QLab 4 Features by License Type

Feature Free Pro Audio Pro Video Pro Lighting
Channels of audio output 2 64 2 2
Channels of audio per file 2 24 2 2
Audio waveform view
Unlimited slices per Audio or Video cue
Sample-accurate playback sync
Unlimited cue lists
Unlimited cue carts
Audio fades
Live fade previews
Edit audio output routing
Edit audio output names
Audio effects on cues
Audio effects on cue outputs
Audio effects on device outputs
Audio effects fading
Audio playback rate fading
Mic cues
Single-screen video surfaces 1 1 unlimited 1
Multi-screen video surfaces unlimited
1000 video layers
Full-surface Video cues
Custom geometry Video cues
Fade Video cues
Video playback rate fading
Masking & edge blending
Surface warping & keystone correction
Video effects
Syphon input & output
Blackmagic device input & output
Camera cues
Text cues
Patchable DMX addresses 16 16 16 unlimited
Remote control via OSC, MIDI, MSC, iOS app
Network cues
MIDI cues
MIDI File cues
Pause cues
Devamp cues
Target cues
Arm & Disarm cues
Script cues
Timecode cues
Timecode triggers