Guitar-to-MIDI project article

[deadastronaut]

I'm still tweaking it, but yeah you have to play pretty cleanly...

many thanks to potul (mat) for this too..

going  by the guy on here who did a demo, it tracks pretty damn well.....hopefully mine will in a bit..

http://www.youtube.com/watch?v=SsWi7GWlPD8

no oboes here...just lovely  cubase/reason synths..


@mat:  any advancements on this since you built it?

[potul]

Not really.

I tried without success to implement a better tracking algorithm with the intention to track bends. And I put it in a box (finally!). That's all.

[Hemmel]

I have a IVL PitchRider 7000 MKii at home...
Never use it since I can manage ok on my keyboard controller...

I guess I'll try to sell the PitchRider...

[deadastronaut]

i added a 'hold' function to it...just switching between 330k and a 2.2M on the input..

[Jdansti]

Here's some polyphonic for ya'...

I looked up the Roland GR-1 and it uses a special pickup, so it's not true guitar to MIDI, but its still pretty cool!

[deadastronaut]

mid converter done...

[Jdansti]

Nicely done!

Just curious if there was a reason that you went "lid up" on this one?

[deadastronaut]

ha ha well spotted, yes it was an old unused/undrilled pulsewah etch...bit of recycling

ideal for the job.

[Jdansti]

Nothing wrong with that! 

[potul]

Can you explain what the "hold" function does and how it was implemented?

[deadastronaut]

hi mat, 

i put a switch  where  R2 (680k) is...(though i'm using 470k)

and it switches between the 470k, and a 2.2M...the 2.2M blasts the input, and triggers 'sustained' notes..hands free. (depending on sound)

though its being a bit temperamental with me at the mo...i'm sure you know how it is....i'll sort it later..

here ya go a pic paints a thousand words eh...

https://dl.dropboxusercontent.com/u/7464107/MIDIG2MODDED.jpg

rob.

[potul]

Oh, I get it. interesting solution. It would be much more reliable to implement this via software in the PIC though.

[deadastronaut]

lol..interesting bodge more like ...

yeah i guess it would, but i have no experience whatsoever in pic's,+  programming etc.....thats a whole new ball game for me.

[davent]

Here's some polyphonic for ya'...

I looked up the Roland GR-1 and it uses a special pickup, so it's not true guitar to MIDI, but its still pretty cool!

OK way off topic but i googled Jeff Baxter to basically see if he was still alive, what has he been up to in recent years... Wikipedia and this gig sorta popped up unexpectedly...  More recently, he has been working as a defense consultant and chairs a Congressional Advisory Board on missile defense.

http://en.wikipedia.org/wiki/Jeff_Baxter

Back to topic.
dave

[Jdansti]

Here's some polyphonic for ya'...

I looked up the Roland GR-1 and it uses a special pickup, so it's not true guitar to MIDI, but its still pretty cool!

OK way off topic but i googled Jeff Baxter to basically see if he was still alive, what has he been up to in recent years... Wikipedia and this gig sorta popped up unexpectedly...  More recently, he has been working as a defense consultant and chairs a Congressional Advisory Board on missile defense.

http://en.wikipedia.org/wiki/Jeff_Baxter

Back to topic.
dave

He's got a video out there where he talks about how the defense consulting came about.

[deadastronaut]

midi guitar controlled drones...

[kooroshi60]

i added a 'hold' function to it...just switching between 330k and a 2.2M on the input..

Hello Rob. Can you tell me if it has any effect on tracking efficency? Does it change the sensing threshold? And would you please upload the firmware you are using currently? Thank you

[deadastronaut]

@kooro: 

i didn't programme the chip...another guy did, and sent me it...

as for the hold mod, it doesn't quite work as expected....


if i were you i would just buy the sonuus v2...looks pretty cool , and reasonably priced too.

[Diodac]

Hi all
I'm new here
Post G2M interested me for a long time. I built several MIDI pitch tracker but do not work best with the guitar.
I built G2M and it is almost perfect for playing a guitar solo.

I'm not a the best PIC programmer and I have a question which suggests to change the source code to G2M worked with a bass guitar ?

I think the change table " MIDI NOTE DATA TABLE " according to the bass guitar but I'm not quite sure what values ​​to enter in the table. Because originally not reads the lowest tones of 6 threshold the down! My dream is that my bass playing all sounds
Is it enough to change the tables or something else I need to change in the code? I beg help make a change

Other issues of G2M -Polyphonic
I think of polyphonic interface, need to do four interfaces, one for each string and pick-up polyphonic make . MIDI merge used to sum all MIDI OUT to one channel. Maybe a good option ? What they think ?

Second idea - Read slides
Mate Stephen Hobley built a very good pitch tracker for theremin.
http://www.stephenhobley.com/blog/2011/01/24/pitch-and-volume-tracking-midi-interface-for-the-theremin/

I built it out of original plans from him, works well for guitar, reads the slides and and changes tone with floyd rose bridge! so good for freatless guitar but there is one f. problem ... controller not sends note-off message I want it overcome but far without results. Stephen does not help, I wrote to him. If they want, I share via email some schematics and code. The project was really interesting. We can expand and rebuild our guitar needs.

The third idea - Modulation,

I decided the G2M add of a system that will recognize changes in the modulation of sound when the tension of the strings, etc. and  send messages, for example Rezonance or Cut-of. Need to use another uC and circuitry. I have an idea and I'm going to do this.


Someone asked about the G2M original code, please be here:
ASM - https://drive.google.com/file/d/0B54jdI_xntNTeHBnNEltZG5FTjQ/edit?usp=sharing
HEX - https://drive.google.com/file/d/0B54jdI_xntNTUThZWXI3NWNid3M/edit?usp=sharing

Best regards for all
Arkadius from Sydney

[deadastronaut]

hi welcome..

i have no idea with code etc, but i would be interested in a new improved version of this...its great fun.