MonoSlicer

A monophonic sample slicer and sampler instrument built with JUCE and CMake.

Load an audio file, slice it into regions (automatically via onset detection or manually), and trigger individual slices via MIDI.

Features

• Slice & trigger -- Load WAV, AIFF, FLAC, or OGG files and play slices chromatically via MIDI (starting at C3)
• Auto-slice -- Onset-based detection with adjustable sensitivity
• Manual slice control -- Click to add, right-click to remove, drag to reposition slice markers
• Per-voice envelopes -- Amplitude and filter ADSR envelopes with configurable depth
• Filter -- 5-mode biquad filter (LP12, LP24, HP, Bandpass, Notch) with cutoff, resonance, and envelope depth
• Tone shaping -- Bass and treble controls
• Pitch shift -- Key transpose from -12 to +12 semitones
• Time stretch -- Resample to a target beat count at a given BPM
• Undo/redo for slice operations
• Zoomable waveform display with piano key sidebar and time ruler
• Full DAW state recall -- All parameters and slices are saved with your session
• UI scaling from 50% to 200%

Building

Requires CMake 3.22+ and a C++17 compiler.

make fetch      # Clone JUCE 8.0.9
make configure  # CMake configure
make build      # Build (Release)

Installing

make install

Copies AU and VST3 to the system plugin directories and triggers an Audio Unit rescan.

Clean

make clean

Plugin Formats

• Audio Unit (AU)
• VST3
• Standalone

Usage

1. Load an audio file via the Load button, drag-and-drop, or the < / > buttons to browse the current folder
2. Click Auto Slice or manually click on the waveform to place slice markers
3. Play slices via MIDI -- note C3 triggers slice 0, C#3 triggers slice 1, and so on
4. Shape the sound with the amp/filter envelopes, filter, and tone controls

Waveform Interaction

Action	Effect
Left-click on waveform	Add slice marker
Drag slice marker	Reposition
Right-click on waveform	Remove nearest slice
Click piano key	Trigger corresponding slice
Mouse wheel	Zoom / scroll