Building the MeeBlip micro, an affordable, open source synth on a single board, at Toronto's InterAccess Gallery.

1. meeblip.com -
MeeBlip micro
PETER KIRN, createdigitalmusic.com
http://flavors.me/peterkirn
Saturday, September 24, 2011

2. Meet MeeBlip
• James Grahame, Reflex Audio (Calgary) +
Peter Kirn createdigitalmusic.com
• Hackable, playable, affordable sound
• GPLv3 license + Creative Commons
• Monophonic, MIDI
• 16-bit sound, 8-bit (AVR) brain
Saturday, September 24, 2011

3. The micro
• Same sounds, same digital filter, PCM audio,
MIDI input
• Mini output (bridged mono to stereo)
• 8 + 8 analog + digital inputs
• (Prototype) Header programmer
• (Final) USB programming
Saturday, September 24, 2011

4. The micro
• Standalone, portable operation
• Low cost
• Use it with a MIDI keyboard that has
knobs, switches/buttons
• Use novel input controls for modulation
• Build a project (installations, wearable)
Saturday, September 24, 2011

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19. • C1 = 0.33 uF
• C2 = 0.1 uF (blue)
• C3 = 470 uF (navy)
• C12 = 4.7
• C14 = 10 (taped)
Saturday, September 24, 2011

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29. avrdude
• avrdude
• avra (compilation)
Saturday, September 24, 2011

30. MIDI
• Notes
• Control change
Saturday, September 24, 2011

31. micro MIDI
Knobs (scaled 0-254) Switches
.MIDIMODWHEEL = MIDICC 01
DETUNE = MIDICC 48 OSCA WAVE = MIDICC 62
PULSE_WIDTH = MIDICC 49 OSCB WAVE = MIDICC 63
PORTAMENTO = MIDICC 50 OSCB ENABLE = MIDICC 64
VCFENVMOD = MIDICC 51 OSCA NOISE = MIDICC 65
PANEL_LFOLEVEL = MIDICC 52 OSCB OCTAVE = MIDICC 66
LFOFREQ = MIDICC 53 LFOWAVE = MIDICC 67
CUTOFF = MIDICC 54 LFOMODE = MIDICC 68
RESONANCE = MIDICC 55 LFODEST = MIDICC 69
ATTACKTIME = MIDICC 56 LFOKEYSYNC = MIDICC 70
DECAYTIME = MIDICC 57 DISTORTION = MIDICC 71
SUSTAINLEVEL = MIDICC 58 DCFTRACK = MIDICC 72
RELEASETIME = MIDICC 59 DCFMODE = MIDICC 73
OSCMIX = MIDICC 60 MODWHEEL = MIDICC 74
FMDEPTH = MIDICC 61
switch values are read such that 0-127 is
"off" and 128-255 is "on".
Saturday, September 24, 2011

32. A quick look at Pd
• Understanding patching
• midiin, midiout
• notein, noteout, makenout
• ctlin, ctlout
• Quick math = easy MIDI music!
Saturday, September 24, 2011

33. MeeBlip,
MeeBlip micro
PETER KIRN, createdigitalmusic.com
http://flavors.me/peterkirn
http://meeblip.com
Saturday, September 24, 2011