Forums > MaxMSP

MICROTUNING AUDIO


September 17, 2013 | 10:50 am

can anyone help me if there is anything i can use to build an audio microtuner in max? i would like to play my guitar in alternate tuning systems, and the FM8 midi microtuner is pretty good (http://dubsahara.com/wp-content/uploads/2010/08/HIJAZ-MIDI.jpg), but it’s not good for audio singnals, and i don’t want to use midi pickup..
thanks for your help!

September 18, 2013 | 2:00 am

Hi
alternate tunings require splitting the guitar strings into discrete audio streams so they can be re-tuned individually, otherwise you would simply be transposing the entire range en masse. This is not trivial and would require either a hexaphonic or midi pickup. To process the monophonic audio signal purely in Max would be even trickier and certainly beyond me.

http://www.graphtech.com/products/product-categories/electronics

http://rickygraham.com/2011/05/12/septar-board-beta-kits-june-2011/

Brendan

September 18, 2013 | 2:20 am

no, it’s not needed to split the guitar strings, it would be a simple monophonic pitch shifter, that would shift out of the equal temperament system

September 18, 2013 | 3:31 am

Hi
you will need to split the guitar strings to achieve what you are currently describing. If you simply wish to pitch shift a monophonic melody line (regardless of the instrument) then you should not refer to "alternate tunings". This is confusing. Monophonic pitch shifting is easy. Is this what you require?

https://www.youtube.com/watch?v=uyzY_ZP54pA

Brendan

September 18, 2013 | 4:06 am

why not? it would be simply a melody line in for example just intonation, and that’s not ET

September 18, 2013 | 4:42 am

Ok, now it’s clear, you wish to re-tune individual pitches to reflect alternative monophonic tunings.

This isn’t my area, but there have been several threads here on the use of alternative tuning systems; have you tried the search dialog above top right? "Equal temperament" might be a good query to start with, and see where it leads you.

HTH

Brendan

September 18, 2013 | 11:55 am

There is also ol.autotalent~ for auto tune effects. I forget if you can adjust the tunings individually.

September 19, 2013 | 1:49 pm

you basically only need to translate the note values to frequencies for one octave, then you can * 0.5 and *2 the rest.

September 20, 2013 | 7:04 am

Your approach to retune a string only works nice if you are significantly louder than the original sound of the guitar…;-)
ol-autotune~ would tune you to an equal-tempered scale. But out of the description of Thomas Baran (http://tombaran.info/autotalent.html). You can try to patch it together with fiddle~ and some pitch shifting…

And you should definitely look into the Magic Microtuner:

http://cycling74.com/forums/topic/max-magic-microtuner-version-2-0-released/

I would probably tune the open strings to harmonic thirds relative to your fundamental (the interval which is lowest compared to equal temperament) and bend all other pitches by ear… I know, its hard with chords…;-) Or get a fretless guitar… For sure it will sound better…

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Forums > MaxMSP