atarity / meeblip-triode Goto Github PK

⚠️ This is just a fork of original Meeblip Triode repo with very minor changes . I changed layout for SPDT switches to MTS-120 cause there is no chance to buy original ones in my location. Switches looks like this:

I've also compiled comprehensive BOM for Triode synth on Octopart:

• System board BOM
• Control board BOM

And Max/MSP patch to handle MIDI-only controls:

Change log V1.20 2017.02.27

• MIDI fix so that triode plays nicely with MIDI clock

V1.11 2016.11.23

• Reverted filter decay envelope to use SUSTAIN switch, as in original release

V1.10 2016.11.12

• Updated MIDI code to exit interrupt immediately if MIDI command is unrecognized
• Increased front panel switch scanning rate (10X faster)
• Reduced pitchbend to 3 semitones
• Altered filter decay envelope to ignore SUSTAIN switch so that filter sweeps continue when key is released
• Removed digital pre-filtering code (previously used on OSC A&B)
• Removed digital enveloping of OSC A & B
• Gate oscillators when amplitude envelope hits zero (prevents audio bleed through)
• Changed filter cutoff curve (use table from MeeBlip SE)
• Scale filter cutoff knob to cover 25%-100% of knob range
• Scale filter resonance knob to cover 25%-100% of knob range
• Added bandlimited square wave tables (pulse waves were previously generated with offset sawtooth ramps)
• Raw calculated waveforms are now used in the lower 4 octaves, then switch to bandlimited wavetables. -Flipped waveforms to match phase and avoid a pop when crossing the cut-over point

V1.01 2016.10.24

• Ensure MIDI channel settings are saved correctly when powered off for Channel 1-8 (implement MAXMIDI variable)
• Allow MIDI CC control of GLIDE knob to select waves when in wavetable mode (CC 61 now controls GLIDE in wavetable mode)
• Updated MIDI code to exit interrupt immediately if MIDI command is unrecognized
• Increased front panel switch scanning rate (10X faster)

V1.00 2016.10.19

• Initial release

MeeBlip hardware is released under a Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA 4.0) license. You are free to share and transform this work, even for commercial purposes, providing you:

1. Give appropriate credit, provide a link to the license, and indicate if changes were made. You can say something such as "This project is based upon the MeeBlip anode synthesizer. For more information, visit meeblip.com or download source code and design files at https://github.com/MeeBlip"

2. If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original. That means making source code, design files and PC board layout files available so someone can build and modify their own version of the project.

3. The MeeBlip name is our intellectual property. You are not allowed to release commercial devices based on our designs using the MeeBlip brand name.

Here's are links to the Creative Commons license, for the design: http://creativecommons.org/licenses/by-sa/4.0/ http://creativecommons.org/licenses/by-sa/4.0/legalcode

MeeBlip source code and documentation is released under a GPLv3 license.

A copy is available in the MeeBlip repository at: https://github.com/MeeBlip/meeblip-anode/blob/master/LICENSE

MeeBlip Contributors:

• Jarek Ziembicki - Created the original AVRsynth, upon which this project is based.
• Laurie Biddulph - Worked with Jarek to translate his comments into English, ported to Atmega16
• Daniel Kruszyna - Extended AVRsynth (several of his ideas are incorporated in MeeBlip)
• Julian Schmidt - Original Meeblip digital filter algorithm
• Axel Werner - Code optimization, bug fixes and new bandlimited waveforms
• James Grahame - Meeblip hardware and firmware development