OneButton

It is portable guitar processor, based on Guitarix, Jackd and Linux.

| BoneButton | TankButton | | ---------- | ---------- | | <img src="/doc/bonebutton-body-3d.jpg" width="200"> | <img src="/doc/tankbutton-body-3d.jpg" width="200"> | | <img src="/doc/bonebutton-body-live.jpg" width="200"> | na |

Main idea

DIY opensource guitar processor with one button, simple display and infinity ways for customization.

One footswitch can control each element in your stompbox, simple config for ex:

Init (switch to Rythm preset & display "R" letter) --> Click (switch to Solo preset & show "Skull" animation) --> Click (goto Init)
Init (Tuner off) --> Longpush (Tuner on & Mute output) --> Longpush (goto Init)

If you'd like to use additional buttons - just connect it (GPIO, USB, etc) and change hw configuration of pedal.

And any action can be used as a part of step in this live graph:

• Enable looper rec
• Change effect value
• Switch graph for click/longpush
• Go to specific graph position or back
• Any custom action that you can imagine!

About display: to show some info about current state you can use number of options:

• Led line with > 2 leds
• Led matrix
• Text display
• Graphical display
• Etc...

Managing presets is carried out using Guitarix GUI interface or WEB interface.

Additional features

• Flexible audio mapping - you can control multiple audio interfaces and manage effects for a number of instruments
• Delayed actions - click and run sequence of actions with controllable delays
• Switch presets without pause and clicking
• No cut-off when swiching presets (for ex. delay & reverb processing last output)

Target platform

It is possible to run on any linux distributive, but current target platform is Ubuntu 16.04.

Reference hardware

Right now I use the following hardware:

• Platform:
  • ODROID-C2
    • CPU: 4x 2GHz 64bit
    • RAM: 2GB
    • eMMC + MicroSD
    • 4x USB + OTG
• Audio:
  • ESI UGM96
  • ESI Maya22
• USB Bluetooth 4.0 dongle
• Rainbowduino 8x8 RGB led matrix
• Momentary soft-touch footswitch
• 3D printed case

But, you can ignore that, because RaspberryPI & any usb card with high-z input and line out can do the same thing.

Also GPIO is not required - just write small plugin python script and use any USB/UART/(interface)-driven buttons or controller for input/output interfaces.

Not recommended

• Platforms:
  • ODROID-C1+ - buggy USB (but OTG ok) can cause kernel freezes
    • CPU: 4x 1.5GHz 32bit
    • RAM: 1GB
    • eMMC + MicroSD
    • 4x USB + OTG

Installation

• Clone onebutton repo
• Install guitarix & made some changes from setup.sh
• Prepare your system to use realtime settings: http://github.com/raboof/realtimeconfigquickscan
• Change config.yaml to suit your HW configuration
• Go to plugins directory and build required plugins
• Run ./onebutton config.yaml and check logs that everything fine
• Rock & Roll!
• Optional: copy init script (upstart.conf, systemd.service) to run onebutton on system start

Bluetooth

You can manage your onebutton by using the OneControl application, but make sure that you're use bluez>=5.40 - dbus bluez profiles working properly with it. OneControl you can find here: http://github.com/rabits/onecontrol

Guitarix WEB UI

To manage Guitarix OneButton support webui interface, that placed in guitarix-webui folder. It will be used after Guitarix startup.

TODO

• Platforms:
  • Banana Pi M3
    • CPU: 8x 1.8GHz
    • RAM: 2GB
    • 2 USB + OTG
    • SATA + int eMMC 8Gb + MicroSD
    • WiFi(n)
    • Bluetooth(4.0)
  • Banana Pi M2+
    • CPU: 4x 1.2GHz
    • RAM: 1GB
    • 2 USB + OTG
    • int eMMC 8Gb + MicroSD
    • WiFi(n)
    • Bluetooth(4.0)
  • Raspberry Pi 3B
    • CPU: 4x 1.2GHz 64bit
    • RAM: 1GB
    • 4 USB + OTG
    • WiFi(n)
    • Bluetooth(4.1+BLE)

Donation

If you are great R&R man, you can support my open-source development by a small Bitcoin donation.

Bitcoin wallet: 15phQNwkVs3fXxvxzBkhuhXA2xoKikPfUy