note this is just for personal use only; gives me something to blow off steam while i take a break from vibe coding. I had brainstormed the idea previously on my own; as I have owned previous instruments and DAW's, took the idea to Opus and asked it to strategically create a prompt that covers all my needs, I also told it to make note of my Fable usage ( I'm only using a Pro acccount, 5 hr block then resets ) and if it cannot finish the one shot attempt, make me a save state and a session summary / filepaths bookmark / errors log with a Terminal command that saves these notes onto Obsidian, notes are created so if project isn't done, Claude can read and pick up exactly where I left off. I was so excited with the idea that I left off the wav splicer and mixing console features, that addition took anothee 40% of usage, spent the last 20% praising Fable / Claude for an INCREDIBLE job it did for me

SG-16 SIGNAL — Detailed Features Breakdown

Overview

SG-16 SIGNAL is a browser-based hardware-inspired sampler & groovebox that brings classic SP-1200 and TR-808 aesthetics to the web. Everything runs client-side in pure HTML/CSS/JavaScript with Web Audio API—no plugins, no server dependencies, no subscription. Load samples, sequence beats, sculpt sounds, mix, and export your session.

Core Features

1. 16-Pad Sampler with Full Waveform Editor

• 4×4 grid layout inspired by classic MPC/Maschine pads
• Drag-and-drop sample loading or direct upload from your DAW bounces
• Waveform editor with:
  • Visual start/end trim markers (drag to adjust)
  • Transient detection (auto-find drum hits)
  • Manual slice placement (tap/click to mark slice points)
  • Auto-chop (quick grid division: 2, 4, 8, 16 slices)
  • Slices-to-pads workflow (convert slices into individual playable pads)
• Real-time waveform canvas with zoom/scroll support
• Each pad stores: name, pitch offset, sample start/end, vintage filter mode, choke behavior

2. Drum Kit System

• Multiple drum kits loadable with one click
• Kit presets store complete pad setups (808, 909, acoustic, custom)
• Switch between kits without losing your current sequence

3. Step Sequencer (Drum Patterns)

• 16-step pattern grid with live triggering
• Color-coded step caps (red, orange, yellow, cream) matching classic TR-808 lineage
• 4 rows representing 4 drum sounds
• Visual feedback: lit pad shows currently playing step
• MIDI learn compatible (map pads to hardware controllers)
• Pattern modes: 1/4, 1/8, 1/16 note subdivision support
• Choke groups (e.g., open/close hi-hat layering)

4. Synth Sequencer

• Polyphonic synthesis (16+ voices)
• Step grid for melodic sequences (not just percussion)
• Synth modes:
  • Wavetable synthesis
  • Sub-oscillator layer
  • Tuned/untuned percussive hits
• Per-step parameter control (pitch, amplitude, effects)

5. Analog-Style Mixer Console

• 7-channel mixing strip (DRUMS, SYNTH, returns, master)
• Per-channel EQ (3-band: HI/MID/LO with dedicated freq knob)
• Stereo panning (L/C/R with visual feedback)
• Level faders (0–125% gain)
• Mute/Solo buttons with visual indicators
• Reverb send (wet/dry control)
• Real-time audio metering and level automation

6. Filter & Modulation

• Vintage filter modes (inspired by classic SP-1200/TR-filters)
  • Resonance peak control (0–11 range)
  • Cutoff frequency sweep
• ADSR envelope per pad (Attack, Decay, Sustain, Release)
• LFO modulation (optional on selected parameters)
• Pitch bend on sample playback

7. Effects Rack

• Built-in reverb with mix control
• Bit-depth reduction (lo-fi/8-bit crunch)
• Sample-rate reduction (aliasing/downsampling for vintage vibe)
• Vinyl crackle overlay
• Saturation/compression on master

8. Performance Controls

• Transport buttons: PLAY, STOP, REC (with visual LED feedback)
• Tempo control (BPM knob, 40–180 range)
• Master level output gain
• LCD display with:
  • Real-time song position/meter
  • Current sample name & pad info
  • Status messages (e.g., "TRANSIENTS FOUND", "CHOP x8")

9. Waveform Analysis Tools

• Transient detection algorithm (energy envelope + peak finding)
  • Auto-identifies drum hits within selected range
  • Limits to 15 slices (prevent over-chopping)
• Manual marker placement (click waveform to add slice)
• Marker deletion (click existing marker to remove)
• Smart slice placement (respects start/end bounds, prevents overlaps)

10. Session Management

• Auto-save to localStorage (no cloud required, session persists across refreshes)
• Full session state stored:
  • All 16 pads (audio + metadata)
  • Mixer settings
  • Sequence patterns
  • Synth patches
  • Effects states
• Export as JSON (backup, share setups with friends)

11. Hardware-Inspired Design

• Authentic physical modeling:
  • Brushed steel chassis with threaded screws (inset top/bottom corners)
  • Warm grey panel (SP-1200 color palette)
  • Deep blue silkscreen text
  • Red/orange/yellow/cream step button colors (TR-808 inspired)
  • Mechanical knobs with line indicators
  • LED indicators with glow effects
  • 3D button press animations
  • LCD screen with amber/black monospace text
• Responsive layout: adapts to desktop, tablet, mobile (sidebar drawer on small screens)

Under the Hood

Audio Engine

• Web Audio API for synthesis & processing
• AudioContext with sample-rate negotiation (44.1k–96k support)
• Polyphonic voice allocation (16+ concurrent notes)
• Real-time buffer processing (no latency headroom issues)
• Waveform rendering via Canvas 2D

State Management

• Single-source-of-truth state object (all settings centralized)
• Delta persistence (write changes to localStorage only when modified)
• Full serialization of audio buffers as base64 (WAV format)

