problems with META events and double notes

MIOS programming (Assembler)
1

my new midibox is up and running, but i have some ptoblem in customizing meta event to get double notes to control sonar.

i know that there are some preset already done, but i’d lokle to change them to adapt to my setup.

in particular, i want to send a double note event like

G10 (sonar remote trigger) + f#10 (remote command, play, for example)

i opened the meta.inc file, and found this handler:

(i omit the non-interesting parts…)

MB64E_META_Handler_08

	;; META Event: "F0 0x" (enc) or "F0 0x 36 @OnOff" (Button - 36 may vary and is the second MIDI note)
	;; x = 08 to 0F

in the previous, it seems that if i vary the “36” i can send different second control notes ok, let’s go ahead…

MB64E_META_Handler_DoubleNoteOn
	;; NOTE ON
	movlw	0x90 ; send 0x90 (Note On Header, channel 0)
	call	MIOS_MIDI_TxBufferPut
	movlw	0x7f ; send 0x7f (g10) -- cakewalk needs this as MIDI Remote indicator
	call	MIOS_MIDI_TxBufferPut
	movlw	0x7f ; send 0x7F (velocity)
	call	MIOS_MIDI_TxBufferPut

in the previous i send the first note, the g10 that i need to start the remote control of sonar.

movf	MIDI_EVNT1, W	; send content of second byte (08-0f)
	call	MIOS_MIDI_TxBufferPut
	movlw	0x7f ; send 0x7F (velocity)
	call	MIOS_MIDI_TxBufferPut

	rgoto	MB64E_META_Handler_DoubleNoteEnd

for what i understand, here it load the second byte of the meta event (the 08-0f) and send it as a midi control note.

BUT…

in the beginning it seemed that i could change the note with the “36” in the meta event…

remember?

“F0 0x 36 @OnOff” (Button - 36 may vary and is the second MIDI note)

instead, the routine sends the 08 as the midi note!!! (the byte that labels thi particular meta handler!)

how can i send the “36” as the note number midi event?!?

i tried in a lot of different manners, but without success…

help! :slight_smile:

2

What did you try exactly? Did you also try to send MIDI_EVNT_VALUE instead of MIDI_EVNT1?

Best Regards, Thorsten.

3

thanks!

now it works and it’s good

i use MIDI_EVNT_VALUE  as you said and the first note on event is correctly sent.

this is sufficient for the sonar automatin.

but a minor problem is that the note is not turned off…

the note off routine (when i have also used MIDI_EVNT_VALUE ) sends a note off to C0 (i suppose it send the midi note number 0x00). … why??

anyway, this is not so important! it’0s just to understand a little more!

4

MIDI_EVNT_VALUE is zero when the button is depressed, therefore it’s normaly only useful for velocity or CC values

There are 16*128 = 2048 other possible meta events if you wouldn’t rely on this variable

Best Regards, Thorsten.