Slicing and subdividing patterns: alternative to @ mini notation?

Hello club,

I've been exploring rhythms created by combining two simple operations: slicing and subdividing. Slicing means selecting an arc or time span on a grid by specifying grid indices. Subdividing means dividing that selection into a number of equal-sized parts. The following example shows a rhythm created with these two operations:

If i want to subdivide 16th notes 3-6 by 7, 7-12 by 4, and 12-15 by 9, it's tricky to write out because it requires counting and summing several numbers. The subdividing part is easy in Tidal. What's tougher is slicing or "sub-gridding" in mini-notation. You need to ensure the total sum of arcs adds up to 16 for this example. I'm pretty sure this is how you'd write it out:

d1 $ struct "t!3  [t!7]@3 t  [t!4]@5  [t!9]@3 t " 

Coding the subdivisions 7, 4, and 9 is beautifully straightforward with Tidal. The time spans (arcs), less so--I had to subtract values to get each time span (after the '@' symbol) and keep track of the total time span by adding the parts.

For notation I'm using 0-based indexing and 3-6 means the arc spanning notes 3, 4, 5. Can be written as [3, 6) (left-inclusive, right-exclusive).

Here's another example and a figure to show the notation:

Cycle 1: divide the last 6 8th notes by 7. Cycle 2: divide the last 5 8th notes by 7.

d1 $ struct "< [t@2 [t!7]@6]  [t@3 [t!7]@5] >"

I wonder if there is a better way to do slicing / select subgrids than with multiple @ symbols and summing them in my head? Maybe a function i'm missing out on or a trick that requires less counting?

:elephant:

1 Like

Slight offtopic, but is there a reason to use struct instead of n notation ?

it's portable, separating rhythmic and harmonic elements so you could, for example, take the rhythm component and double it with a kick drum sample which you won't want pitch adjusted.

Or you could provide a rhythmic counterpoint but reuse the harmonic elements.

Even more simply, you can easily change up/pattern the rhythm differently while leaving the harmonic elements alone.

1 Like