Performance Optimizations

• Lazy waveform rendering (canvas only redraws when needed)
• Debounced slider updates (reduces redundant audio graph updates)
• Event pooling for pointer/touch handling
• Memory caching of crushed samples (bit-depth reduction pre-computed)

Workflow Examples

Beat-Making

1. Load a drum kit (kicks, snares, hats)
2. Program a 16-step drum pattern
3. Tweak kick filter cutoff on the mixer
4. Toggle reverb send on the snare
5. Play & adjust in real-time
6. Export JSON or audio bounce

Sample Chopping

1. Load a vocal loop (drag-and-drop)
2. View waveform, tap to mark slices
3. Hit "Slices > Pads" to populate empty pads
4. Sequence the sliced pads in the step grid
5. Add filter automation for melodic effect

Sound Design

1. Load a snappy drum hit
2. Adjust vintage filter (cutoff + resonance)
3. Tweak ADSR envelope (shorter attack for hi-hats)
4. Add reverb send for space
5. Dial in bit-depth reduction for lo-fi crunch

*PATCH EDIT; added tools*

SG-16 SIGNAL — Updated Features (July 2026)

A browser groovebox just got four massive upgrades. Here's what shipped:

NEW: Audio Recorder / Bounce-to-WAV

The #1 gap is now closed: capture your mix to a file.

• Hit REC (or press R), play your beat, hit STOP → instant WAV download
• Records the master output post-limiter, so everything you hear gets captured — pads, synths, reverb, and performance FX all baked in
• Elapsed time displays in the LCD: REC 00:04
• Auto-named files: sg16-120bpm-<timestamp>.wav (16-bit stereo, 44.1k–96k)
• 6-minute safety cap per session (prevents runaway files)
• No server, no uploads — your audio stays on your machine

NEW: Song Mode — Pattern Chaining / Arranger

Turn the loop machine into a track machine.

• 8 pattern slots (A–H): SAVE the live grid to any slot, LOAD it back, or CLEAR it
• Build a chain: tap + CHAIN mode, then tap slots to append them — your song becomes A×4 B×4 C×2 D×1… visible as a reorderable row
• Two transport modes: PATTERN (loop the live grid, classic behavior) or SONG (play the chain)
• Live grid never clobbered: SONG playback reads the snapshots directly; edit the live grid while the song runs
• Loop or stop at chain end: LOOP ON wraps, LOOP OFF halts transport when done
• Phase-accurate advancement: pattern changes happen at bar boundaries, sample-locked to the sequencer
• LCD shows context: SONG A 2/4 [1/3] (slot, current repeat / total reps, chain position)
• UI: new SONG tab with bank, chain builder (reorder with ‹›, adjust reps with ±, delete ✕), and transport controls

NEW: Performance FX — Master Bus Live Effects

Four momentary/latching effects that process the master in real time. Insert order: MASTER → FILTER → STUTTER → TAPE → GATE → LIMITER (limiter stays last).

Filter Sweep

• Resonant lowpass on the master, full-open = transparent bypass
• Cutoff knob (120Hz–16kHz log) + Resonance (0.5–16)
• Toggle ON/OFF to engage/disengage

Beat Repeat / Stutter (Hold-to-Repeat)

• Hold a button to freeze the master output and loop it — classic SP-1200 behavior
• Captures a short slice (~1/16th of a bar) and recirculates it while held
• Release to exit cleanly
• Rate selector: 1/4, 1/8, 1/16, 1/32 note division
• Retunes live when you change BPM (no awkward skips)

Tape Stop (One-Shot Spin-Down)

• Emulates the analog feel of a tape machine slowing to a halt
• Technically honest: ramps a delay-time curve to pitch the audio down to silence over 0.25–2.0 seconds (knob-selectable)
• Pairs with a closing lowpass and volume fade for authenticity
• Note: this is an emulation, not true varispeed — Web Audio doesn't support master playbackRate

Gate (Trance Chop)

• Rhythmic amplitude gate synced to your tempo
• Toggles ON/OFF (latching)
• Rate: 1/4, 1/8, 1/16, 1/32 note division
• Depth: how much the gate chops (0–100%)
• Starts its cycle aligned to the next step boundary when you engage it during playback

True-Bypass Design

• Every effect is off by default, dry/wet crossfade when engaged
• All FX off = tone-identical to the original wiring (pure gain nodes, zero color)
• Recorded: the REC button captures all FX in the master output

NEW: MIDI Routing Modes

Web MIDI input just got smarter. Three routing behaviors, choose your workflow:

AUTO (original behavior preserved)

• When SAMPLER is armed: incoming notes 36–51 fire the 16 pads
• When SYNTH is armed: incoming notes play the armed voice
• Maintains 100% backward-compatibility with existing MIDI setups

PADS (force pad triggers)

• Notes 36–51 (standard MPC/GM drum range) always fire the sampler pads
• All other notes play the armed synth voice
• Lets you control both pads and keys from one keyboard

KEYS (force synth playing)

• All incoming notes play the armed voice, regardless of which synth engine
• Pads are never triggered from MIDI
• Pure melodic control

Enhanced Device Readout

• LCD shows connected device name + count: MIDI: AKAI MPK MINI (+2) CONNECTED
• Detects hotplug events (connect a controller mid-session, it appears immediately)
• Graceful fallback if your browser doesn't support Web MIDI

Why This Matters

✅ No installation — open in browser, start making instantly
✅ Privacy-first — all audio stays on your machine (localStorage only)
✅ Authentic hardware feel — respectful skeuomorphism, not over-designed
✅ Deep editing — waveform slicing, filter automation, transient detection
✅ Professional audio — full 16-bit/44.1k–96k Web Audio pipeline
✅ Portable — session files as JSON (share beats, collaborate)
✅ Fast — pure client-side, no API calls, instant response