sunyatasattva / overtones Goto Github PK

Show other fundamental frequency that have the selected frequency as their overtone

http://github.hubspot.com/odometer/docs/welcome/

• SHIFT + Arrow = increments of 10
• ALT + Arrow = increments of 0.1

Currently showing # and b instead of ♯ and♭

Add credits and Github link

Especially the + / - sign are not clear at those sizes. See attachment.

• Allow to record multiple sequences
• Allow to share them

Nothing works on current Safari as there is a Stack Overflow due to something in AudioContext patch.

https://github.com/meszaros-lajos-gyorgy/meszaros-lajos-gyorgy.github.io/blob/master/microtonal/monochord/js/webkit-audio-context-patch.js

Currently using a JSON, which is not the best solution, need to find the Maths to derive the notes.

Add help section with explanation and controls

High frequencies tend to sound very loud

We want to allow the user to preserve the sound details if needed. Perhaps a very subtle visual indicator is in order.

Theory

• https://ccrma.stanford.edu/~pdelac/154/m154paper.htm
• http://blogs.zynaptiq.com/bernsee/pitch-shifting-using-the-ft/
• http://www.fon.hum.uva.nl/paul/praat.html
• https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode
• http://recherche.ircam.fr/equipes/pcm/cheveign/pss/2002_JASA_YIN.pdf

Practice

• http://aubio.org/ (http://pyjs.org/Overview.html)
• https://github.com/jsantell/dancer.js
• https://github.com/cwilso/AudioRecorder/blob/master/js/main.js
• https://github.com/deibelman/dart-mic
• https://github.com/RobQuistNL/node-sndpeek
• https://github.com/mikolalysenko/detect-pitch
• https://github.com/leahciMic/pitch-detect

Skye writes:

Sharps and flats - where are the flats?
This is actually an important issue - and I am sorry that I didn't realize before - that you omitted the flats and use only sharps. That is not uncommon and the problem is of course that the regularities of the harmonic series are not really compatible with the tonal thinking on which naming of the notes is based.
If I were to give the keys of the piano names (without considering which key but considering c as a starting point) I would say
c-db-d-eb-e-f-f#-g-ab-a-bb-b-c'
Reason:
db is four fifths down from c, whereas c# would be seven fifths up (furthermore I have problems with the notion of a sharpened tonic)
eb is three fifths down from c, whereas d# would be nine fifths up.
f# or gb is six steps either up or down. I can explain later why I would pick f#
ab is five fifths down from c, whereas g# would be seven fifths up
bb is two fifths down from, whereas a# would be ten fifths up

A concrete example of 'disturbance':
Use 175 Hz as your starting point, close to a 12-tet F.
The 12th partial will be a C, which is fine, but the partial 13 is indicated as C#, and anyone with a little training in music theory will understand that it is not optimal to consider that partial an augmented fifth.
Another problem is when the fundamental is a '#-tone', in many cases the 11th partial will be indicated as a variant of a perfect fourth. Example: Fundamental 415 Hz, G#. Partial 11 will be indicated as C#. That is really not optimal.
One of my reasons to use f# instead of gb is based on modal structures, partly inspired from Indian music. I consider the fifth 'invariable' in a lattice in which each step (second, third, fourth, sixth and seventh) has a high and low version.

Given a frequency, play an interval of that frequency based on a tuning:

note.interval('G', '12-TET')

returns a note object for the fifth in 12 Equal Temperament.

Can implement Danielou's list as something like:

note.interval('CL+', 'Danielou') // => 16/15

Allow to hear overtone produced from the human voice and to see how to produce them in the mouth. Perhaps adding vowel diagrams or better mouth position svg.

Given a tuning system and a reference note, find another note.

playNote('G4', '12-TET', 440) // => 392Hz

Probably 12-TET should be default and surely 440 should.

Allow the user to set sequences of intervals in order to create his own exercises and practice on the "intervals jumps" he prefers.

Also: a sort of "record" button for a sequence (maybe avoiding giving the chance to set the tempo for each note to keep it simple, and "excercise-oriented"). I'm liking this! Connected to it, maybe it would be cool to have an "ear training" feature where you can test if you guess the intervals smile emoticon

One suggestion:

2/1 perfect octave
3/2 perfect fifth
4/3 perfect fourth
5/4 small major third
6/5 large minor third
7/6 sub minor third
8/7 super major second
9/8 major second
10/9 small major second
11/10 sub major second or large middle second/large neutral second
12/11 middle second or neutral second
13/12 small middle second or small neutral second
14/13 supra minor second or smaller middle second
15/14 larger minor second
16/15 large minor second
11/8 super fourth
13/8 small middle sixth/small neutral sixth
7/4 sub minor seventh
15/8 small major seventh

This only happens on the ones without inner circles

When we get into composite numbers, I think it would be clearer to have them split the "other" way, e.g. to have 6 split into 3 and then 2 on the outside, showing that it's the same "shape" as the 3 identity, but that it's an octave higher, so each piece is just split up into two. Ditto 10=5 x 2, 12=3 x 2 x 2, 14=7 x 2. This means they'd keep the same shape going all the way down the gold axes, so one could easily recognise they were like "copies of the same thing"
When we get to composite numbers not involving two, then I guess you have the biggest factor on the inside, and the smallest on the outside. So 9 is fine how it is, but 15 might be better as 5 and then 3.

See: http://www.html5rocks.com/en/tutorials/audio/scheduling/

Right clicking should bring up a opoup with this option

Input precise number

Add support for playing overtones through keyboard.

Could be interesting to consider also playing fundamentals through keyboard, but it is maybe outside of the scope of this project.

Latest version of Chrome broke hover animation by setting the transform-box to the default SVG origin.

Hi, I really enjoy the tool you've made here!

I have a humble request to make and that is to be able to play a sequence of overtone, like if you added numbers to each overtone you would be able to play them back by something like: writing in a box "1 2 3 2 1" and those overtone would be played.

That would be a great great way to figuring out melodies to sing with overtones or just to listen to.

Example: This around 220 hz

1 2 4 8 16 8 4 2 1 7 13 7 1 7 13 7 1 3 6 3 1 2 1