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1

MilkyTracker Support / Re: FAQ: BPM/SPD/Rows/Ticks etc

« on: April 17, 2019, 09:44:00 »

Here is test Comparison Spd 6 / Spd 5

https://youtu.be/2uDxra6O3VM

Milkytracker
Time signature 4/4 BPM `value` = 125

Comparison Spd 6 / Spd 5

check tool :Sonic Visualiser / Vamp plugin Tempo and Beat Tracker
https://vamp-plugins.org/plugin-doc/qm-vamp-plugins.html

Spd 6 ... BPM 126,05
Spd 5 ... BPM 152,00

formula;

Case Spd =5

Song BPM 152 = 60 / x
x = 0.3947368421052632
The speed of the pattern is 395 ms

T = tempo ... BPM `value` on Milkytracker
M = ticks / row
timepertick = 2500 / T;
timeperrow = 2500 / T * M;

timepertick = 2500 / 125
timepertick = 20 ms

timeperrow = 2500 / 125 * 5;
timeperrow = 100 ms

395ms = timeperrow * 16/4

2

MilkyTracker Support / Re: FAQ: BPM/SPD/Rows/Ticks etc

« on: April 17, 2019, 05:41:03 »

I read this topic.

Then, is the following correct?


The BPM value in MILKYTRACKER is not necessarily "BPM of how many quarter notes come out per minute" generally referred to, but it is a property value that controls the speed of one line of the pattern.

When setting the BPM of the actual song as 110 in Milkytracker, it is necessary to adjust the speed of one line by the BPM value or tick / row. In other words, the BPM value is determined as a parameter to achieve the target BPM.

Find the BPM value as T.

As the pattern speed x
Song BPM 110 = 60 / x
0.545 = x
The speed of the pattern is 545 ms

M = ticks / row
timepertick = 2500 / T;
timeperrow = 2500 / T * M;

In the case of 16 Rows in one measure, Beat = 4th note is 16/4, so
545 ms = timeperrow * 16/4
136.25 = timeperrow
136.25 = 2500 / T * M

Let M be 5
T = 91.7431193

If BPM value is 91.7431193, BPM of Song will be 110.

And if one pattern consists of 13 Rows, then Beat = 1/4 note becomes 13/4
545 ms = timeperrow * 13/4
167.692308 = timeperrow
T 7 74.5412843

If BPM value is 74.5412843, BPM of Song will be 110.