Mela 4 – AUv3: Synth, FX, MIDI 4+

DS Oscillator Module:
- This module is based on a distortion synthesis technique.
- You can morph the waveform between a square and a sawtooth using the Shape parameter.
- You can adjust the harmonic richness of the waveform using the Harmonics parameter.
- The module graph displays the waveform the oscillator is generating.
- Drag the graph horizontally to adjust the Shape parameter or vertically to adjust the Harmonics parameter.
- Double-tap the graph to reset the waveform to the default shape.
- In Mela 2-3, this oscillator was known as "Pitch Dist", but the new module name describes the algorithm more accurately.

Vibrato Module:
- The Pitch Processor module applies vibrato to the input Pitch signal.
- It's driven by a sinusoid LFO which retriggers on every note-on event only if no other notes are held.
- The LFO's rate can be tempo synced or set in hertz.
- The module can be inserted either on the Audio or Instrument lane.

Pitch Ratio Module:
- The Pitch Processor module modifies the input Pitch signal by multiplying it by a ratio of 2 integers. This is especially useful for ring and frequency modulation synthesis.
- The Ratio control displays the resulting ratio multiplier that's applied to the input Pitch signal.
- The ratio is simplified by reducing the numerator and denominator to coprime numbers.
- Tapping on the control gives you the option to quickly set the ratio to one of the common musical intervals.

Pitch Bend Module:
- The Pitch Processor module transposes the input Pitch signal according to the Pitch Bend MIDI messages it receives.
- Its parameters allow you to set positive and negative transpositions to have different values.
- The module displays the current Pitch Bend value in semitones as well as provides visual indicators for the Pitch Wheel position.

MIDI Source Module:
- All MIDI CC messages are now supported by MIDI Source.
- The module now also supports Release Velocity.
- The Input parameter's "Random" value was renamed to "Random on Note-on" to improve clarity.
- Added the Smoothing parameter, which is useful for smoothing out the discontinuities in the modulation signal generated from the incoming MIDI messages.

User Interface:
- Mela's UI has been simplified by merging the sidebar functionality into the toolbar.
- Removed redundant buttons.
- Tapping on the Preset Selector will toggle the Preset Browser visibility.
- On the iPhone, the lanes now extend to the edges of the device, utilising the screen fully.

Theme Designer:
- Added the Theme Designer in the Settings.
- It allows you to customise Mela's appearance.
- When the Theme field is set to "Custom" the Theme Designer becomes accessible.
- Use the Copy and Paste buttons to save and load custom themes.
- It's a list of 5 colours in hex format in plain text and can be easily shared with other Mela users.
- You can view themes created by other artists by tapping on "Artist Themes".
- Added "White" as one of the selectable themes.

Other Changes:
- Mela now allows the host to query for a small number of the plug-in's most important parameters. Mela defines these based on what the user has assigned to the Perform View. For example, Logic Pro for iPad will display the first 3 parameters of the Perform View.
- Changed FM Operator's Intensity maximum value from 800% to 400%.
- Fixed a preset title text to be correctly truncated when it's too long to fit properly.
- Fixed the Settings toolbar being truncated in Logic Pro for iPad.
- Updated the Getting Started document.
- Added presets that showcase new features.