DEEP/4 Release Notes

• Updated unit panel look and feel — active tab is now light with a plastic sheen and specular highlight, inactive tabs are dark, giving clearer visual feedback for the selected unit

• Fixed MIDI sync — enabling tempo sync now immediately snaps all syncable parameters to their nearest note division value instead of waiting for manual interaction. Changing the sync modifier (straight/dotted/triplet) also re-snaps values immediately.

• Fixed preset browser arrows to cycle through user bank presets in addition to factory presets

• Slapback parameters on Gated Reverb and Reverse Reverb now display in milliseconds and are MIDI tempo syncable

• Per-unit MIDI tempo sync — lock delay times and LFO rates to your DAW's tempo on a per-unit basis.

• Draggable unit tabs — reorder effect units A/B/C/D by dragging tabs to customize your signal processing order

• Preset bank management — create, rename, and delete custom banks to organize your presets

• Import and export banks to share between sessions and back up your work, using SysEx format compatible with the original hardware

• Added mono track support — plugin now works on mono channels in all DAWs

• Eliminated scroll bar on algorithm panel by carefully sizing controls to fit within the available space

• Plugin now displays in the Effect category in Pro Tools

• Removed the "Killed" bypass state — bypass is now a simple two-state toggle (Active/Bypassed) for a cleaner, more predictable workflow

• Added keyboard shortcut hints below the unit panel for quick reference (Alt/Option+click for fine adjust, Shift+drag for snapped increments)

• Double-click a knob's value to type in an exact number — press Enter to commit or Escape to cancel

• Improved knob notch visibility with brighter, longer indicator marks

• Fixed preset change artifacts — delay RAM is now cleared when loading a new algorithm, eliminating the flanging and transients caused by stale delay data from the previous preset. Combined with an improved crossfade (30ms mute + 20ms cosine fade-in), preset and algorithm changes are now clean and seamless

• Knobs now display hardware-accurate 0–99 values (and –99…99 for signed parameters) matching the original DP/4 front panel, instead of the raw 0–127 internal range.

• Corrected parameter ranges in eight algorithms:

– Hall Reverb: Ref1 Send max corrected from 255 to 127

– Small Plate: Predelay max corrected from 500 ms to 430 ms

– Non-Linear Reverb II: Ref1 and Ref2 Time max corrected from 85 ms to 600 ms

– Expander: LowPass Fc max corrected from 29 to 39

– Keyed Expander: LowPass Fc max corrected from 29 to 28

– Phaser/DDL: LFO Rate internal range corrected from 0–99 to 0–127

– EQ/Vibrato/DDL: Vibrato Rate internal range corrected from 0–99 to 0–127

• Delay time parameters now display with a "ms" suffix (e.g. "375 ms" instead of "375").

• Fixed bug where user presets would not persist in certain cases

• Fixed UI flickering when switching presets

• Smooth crossfade between presets and algorithms to eliminate audible clicks on changes

• Added 125% UI scaling option for a middle ground between 100% and 150%

• Added value labels next to Input, Mix, and Volume knobs to make them easier to recall

• Fixed pops and clicks that occurred with Pitch Shifter in serial and feedback routing modes

• macOS compatibility extended back to Monterey (12.0)

• Hold Alt while dragging knobs or sliders for fine-grained precision control

• Hold Shift while dragging for coarse stepping through larger value ranges

• Initial release