Smart Midi Refine: Tools and Shortcuts for Faster Editing

Midi Refine Essentials: Correcting Velocity, Timing, and Articulation

Overview

Midi refining means polishing raw MIDI data to make performances sound more natural, expressive, and musically appropriate. The three core areas are velocity (how hard notes are played), timing (when notes occur), and articulation (note length, expression, and controller use).

1) Correcting Velocity

• Why: Uniform or erratic velocities make parts sound mechanical or uneven.
• Quick steps:
  1. Normalize or scale velocities to a target range (e.g., 40–100) to remove extremes.
  2. Use curve tools to shape dynamics across phrases (rising crescendos, falling lines).
  3. Humanize subtly by adding small, randomized velocity offsets (±2–8).
  4. Map velocities to tone (e.g., softer velocities route to different sample layers or apply low-pass EQ).
• Tip: Preserve intentional accents; don’t flatten expressive peaks.

2) Correcting Timing

• Why: Tight quantization can feel robotic; loose timing can be off-beat or sloppy.
• Quick steps:
  1. Quantize lightly — use swing settings or percentage-based quantize (e.g., 60–90%) to retain feel.
  2. Use manual nudging to fix blatantly off notes while keeping human groove.
  3. Apply groove quantize (extract from a reference track or groove template) for consistent feel.
  4. Correct note start vs. end separately (start times for rhythm, ends for articulation).
• Tip: Check how timing changes affect interaction with drums and bass.

3) Correcting Articulation

• Why: Articulation defines phrasing, legato/staccato, and realism.
• Quick steps:
  1. Adjust note lengths to match intended articulation (shorten for staccato, overlap for legato).
  2. Use CC lanes (modulation, expression, sustain, pitch bend) to add realism and phrasing.
  3. Add release/decay automation or sample layer switching for natural endings.
  4. Edit MIDI channel/keyswitches for instrument-specific articulations (e.g., pizzicato, marcato).
• Tip: Listen in context and automate subtle controller moves rather than static values.

Workflow Checklist (order to apply)

1. Fix obvious wrong notes.
2. Balance velocities (global scaling, then local edits).
3. Tighten timing with light quantize and manual nudges.
4. Shape articulations and CC automation.
5. Swap or layer samples based on velocity/articulation.
6. Final listen and small humanize tweaks.

Tools and DAW Features to Use

• Quantize with percentage and swing
• Velocity scaling, curves, and humanize
• Groove extraction and groove templates
• CC lanes (CC1, CC11, sustain, aftertouch)
• Keyswitch editing and articulation maps
• MIDI editors with piano-roll, grid-free drawing, and batch editing

Common Mistakes to Avoid

• Over-quantizing and removing the groove.
• Flattening velocities so everything sounds monotone.
• Relying only on note-lengths without controller modulation for realism.
• Making global changes without checking how they interact with other tracks.

Example quick settings (starting point)

• Velocity range: scale into 40–100
• Quantize strength: 70% with slight swing (5–15%)
• Humanize velocity jitter: ±2–6
• Note length: 10–30% shorter for staccato passages

Use these essentials to turn raw MIDI into expressive, professional-sounding parts quickly.