Two hours of audio and MIDI. Up to 16 channels of each. Every note, expression, pitch bend, and MPE gesture kept until you need it.
Put BUFFR on a track, bus, vocal, or your master. Connect it directly to your MIDI keyboard and capture every jam without adding the plugin to every instrument. Then drag out exactly the channels you want.
Want only part of the sound? Select a frequency range and extract it with FFT, linear-phase, or minimum-phase processing.
BUFFR exists because Linux needed a real alternative to Edison and Bird’s Rolling Sampler. Edison is Windows-only. Rolling Sampler’s drag and drop did not work on my Linux setup. So I built the recorder I wanted and made it work on macOS, Windows, and Linux.
I open-sourced the cross-platform drag-and-drop protocol behind BUFFR. Use it in your own plugin—complete with a tiny clip preview under the pointer. 
Features
Capture
- Up to 16 channels of retrospective audio capture
- MIDI notes, velocity, CC, pitch bend, pressure, MPE, and expression
- Host + Global MIDI — listen while BUFFR sits on the master
- Rolling, record, or on-detect capture from 1 to 120 minutes
Find
- Waveform, oscilloscope, and full-bin FFT heatmap views
- Independent audio and MIDI lanes, selections, playheads, and zoom
- Zero-crossing, transient, and MIDI-grid snapping
- Jam markers with host bar and tempo in filenames
Export
- Drag audio, MIDI, and spectral selections into the host
- FLAC/WAV 24-bit plus lossy audio formats; MIDI as SMF
- True-peak normalization to 0 dBTP
- WAV, FLAC, MP3, M4A/AAC, Ogg/Opus, and AIFF import
Compatibility
- CLAP and VST3 on macOS, Windows, and Linux
- Preset themes and live seed-based custom themes
- Background archive for long buffers
Specs
- Status
- Free beta through August 9, 2026
- Audio
- Up to 16 channels
- MIDI
- 16 channels + Global MIDI
- Buffer
- Up to 120 minutes
- Formats
- CLAP, VST3
- Platforms
- macOS, Windows, Linux
Downloads
Each installer includes CLAP and VST3.
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