How to caculate "tick" properly?

[humbleCoder1990]

I tried to make 1 bar with 16 notes.

So, I caculated durationTick like this.

const duration = 1920 / 16 /* 1920 ticks are 1 bar */

then,

const startTick = duration * noteIndex

But the result is almost 4 bars like the screenshot.
What are I missing something?
How to caculate ticks properly?

MidiWriterJS uses another value for meaning 1 bar of ticks?

[humbleCoder1990]

Wow I just saw another post #58,
128 ticks for per beat.
It's very confusing.

[Garrett Grimm]

Hi @humbleCoder1990,

That's correct, there are 128 ticks per beat. That's how it's specified in MIDI 🤷‍♂️