Programming a Strum That Sounds Like a Hand, Not a Chord

A chord played on a keyboard is six notes at the same instant. A chord played on a guitar is six notes arriving one after another, in a direction, at different volumes, with the hand still moving afterwards.

Every difference in that sentence is programmable, and most MIDI guitar parts implement none of them.

Spread the Strum Before Anything Else

A pick crossing six strings takes real time. Fifteen to thirty-five milliseconds is the working range, tighter on aggressive fast playing and wider on a slow open ballad strum.

Take your block chord and offset each note from the one below it by three to six milliseconds. That is the entire technique and it does more than everything else on this page combined.

The friction is that quantising afterwards destroys it, which people do without thinking when tidying a part. Quantise the first note of each strum only, or lock the offsets into the pattern before you go anywhere near the grid.

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Make the Direction Audible

A downstroke starts at the lowest string. An upstroke starts at the highest. Reversing the note order is most of what tells a listener which one they just heard.

Upstrokes also differ in coverage. A player pushing back up usually catches only the top three or four strings rather than all six, because the hand is already travelling away from the bass. So an upstroke has no low note, fewer notes overall, and a lower velocity.

Program that literally. Downstroke: six notes, low to high, full velocity. Upstroke: three or four notes, high to low, velocity ten to twenty points under.

The mistake is treating up and down as the same event flipped. They are different gestures producing different chords, and copying the downstroke backwards gives you a strange full-voiced upstroke that no guitarist plays.

Assign Strokes to the Pulse, Not to Your Pattern

Here is the one that separates a part that grooves from a part that is merely accurate.

A strumming hand does not stop. It keeps moving down-up-down-up in constant eighths or sixteenths through the whole bar, and where the pattern has a rest the hand simply misses the strings. That means the direction of any given strum is decided by where it falls in the bar, not by what you wrote before it.

So map the pulse first. If you are in eighths, every downbeat and every offbeat has a fixed direction, and any strum landing on beat two and a half is an upstroke whether or not the previous strum was a downstroke.

Getting this wrong is why patterns that look correct feel wrong. The notes are right, the accents are right, and the physical logic underneath is impossible, which the ear registers as stiffness without being able to say why.

Leave the Noise In

Fret noise is the detail people remove because it sounds like a mistake, and it is the detail whose absence they notice.

Every chord change on a wound string produces a squeak as the fingers slide. Every strum has pick attack before the note. A hand resting back on the strings damps them with a dull thud rather than silence.

Most libraries sample all three and put them on a control you can turn down. Turn it up instead, then pull it back only if it is genuinely distracting in the mix. Position the fret noise just before the chord change rather than on it, because the hand moves before the strum lands.

The catch is exposure. Fret noise sitting under a full arrangement is texture, and the same amount on a solo guitar in a quiet cue is a distraction. Automate it rather than setting it once.

Vary the Chord, Not Only the Velocity

The last thing, and it is the one that survives repeated listening.

A guitarist does not play the same six strings every time. Some strums catch five, some catch four, the bass note changes as the thumb moves, and a fast passage drops notes the hand did not reach.

So edit the chords themselves across a repeated pattern. Drop the lowest string on a couple of strums, drop the top on others, and let one or two land on only three notes. Velocity variation alone gives you the same chord at different volumes, which is a fader move rather than a performance.

Where the library models it, palm muting is the strongest version of this. A muted strum is a different sound rather than a quieter one, and alternating muted and open strokes is most of what rhythm guitar actually is.

The check that catches everything above: loop four bars and listen for whether anything repeats exactly. If any two strums are identical, a hand did not play them.