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paper_bits:pb702_midi_synth [2020/03/20 20:34] admin [Software] |
paper_bits:pb702_midi_synth [2020/06/11 22:13] (current) |
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| ===== PB702 MIDI Synthesizer ===== | ===== PB702 MIDI Synthesizer ===== | ||
| - | The MIDI Synthesizer gives the possibility to connect your Paper Bits to a Midi Keyboard like the[[sound_boards:midi_keyboard|MIDI Keyboard]]. It is polyphonic up to six notes and has three different waveforms: square, triangle and sine.\\ | + | {{:paper_bits:pb702_midi_synth.jpg?600|}}\\ |
| - | It's basically an Arduino clone running a small program based on the wonderful [[http://sensorium.github.io/Mozzi/|Mozzi]] library.\\ | + | |
| - | For burning the bootloader look here:\\ | + | The MIDI Synthesizer gives the possibility to connect your Paper Bits to any Midi Keyboard, such as the [[sound_boards:midi_keyboard|MIDI Keyboard]]. It is polyphonic up to six notes and has four different waveforms: square, triangle, saw tooth and sine.\\ |
| - | [[avr_bootloader:avr_bootloader_main|AVR & Bootloader]]\\ | + | It's basically an Arduino clone running a small program based on the wonderful [[http://sensorium.github.io/Mozzi/|Mozzi]] library.\\ |
| - | For uploading the program one needs an USB to Serial adapter or an Arduino:\\ | + | |
| - | [[arduino_clones:serial_adapter|The Arduino as a Serial Adapter]]\\ | + | |
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| ---- | ---- | ||
| ==== Software ==== | ==== Software ==== | ||
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| + | First of all one needs a bootloader on the Atmega chip. For burning the bootloader follow the [[avr_bootloader:avr_bootloader_main|AVR & Bootloader]] manual.\\ | ||
| + | For uploading the program one needs an USB to Serial adapter or an Arduino to mimic one: [[arduino_clones:serial_adapter|The Arduino as a Serial Adapter]]\\ | ||
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| === Mozzi and MIDI === | === Mozzi and MIDI === | ||
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| === Mozzi Glitch === | === Mozzi Glitch === | ||
| Unfortunately the latest version of Arduino is responsible for a timing glitch in the Mozzi library. Arduino changed the compiler from O2 to Os. Now the uploaded code is smaller but a timing problem appears, too. Here is an description about the problem here: | Unfortunately the latest version of Arduino is responsible for a timing glitch in the Mozzi library. Arduino changed the compiler from O2 to Os. Now the uploaded code is smaller but a timing problem appears, too. Here is an description about the problem here: | ||
| - | [[https://www.instruc tables.com/id/Arduino-IDE-16x-compiler-optimisations-faster-code/]]\\ | + | [[https://www.instructables.com/id/Arduino-IDE-16x-compiler-optimisations-faster-code/]]\\ |
| To fix the glitch one has to downgrade the compiler. Change in: arduino-x.x.x\hardware\arduino\avr\platform.txt the compiler from **-Os** into **-O2.**\\ | To fix the glitch one has to downgrade the compiler. Change in: arduino-x.x.x\hardware\arduino\avr\platform.txt the compiler from **-Os** into **-O2.**\\ | ||
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| + | ==== License ==== | ||
| + | The PB702 MIDI Synthesizer was designed by **Wolfgang Spahn**, 2017-20.\\ | ||
| + | It is licensed under a [[http://creativecommons.org/licenses/by-nc-sa/4.0/"|Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License]]. | ||
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| + | <html> | ||
| + | <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" /></a> | ||
| + | </html> | ||
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| + | ---- | ||
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