Tonal Plexus Li'l Improv

YouTube via AaronAndrewHunt

"Just a little single-line meandering microtonal Tonal Plexus improv using an Edirol SD-20 tone module (piano patch). http://www.h-pi.com"

Tonal Plexus with Edirol SD-20


Tonal Plexus - some examples


"Some random examples shown on a green TPX4s Tonal Plexus. (Note: sound quality is not very good on this video). http://www.h-pi.com"

Tonal Plexus Layout

YouTube via AaronAndrewHunt

"Letter names for key regions are shown, followed by diatonic and chromatic halfsteps subdividing the fifth. Find out more about the Tonal Plexus at http://www.h-pi.com"

Sigur Rós Glósóli played on a Tonal Plexus

YouTube via AaronAndrewHunt

"This is my rendition of Glósóli by Sigur Rós, from the 2005 album Takk. It really doesn't take 211 keys in an octave to play this, but it's nice to be able to play it in Just Intonation, with different pitches depending on the voice leading. This is a single take. I tried to capture some of the grandeur of the original, though that is really impossible, and I hope you won't think my effort is too lame ... get the real thing here - IMHO possibly the best music video ever made: http://www.youtube.com/watch?v=Zr_MJA... ... more about the Tonal Plexus at http://www.h-pi.com"

RedTPX6s 2011

YouTube Uploaded by AaronAndrewHunt on Jul 15, 2011

Total Plexus TPX6s. See the Tonal Plexus label below for more.

TONAL PLEXUS - TPX6s Live Control 1

YouTube via AaronAndrewHunt. via Nusonica

"The new TPX6s ($3109) from H-Pi Instruments has a matrix-style interface for controlling global synthesizer parameters, and a joystick option for controlling global pitch bend. This is a demonstration of those features, although I forgot to demonstrate one of the parameter sets, and the wide variety of settings options is not really shown here in this one example modification of an organ patch. Find out more at http://www.h-pi.com"

U-PLEX Tonal Plexus keyboard

YouTube via AaronAndrewHunt
"Here I show one of the new U-PLEX keyboards, fist just playing through the editor (TPXE) and then routing out from there to Native Instruments KONTAKT. U-PLEX are the new more affordable USB-only line of Tonal Plexus keyboards. Find out more at www.h-pi.com"

Lament

YouTube via AaronAndrewHunt

"The forbidden wavy narrow line - whether you spell it Do Re Me Re or La Ti Do Ti, in my experience it's some kind of archetype, and I use it here as a ground bass. There is a little otherwise diatonic melody which features a falling microtonal glissando, and then I'm obviously improvising the rest, for admittedly too long, and it might be boring, so I added some visual effects for interest. The sound is coming from the TPX2s internal synth. Find out more about TPX keyboards at http://www.h-pi.com"

Tonal Plexus V7 Tritones in Just Intonation

YouTube via AaronAndrewHunt — April 21, 2010 —

"Dominant 7th chords contain a diminished 5th between the 3rd and 7th. This is often called a tritone, although tritones are, strictly speaking, always augmented 4ths, not diminished 5ths. The misnomer is indicative of the way pitches are named enharmonically in 12ET. In Just Intonation, a diminished 5th will never be an augmented 4th. In 12ET, two dominant chords can share the same pitches between their 3rds and 7ths, swapping roles of those pitches between the chords. This can't happen in Just Intonation. This video shows how in JI either the 3rd or 7th can be used as a common tone, but not both. NOTE: the captions in this video introduced blips into the audio for some reason and I couldn't fix it; sorry. The keyboard in this video belongs to the Berklee school of music in Boston, MA, and is used there by David Fiuczynski and his students. Find out more about the Tonal Plexus at www.h-pi.com"

Tonal Plexus Editor (TPXE) Part 1

YouTube via AaronAndrewHunt

"Download TPXE for free (Mac and Windows) at http://www.h-pi.com/downloa..."

3-Octave U-PLEX Improv

YouTube Uploaded by AaronAndrewHunt on Sep 9, 2011

"A little improv on a custom-order 3-Octave U-PLEX Tonal Plexus microtonal keyboard (they are usually 2 octaves, and usually white keyboards). For more info, visit www.h-pi.com"

Just Intonation on the Commodore 64 - Divinium Mysterium

Published on Nov 21, 2013 AaronAndrewHunt·41 videos

"Showing musical programming of Divinium Mysterium in Just Intonation in 3 voices on the Commodore 64 to my friend Jon Kostal in Chicago, in 2001."

Tonal Plexus - 31ET / Bohlen-Pierce / Partch

YouTube via AaronAndrewHunt

"This shows a custom tuning table built in TPXE, with 4 octaves of 31ET, 2 octaves of the Bohlen-Pierce 13th root of 3 scale (in two different patterns), and Harry Partch's 43 tone JI scale (also in two different patterns). The tuning software is here: http://www.h-pi.com/TPXEsoftware.html and the tuning file used is http://www.h-pi.com/tpxfiles/31ET-BP-... in the scale archive at http://www.h-pi.com/cgi-bin/filearchi..."

