MIDI Examples

Bob Lawrence (VE1RLL)

Midi Input:
https://forums.parallax.com/discussion/125994

Overview:
http://nagasm.suac.net/ASL/Propeller/20080312/MIDIinPropeller.htm
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MIDI out Schematic:
https://forums.parallax.com/discussion/118144

MIDI Input and Output Schematics:
https://forums.parallax.com/discussion/98059/propeller-midi-circuit-plz
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Synthesizer object with General MIDI sound

https://forums.parallax.com/discussion/111867

MIDI Expander:
http://forums.parallax.com/attachment.php?attachmentid=60054&d=1239629974

MIDI Expander Lightshow (zip)
http://forums.parallax.com/attachment.php?attachmentid=60228&d=1240218022
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Sythesizer:
https://forums.parallax.com/discussion/126780

Sick Day Synthesizer:
https://forums.parallax.com/discussion/109220

Rainbow synthesizer: polyphonic, multitimbral wavetable synthesis:
https://forums.parallax.com/discussion/109498
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Propeller Multimedia Board(MIDI Interface):
http://syso.name/wiki/index.php/Propeller_Multimedia_Board#The_MIDI-Interface
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MIDI to LED:

https://forums.parallax.com/discussion/124019
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Completed Propeller based MIDI projects

Computerized Pyrotechnic Firing System:
http://www.parallax.com/tabid/716/Default.aspx
https://web.archive.org/web/20130528053707/http://www.parallax.com/tabid/716/default.aspx

MIDIomatic:
http://www.parallax.com/tabid/711/Default.aspx
https://web.archive.org/web/20130208101131/http://www.parallax.com/tabid/711/Default.aspx
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A few Objects to get started with:

MIDI in:
https://obex.parallax.com/obex/midi_in/

Full Duplex Serial
https://obex.parallax.com/obex/full-duplex-serial/
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Example Code:

' Transmit MIDI. Sends two notes to an external sound module.

CON

_clkmode = xtal1 + pll16x
_xinfreq = 6_000_000 ' Set it for whatever Xtal you have. I used a 6Mhz Xtal for the test.


midi_tx_pin = 16 'use any pin number you have available)
midi_rx_pin = 17 ' Not required to transmit. Use any pin you have available

OBJ

midi: "FullDuplexSerial"

PUB sendNote
midi.start(midi_rx_pin, midi_tx_pin, %0000, 31250) '%0000 = mode, Baud Rate = 31250
Repeat


midi.tx($90) ' Note On , (also %10010000)
Midi.tx(60) ' Note = C
Midi.tx(55) ' Velocity = 55

Waitcnt(clkfreq + cnt ) 'Delay

midi.tx($90) ' Note On , (Also %10010000)
Midi.tx(66) ' Note = C
Midi.tx(0) ' Velocity = 0


midi.tx($90) 'Note On
Midi.tx(79) 'Note = G
Midi.tx(55) 'Velocity = 0

Waitcnt(clkfreq + cnt )

midi.tx($90) 'Note On
Midi.tx(79) 'Note = G
Midi.tx(0) 'Velocity = 0

'I copied the pasted the code into the Prop IDE and except for aligning everything, it worked fine.

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MIDI Coming To 12Blocks:
https://forums.parallax.com/discussion/118236
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Prop MIDI on YouTube:
http://www.youtube.com/watch?v=OyBgHSvVgUY

garylake

None of these examples gave me any insight on sending Midi (not midi files but the notes I tell it to send) out to a synth. I just want to know what data is sent and how it is sent. Say I want channel=1, note=c, velocity=64 to be sent out of P17 to the midi out Din 5.

SER.start(0, 17, 0, 31250)
SER.tx(144)
SER.tx(60)
SER.tx(64)

That doesn't do anything.

Anyone know how to do this?

Bob Lawrence (VE1RLL)

I tested and posted the code required to do a simple 2 note send.

garylake wrote: »

None of these examples gave me any insight on sending Midi (not midi files but the notes I tell it to send) out to a synth. I just want to know what data is sent and how it is sent. Say I want channel=1, note=c, velocity=64 to be sent out of P17 to the midi out Din 5.

SER.start(0, 17, 0, 31250)
SER.tx(144)
SER.tx(60)
SER.tx(64)

That doesn't do anything.

Anyone know how to do this?