One delay pedal. One set of controls. Two completely isolated memory buffers for Vocal and Guitar. No bleed. Drop it on both sides of your rig.
Pick your format. The REAPER JSFX is ready to drop in. The VST3 is compiled for Linux x86_64. AU source is included — compile it on macOS.
Copy and run one of these on your machine. They place the plugin in the standard location for each format.
#!/bin/bash # Run this after extracting DL4Delay.vst3.zip mkdir -p ~/.vst3 cp -r DL4Delay.vst3 ~/.vst3/ echo "DL4 Delay VST3 installed to ~/.vst3/DL4Delay.vst3"↓ install-vst3.sh
#!/bin/bash # Run this to install the REAPER JSFX mkdir -p ~/.config/REAPER/Effects/keymatrix cp dl4-delay.jsfx ~/.config/REAPER/Effects/keymatrix/ echo "DL4 Delay JSFX installed. Restart REAPER."↓ install-jsfx.sh
# Build AU on macOS cd DL4Delay-AU-source mkdir build && cd build cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" cmake --build . --config Release -j$(sysctl -n hw.ncpu) # Then copy build/DL4Delay_artefacts/Release/AU/DL4Delay.component to ~/Library/Audio/Plug-Ins/Components/
Dual-Mono: The left channel (Input 1 / Vocal) and right channel (Input 2 / Guitar) each get their own delay buffer. They share the same knobs — Delay Time, Repeats, Tweak, Tweez, Mix — but the audio never crosses between them.
Models: Digital, Analog, Tape, LoRes, Sweep. Analog/Tape/LoRes/Sweep add modulation to the delay line for warmth and movement.
Use case: Drop one instance on your vocal track and another on your guitar track. Both respond to the same knob settings, keeping your delay unified across both instruments.
DL4 Delay is also built into the full Axis Pedalboard alongside Low-Cut, Tap Delay, Room Reverb, OctaBass, and Reggie Looper.
Open Axis Pedalboard Hub →