BeepBox 4.0

• Redesigned the filter controls, allowing multiple low-pass, high-pass, and peak control points per instrument.
• Added new effects: pitch shift, detune, distortion, bitcrusher, echo.
• Added new custom instrument synthesizer type: picked string.
• Allow configuring reverb and chorus sliders per instrument.
• Allow connecting the beginning of a note to the end of a note in the previous pattern in pattern editor.
• Allow multiple simultaneous ("layered") instruments per channel. Enable it in the channel settings window.
• Allow adding envelopes to more instrument settings.
• Split out the note fade in/out settings from the transition settings.
• Added new transition option: "continue" allows tone and envelopes to continue uninterrupted across notes.
• Added new transition option allowing slides to apply between patterns.
• Moved many instrument settings (transition, chord, vibrato, panning) into the effects menu where they can optionally be enabled for any * instrument, and an optional second set of filter control points.
• Renamed many instrument options, e.g. "interval" is now called "unison" which is a more appropriate name.
• Slightly increased maximum channel counts.
• Added new fullscreen layout option.
• Added zoom in/out buttons to pattern editor in fullscreen layouts.
• Updated some of the instrument presets.

Thanks to @jummbus for beta testing!