Mela 6.12 Update: More Improvements to MIDI Processors & VA Oscillator
Mela 6.12 is here with further improvements to the MIDI Processor modules and the VA Oscillator. With this update, the transition to making the On parameter performance-oriented across all modules is now complete. This makes the On parameter an ideal target for modulation and automation to achieve expressive and creative results.
For example, modulating the Arpeggiator’s On parameter will stop arpeggiating and retrigger the input chord to the output when the value drops below 50%, creating dynamic harmonic variations.
The VA Oscillator’s “Full-Wave Rectified Sine” and “Half-Wave Rectified Sine” waveforms have been merged into a single “Rectified Sine” that supports the Shape parameter, allowing smooth morphing between the two. The “Alternating Sine” waveform also now supports the Shape parameter, enabling a continuous transition from a pure sinusoid.
Finally, adding, removing, or moving a module now forces all modules to reset, preventing stuck notes even while the preset is receiving note-on events.
There’s a lot more in this update. For the full details, check out the Changelog.

Latest Tutorial
This video highlights new features in Mela 6.12. With this update, the transition to making the On parameter performance-oriented across all modules is now complete. MIDI Processor modules have also been improved, and each now uses the On parameter in a way that best suits its function. For example, the Arpeggiator retriggers the input chord when turned off, while the Quantiser simply stops quantising new notes. The VA Oscillator now offers expanded shape-morphing capabilities. The “Full-Wave Rectified Sine” and “Half-Wave Rectified Sine” waveforms have been merged into a single “Rectified Sine,” which can smoothly morph between the two using the Shape parameter.
Mela 6.12 Changelog
VA Oscillator
- Merged the “Full-Wave Rectified Sine” and “Half-Wave Rectified Sine” waveforms into a single “Rectified Sine” that supports the Shape parameter, allowing it to smoothly morph between the two shapes.
- The “Alternating Sine” waveform now supports the Shape parameter, allowing it to smoothly morph from a pure sinusoid.
- Factory Presets: The new “G0 Euclid” and “Demo 6.12” presets in the Synth FX group showcase the new features.
MIDI Processors
- With this update, the transition to making the On parameter performance-oriented across all modules is now complete.
- The On parameter of the following modules is now more performance-oriented: Arpeggiator, Note Echo, Note Range, Scale, Strummer, and Quantiser.
- Each MIDI Processor uses the On parameter in a way that best suits the module’s function.
- For example, the Arpeggiator retriggers the input chord when turned off, while the Quantiser simply stops quantising new notes.
- Note Range & Scale: Changing any parameter, including On, updates the output by releasing some held notes and triggering new ones as required.
- Chord Module: Fully rewritten internal logic, making the module more robust, especially when its parameters are modulated.
- Note Stack: Removed the redundant On parameter.
- Note Stack: The module no longer creates a note-on event for a note in the Wait stack if it’s also going to be released in the same call as the note-on that freed a slot in the Play stack.
- Note Stack: The module no longer generates redundant note-on/off pairs when receiving multiple note-ons simultaneously.
- Note Length: Fixed an issue where the note length value didn’t always initialise correctly.
- Arpeggiator: Fixed an issue in Chord mode where a note-off event could be generated for a new input note-on before it was sequenced.
- Transposer & Scale: Fixed a stuck note issue that could occur in certain edge cases.
Other Changes
- Stuck Notes: Adding, removing, or moving a module now forces all modules to reset, preventing stuck notes even while the preset is receiving note-on events.
- Amp Envelope: Fixed an issue in Mono mode where note-on events weren’t detected correctly when Legato was enabled and multiple notes were received simultaneously.
- Fixed a crash that could occur when a modulator’s last target module was removed from the preset.
- User Guide: Added the new “Module On Parameter” section to the Core Concepts chapter.
I release updates regularly, guided by user feedback and Mela’s long-term vision. Along with the User Guide, you might find the Tutorials, Changelog, and FAQ helpful. For bug reports or feature requests, visit Mela Feedback. Feel free to get in touch anytime.
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