Martin Eastwood has ported Muxer's open source Instant Sampler Audio Unit plug-in to Windows as a VST effect.

InstantSampler is a simple sampler that records audio from the audio input when a MIDI note is played for the first time. Any consecutive time you play the same note, it plays back the recorded audio with the possibility to vary or trigger:

• Velocity.
• Attack and release.
• The level of the input audio which is passed unaffected while no samples are played.
• Playback speed using the pitchbend control.
• Normal or reversed playback.
• Looped scrolling, which enables you to use the modulation wheel to control the position in a sample at which small loops are played (e.g. "hello" becomes "h-h-e-e-l-l-o-o").
• Clearing of the sample memory.