Sample Trigger Player Guide

A tool for loading, marking, and triggering audio samples in real-time.

Getting Started

• Click "Load Sample" to import a local audio file
• Click "Browse Samples" to load remote samples
• Press "Play" to start playback
• Use the "Mark" button or spacebar to set trigger points
• Click trigger pads or use the number keys 1-4 to play from marked points
• Use the START pad or press 0 to retrigger from the beginning

Keyboard Shortcuts

• Space Mark current position
• 0 Retrigger from beginning (START pad)
• 1 - 4 Trigger respective sample points
• Q W E R A S D F Trigger Dub Effects

Visual Indicators

• Orange playhead shows current position
• Red markers show trigger points on the waveform
• Green shaded area shows played portion
• Red lit pads indicate marked positions with timestamps
• VU Meters display real-time stereo audio levels (L/R channels)
• Countdown timer shows remaining playback time

Selection Tool

• Hover over the waveform to see the selection hint
• Click and drag on the waveform to select a region
• Drag the left/right handles to adjust selection boundaries
• Click "Play Selection" button to play only the selected portion
• Click "Loop" button to continuously loop the selected region
• Loop button glows green when active
• Use "Clear" button to remove the selection
• Make a new selection by clicking and dragging again

Working with Triggers

• Each pad can store one trigger point
• Markers are set automatically to next available pad
• Time stamps show exact trigger positions
• Click any marked pad to start from that position
• Drag red lines to fine-tune trigger positions

Trigger Point Storage

• Trigger points are automatically saved in your browser
• Points persist across browser sessions and internet connections
• Each sample's trigger points are saved separately
• Storage is specific to the browser you're using

Custom Sample Library

Build your own sample collection for quick access:

• Click Load Sample to import a local audio file
• Enter a custom title in the modal that appears
• Click Save to add to your library, or Cancel to just play it
• Access saved samples from the Custom tab in Browse Samples
• Click the × button to delete samples from your library
• Custom samples and their trigger points are saved in your browser

Effects and Controls

Each effect pad in the Dub Effects panel can add unique audio effects to your sample playback. Effects use toggle mode:

• Click once to turn an effect ON (pad lights up)
• Click again to turn the effect OFF
• Multiple effects can be active simultaneously
• Use keyboard shortcuts Q W E R A S D F to toggle effects

Pitch / Speed Control

The PITCH tab offers two independent controls:

Varispeed (Orange)

• Drag left for slower (0.5×) or right for faster (2.0×)
• Changes both pitch AND tempo together (like vinyl/tape)
• Centered at 1.0× (normal speed)
• Great for classic dub slowdown effects

Pitch Shift (Purple)

• Adjust pitch from -12 to +12 semitones (one octave each way)
• Pitch changes in real-time while audio plays
• Tempo stays the same - only pitch changes
• Uses SoundTouch WSOLA algorithm for high-quality shifting
• Perfect for creative pitch effects without speed changes

Master Volume

Use the MASTER tab to control the output volume:

• Volume Fader: Drag to adjust output level from 0% to 100%
• Green glow indicates current volume level
• Adjust volume in real-time while audio is playing
• Click Reset to return to full volume instantly
• Volume changes are smooth with no clicks or pops

Filter Sweeps

The FILTER tab provides real-time filter control and modulation effects:

Lowpass / Highpass Filters

• Lowpass: Drag to sweep from 100Hz to 20kHz - removes high frequencies
• Highpass: Drag to sweep from 20Hz to 8kHz - removes low frequencies
• RES (Resonance): Adds emphasis at the cutoff frequency for that classic "squelch"
• Logarithmic frequency scaling for natural, musical control

Modulation Effects

• Z Flanger: Classic jet-plane swoosh effect
• X Phaser: Swirling multi-stage phase modulation
• C Chorus: Thickening shimmer effect
• V Tremolo: Classic amplitude modulation (volume wobble)

Click Reset All to return all filters and effects to their default state.

Available Effects

• Echo 1, Echo 2, Echo 3: Three variations of delay effects, each with increasing delay time and depth, creating layered echo effects.
• Space: A reverb effect that adds a spacious, ambient sound to the audio.
• Tubby: A special delay effect with frequency sweeps and resonance, creating a classic dub sound.
• Drop: Emulates tape dropout, introducing a slightly distorted, vintage sound.
• Spring: A resonant reverb effect with a bouncy, spring-like quality.
• Ghost: Adds a subtle pitch modulation to create a haunting echo effect.

Experiment with different effects and combinations to add depth and style to your playback experience!

Best Practices

• Set trigger points during first playback for consistent timing
• Use the waveform display to identify key sample sections
• Clear all triggers if you want to start fresh
• Check trigger point timing before live performance