)
  • Dry/Wet: Adjusts the mix of dry and wet signal.


  • Mix
  • Time
  • Feedback
  • Rate
  • Depth
  • Spread

  • Mix
  • Time
    • Range
    • L
    • Time
    • R
    • Modulation
      • Rate
      • Depth
  • Feedback
    • Feedback
    • Cross
  • Hi-Damp
  • Filter
    • Frequency
    • Modulation
      • Rate
      • Depth
    • Resonance
    • Drive
  • Mix
  • PreDelay
  • Time
  • Hi-Damp