Encoding Yamaha Tempo

Question

MIDI Target Manufacturer(s): Yamaha

Response to a FB question on encoding tempo sysex for Yamaha Tyros 5.

Best as I can tell, the Tyros uses Yamaha tempo encoding of microseconds per quarter note (MSPQ).  Then BPM = 60,000,000 / MSPQ.

This site shows how to calculate the MSPQ values in midi hex: https://www.psrtutorial.com/forum/index.php/topic,48303.msg378327.html?PHPSESSID=fpnktbvik6nsjjf0nsped33n96#msg378327

But, since MDP2 needs the named ticks value in decimal, we can skip all the conversion nonsense.  We just need MSPQ = 60,000,000 / BPM

Make a spreadsheet of the tempo values desired like follows:

BPM    MSPQ
100    600000
110    545454
120    500000
130    461538
140    428571
etc...

We want to be able to select by BPM, so we need to add a third column with midi value first, space, display value

BPM    MSPQ    Load
100    600000    600000 100
110    545454    545454 110
120    500000    500000 120
130    461538    461538 130
140    428571    428571 140

We need a new knob, type sysex.  I do not have the Tyros sysex format, but suppose it is F0 43 7E 01 t4 t3 t2 t1 F7.

Enter 43 7E 01 V as the sysex format (leave out leading F0, trailing F7), select four bit V, no check sum.

Select named ticks, select edit text, clear all data and paste the "Load" column above, less the header row.  Note: ensure thousands separators are not used - named ticks will not recognize them.  

If everything is entered correctly, the data values for 120 should show as 00 1E 42 20.

Downloads: 457
Yamaha Tempo.xlsx.zip
Downloads: 457

Comments

Isn't MIDI supposed to be dead by now? 1983 sysex still rocking, thanks for figuring this one out, JK!

Answer 1

Michael Baumgärtel - i do not believe the Tyros uses the four bit Roland encoding, but if you want to try it, here is a spreadsheet that will calculate the correct MDP2 input decimal value to generate a four digit four bit (aka Roland) encoding for named ticks.

Value to be encoded -> MDP2 named ticks input decimal value -> MDP2 Sysex output four bit encoded value.

Example:

4095 (0FFFh) -> 247695 -> 00 0F 0F 0F

The highest value you can encode in four digits is 65536, which equates to a minimum BPM of 915, which contributes to the belief this is not the correct encoding.

Downloads: 467
Four Bit Encoding for MDP2.xlsx.zip
Downloads: 467

Answer 2

Michael Baumgärtel - i do not believe the Tyros uses the four bit Roland encoding, but if you want to try it, here is a spreadsheet that will calculate the correct MDP2 input decimal value to generate a four digit four bit (aka Roland) encoding for named ticks.

Value to be encoded -> MDP2 named ticks input decimal value -> MDP2 Sysex output four bit encoded value.

Example:

4095 (0FFFh) -> 247695 -> 00 0F 0F 0F

The highest value you can encode in four digits is 65536, which equates to a minimum BPM of 915, which contributes to the belief this is not the correct encoding.

Downloads: 467
Four Bit Encoding for MDP2.xlsx.zip
Downloads: 467