Digital Kalimba v1.0.9 - Production Release

Digital Kalimba v1.0.9

Production Release:

• Features: 7-voice polyphony, 5 selectable scales, stereo reverb, octave shift.
• Web Flasher: Updated to v1.0.8 with robust 1024-byte transfer and graceful reboot handling.
• Documentation: Corrected all wiring diagrams and pinout references.

Control Layout (Final):

• Buttons: D1-D7 (Pins 2-8)
• Pots:
  • A0: Brightness
  • A1: Decay
  • A2: Octave Shift
  • A3: Scale Select
  • A4: Reverb Mix
  • A5: Reverb Time

Visit the Web Flasher to install directly from your browser.

Digital Kalimba v1.0.1

Digital Kalimba v1.0.1

Firmware Updates:

• Finalized 7-button polyphonic synth controls.
• Scales: Pentatonic Major, Dorian, Chromatic, Kalimba, Just Intonation.
• Controls:
  • Octave Shift: -2 to +2 (A2)
  • Scale Select: A3
  • Reverb: Mix (A4), Time (A5)
  • Brightness (A0), Decay (A1)

Documentation:

• Updated web-flasher descriptions.
• Synced wiring docs.

v1.0.0 - Multi-Scale Synthesizer

Multi-Scale 7-Button Synthesizer for Daisy Seed

Transform your Daisy Seed into a versatile polyphonic synthesizer with 5 selectable musical scales!

🎹 Features

Musical Scales

• Pentatonic Major - G Major pentatonic (G, A, B, D, E, G, A)
• Dorian Mode - D Dorian mode (D, E, F, G, A, B, C)
• Chromatic - Half-step chromatic scale (C, C#, D, D#, E, F, F#)
• Kalimba Traditional - Traditional kalimba tuning
• Just Intonation - La Monte Young style harmonic tuning

Controls

• 7 Buttons - Polyphonic triggering (all buttons can play simultaneously)
• A0 Pot - Brightness control (0.5 - 1.0)
• A1 Pot - Decay/Sustain control
• A2 Pot - Transpose (±12 semitones, full octave range)
• A3 Pot - Scale selector (rotate through 5 scales)
• A4 Pot - LFO Rate (vibrato speed, 0.1 - 20 Hz)
• A5 Pot - LFO Depth (vibrato intensity, 0 - 15%)

Display

• OLED Screen - Shows current scale, transpose amount, active buttons, and note names
• Real-time parameter visualization

📦 What's Included

• DigitalKalimba.bin - Compiled firmware (104 KB)
• Web-based flasher (no command-line tools needed!)
• Complete wiring documentation
• Source code and build scripts

🚀 Quick Start

Option 1: Web Flasher (Easiest)

1. Open web-flasher/index.html in Chrome/Edge
2. Put Daisy Seed in bootloader mode (hold BOOT, press RESET, release BOOT)
3. Click "Connect to Daisy Seed"
4. Click "Flash Firmware"
5. Press RESET on Daisy to start!

Option 2: Command Line (dfu-util)

# Put Daisy in bootloader mode first
dfu-util -a 0 -s 0x08000000:leave -D DigitalKalimba.bin

📊 Performance

• CPU Usage: ~12-15% (85% headroom for future effects)
• Binary Size: 104 KB (80.61% flash usage)
• Latency: ~0.08ms (4-sample blocks @ 48kHz)
• Polyphony: 7 simultaneous voices

🔧 Hardware Requirements

• Electrosmith Daisy Seed
• 7 momentary push buttons (active-low)
• 6 potentiometers (10kΩ linear)
• 0.96" OLED display (SSD1306, I2C, 128x64)
• Audio output connection

Full wiring guide included in repository.

🎵 What's New in v1.0.0

• Complete transformation from single-scale to multi-scale synthesizer
• 5 distinct musical scales with instant switching
• Real-time transpose (±12 semitones)
• Updated OLED display with scale visualization
• Simplified codebase (removed reverb/tremolo)
• Web-based firmware flasher
• Comprehensive documentation

📝 Credits

• Algorithm: Karplus-Strong physical modeling synthesis
• Platform: Electrosmith Daisy Seed (STM32H750)
• Libraries: libDaisy, DaisySP
• Inspired by: Traditional kalimba, La Monte Young's just intonation works

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Built with ❤️ using Karplus-Strong synthesis