J.S. Bach C Major Prelude & Fugue, Book 1, BWV 846

YouTube via AaronAndrewHunt

"Here's a rendition of Bach's C Major Prelude and Fugue (opening) played in Just Intonation on a Tonal Plexus keyboard. Obviously, Bach did not write this music to be played in Just Intonation (the "Well Tempered" part of "Well Tempered Klavier" has a specific meaning for tuning), so this is an experimental performance which uses pure 3rds and 5ths, natural 7ths in dominant chords, and harmonics reaching the 17-Limit in diminished chords. In several places, a common tone can be heard to 'bend' from one chord to the next (usually in ii-V progressions) where a pitch has to move by a septimal comma; the pitch is changing in real time by JND steps. This is a single take. I played only the opening of the fugue, very slowly ; ) This is for two reasons. First, so my fingers will behave and play the right keys, and second, so the sounds of Just Intonation can be savored a bit. Find out more about the Tonal Plexus at http://www.h-pi.com"

The Goose Microtonal Wind Controller

Published on Nov 21, 2013 AaronAndrewHunt·41 videos

"This video is from 2001. I'm showing The Goose to my friend Jon Kostal in Chicago. The Goose is a microtonal wind controller I invented that is based on my H-Chroma trichromatic number theory http://www.h-pi.com/theory/huntsystem... The Goose plays in 47-Limit combinatorial Just Intonation, capable of over 38,000 pitches per octave."

Playlist:
The Goose, part 1
The Goose - part 2, Jon Kostal tries it out
The Goose - part 3, check out the chord buttons
The Goose - part 4, Tucker Robison tries it out
The Goose - part 5, Doug DiBianco tries it out
The Goose - part 6, Ethnomusicology, Birdsong, and Amazing Grace
The Goose - part 7, Jon Kostal improvises

Lassus: Ave Regina

YouTube via AaronAndrewHunt

"This excerpt by Lassus presents a puzzle for tuning with pure intervals, where the closing chord should be the same as the opening chord, but if strict theoretical rules are followed the closing chord will fall about a quartertone lower than the opening chord. The passage is played twice here on a 2 octave Tonal Plexus keyboard, showing how this pitch shifting occurs. In the first performance, only pure intervals are used, which lead to the quartertone lower closing chord. The drop in pitch at 2 junctures should be clearly audible. The second time the quartertone distance between the opening and closing chord is distributed throughout the passage at almost every change in harmony, so that the final chord ends up being the same as the opening chord instead of lower. This means that common tones and pitches normally held as suspensions (which should not change) actually do change in the second example, shifting up by 1 JND at almost every change of harmony. This is usually called 'adaptive' tuning. I limited the adaptive shifts to 1 JND, which is the distance between 1 key vertically and the next in the default tuning of 205ET which is used here. The adapting could be done in slightly different ways to end up with the desired outcome. I personally like the small lift in pitch which is felt with every change in harmony in the adaptive version. This lifting of pitch gives a feeling that the piece is constantly rising when in fact it is just compensating for the naturally falling pitch. I like the subtle changes. A different example could show the opposite, where small lowing of pitch over time could compensate for rising pitch, and a longer passage could mix both things. Just a note here - I have changed some registers of pitches in this example because the bass notes would not all fit on a 2 octave keyboard. Also, I admit that I did not consult a score for this; I only listened to a tuning example made by Kalle Aho and figured out the passage by ear at the keyboard. The basic voice leading should be correct. Thanks to Kalle for posting the example which gave me the idea to do this. And, thank you for watching and listening (and reading). Check out the Tonal Plexus at http://www.h-pi.com"

Tonal Plexus TPX6s

YouTube via AaronAndrewHunt. sent my way via fischek.

"Here is a sketch using 2 main ideas. The first is a motive including the 11th and 13th harmonics, and the second is a sequence using natural 7ths. Sorry, the camera angle is not the greatest as it hides what my right hand is doing. The sound is 019 ChrchOrgn from the internal synth, with reverb setting on 07 (delay), all max values. This was a single take. See more at http://www.h-pi.com"

Tonal Plexus Editor (TPXE) Part 2 and 3

Tonal Plexus Editor (TPXE) Part 2

YouTube via AaronAndrewHunt

"... how to use the software to create Region Maps on the keyboard. Get the software, free for Mac and Windows: http://www.h-pi.com/TPXEsof..."

Tonal Plexus Editor (TPXE) Part 3


Part 1 here.
Be sure to see these previous posts featuring for some examples of the Tonal Plexus in use.

TONAL PLEXUS TPX4s

YouTube via AaronAndrewHunt

"I was messing around with different tunings of a Gm7 chord and came up with this. The sounds are coming from the TPX internal synth, except for the drums. Check out the Tonal Plexus at http://www.h-pi.com"

TBX1 demo 1

YouTube via AaronAndrewHunt

"This is a demonstration of the H-Pi Instruments Tuning Box TBX1 ($299), a device which retunes standard MIDI keyboards so that any key can play any pitch you want. In this demo, a Yamaha PSR-310 ($149) plays an arpeggio throughout, sending MIDI notes of a C-Major chord, which you hear at the beginning going through the box in bypass mode (no retuning). That chord then gets retuned in 15 different ways, and I noodle around (not much keyboard skill shown here) over the arpeggio in each tuning. Each of the 15 presets stores a tuning and a bank / patch change. The box stores up to 128 tunings in 4 layers = 512 tunings, each 128 notes. Check it out here: http://www.h-pi.com/TBX1intro.html"