Hi all,

I made the Scala file for s=1.

-----%<----------Cut here ---------%< ------
! CHaS.scl
!
CHaS s=1
12
!
100.038318440222
200.076636880444
300.114955320666
400.153273760888
500.19159220111
600.229910641332
700.268229081554
800.306547521776
900.344865961998
1000.38318440222
1100.42150284244
1200.45982128266

-----%<----------Cut here ---------%< ------

I'm impressed by the increase of harmonic resonance you get with this temperament.

Don't forget to set octave stretching to 1.00 otherwise it won't work !

Nikos

Please, do you know what's the argument to choose those steps for ET?

Thank you!

It was a real pleasure for me today coming back to this thread.

I have some good news about Chas and I would like to share them with you and... not only that.

Since 2011, I could do three biennial seminars at the ITEMM (Le Mans - France), for beginners, advanced students and for professionals. Likely the feedback I got were very encouraging.

In 2012 I could post a recording, piano and orchestra (Rachmaninoff - Concerto n. 3 - second half), for people who believe that an orchestra goes with a different tuning. I dedicate this posting to Sigasa, as he recorded an excerpt, after having fixed a new tuning settings on his keyboard.

https://www.youtube.com/watch?v=SQ9BYCbJOfs 

In August 2015, Haye Hinrichsen, a physics Professor from the University of Würzburg, published a paper where he compares the 12th-root-of-two ET with modern ET's, pure fifths, pure 12ths and Chas, basing on entropy. His work seems to confirm the value of "stretched octaves" also for "harmonic" tones, meaning with no-iH tones. Here is the link:

http://www.scielo.br/scielo.php?script=...6000100410

Last June I was enabled to do a seminar in Toronto, invited by the Piano Tuners Canadian Association (CAPT) at their annual convention. It went well, the colleagues' comments have reinforced my determination towards more sharing.

Today I came back here, as the Canadian colleague and friend Ernest Unrau was asking me a question about PianoTeq users. I re-read our posts and was touched again by your openness, your understanding, by your words about my family and all the efforts you made to overcome any language barrier and some technicalities.

I want to say thank you, again, for all that and for trusting my words. Hope you are still enjoying tuning, hope to hear from you.

Kind regards,

Alfredo

Edit: I have noticed that the link (above this post) to the "CHAS Tuning mp3 - 2011 - Live recording on Fazioli 278" is not working on my laptop, the following works:

https://www.youtube.com/watch?v=0V80n4RfB0w

Thank you very much for your words and comments.

Jake, I'm sorry, I do not know what type of mic was used; it was small and it was positioned half way the lengh of the piano, 30 cm. away and about 40 cm. high above the soundboard. I shall try to find out more.

I know which 30 seconds you are referring to...it's 60 seconds at the end, for me too that's beautiful (thanks the pianist); sounds seem to generate and re-generate and happily melt one into the other, yet they enter myself and leave a deep trace, long like the tail of a comet.

I do have more "romantic" recordings and I'll be happy to share them. Only, I need to do some editing (with a friend of mine) because they are too long.

Please...never give up ;-) chas@chas.it

Best wishes,

Alfredo

Just like Jake, I also like the first recording very much. It is so very different to equal temperament. It has a classic, romantic, old recording type sound to it, but not without the strong hint of modernity inherant in the tuning.

Lovely,

Warm regards,

Chris

Hello...I've made available two recordings; one made by a tech, using a single mic and a pc,

CHAS Tuning mp3 - 2011 - Live recording on Fazioli 278
http://myfreefilehosting.com/f/07c3ca3905_6.32MB

...
Best wishes,

Alfredo

Alfredo! Always good to hear from you. I had almost given up on hearing from you again.

That first recording is gorgeous, particularly in the slow last 30 seconds or so. Do you know the details of the recording? The type of mic, for example, and where it was positioned?

It is good to hear that CHas is getting the attention that it deserves. I hope you will post more recordings. I never tire of them.

I'm finally on holyday and I'm glad to be able to great Jake, Chris, Gilles and all PIANOTEQ friends.

Only two events of some relevance (concerning Chas) have taken place since my last posting: a conference in Messina,

http://www.informasicilia.it/2010/04/19...a-cultura/

and an article by the MATEpristem group (Prof. Chiriano - Bocconi University - Milan)

http://matematica.unibocconi.it/articol...pianoforte

More recently I've made available two recordings; one made by a tech, using a single mic and a pc,

CHAS Tuning mp3 - 2011 - Live recording on Fazioli 278
http://myfreefilehosting.com/f/07c3ca3905_6.32MB

the second one, I recorded it with my pocket camera,

CHAS TEMPERAMENT - 2010 - "Rina Sala Gallo" Piano International Competiton
http://www.youtube.com/watch?v=IPfq0CJ1gOg

I hope you like them.

Best wishes,

Alfredo

Will you be retuning the current preset by hand\ear in the Detune pane? We seem to have reached the point at which only you or Kamin can step in to set the unisons to 0 and complete your pretuning.

Now, we're left with "almost CHas." It's like bringing children to an ice-cream parlor and having them stand outside, peering through the window.

Thank you for your words, Chris, my parents are now well and they have very much appreciated your wishes.

Jake, about our last test you write:..."I agree about the tenths in the middle. Something's off there, and that's very bad, since it means the entire tuning is off, yes? The middle will need to be adjusted and then all of the notes on each side repitched to beat in the desired way?"...

For what I can hear, the tenths tend to be a little bit fast, the 12ths are surprisingly good. This may mean that the fifth partial goes high, and I wonder if this may be related with the iH settings.

In any case, when I say "a little bit" I really mean very little, and thinking to usual standard of tuning I'd say that all these tests are really flattering.

In Chas theory, beats represent the system's power, and indeed beats (i.e. differences) are proportioned as to interrelate all partials. Then, beats symmetries and synergies can determine the stability and the resonance of the sound whole. The "pure" concept is not referred to one interval anymore, be it the octave (first ET) or the fifths (Cordier's) or the 12ths (Stopper's), but it is referred to the coherence and congruence of the beats in relation to the scale frequencies values.

Preciselly these kind of tests are really "raw" and may allow us to make raw comparesons with other temperaments, using the same timings, energy and intervals. So, the relation between beats proportions and euphonicity may be ear-catching.

Best regards, Alfredo.

I have to manage a sudden trip, as my parents need help. I would kindly ask you all to wait a few days before we go more in depth.

Hope all goes well for your parents Alfredo. Give them our love and best wishes.

Chris

I was asking to "chain" the sequence: 12th-10th / 10th-12th / 12th-10 etc...just to retain the beat memory of the previous interval, both for constant 12ths and progressive 10ths. But I went trough it without problems. Thank you.

I have to manage a sudden trip, as my parents need help. I would kindly ask you all to wait a few days before we go more in depth.

From couple 5 to 42 the beat rates are very satisfactory, especially for 12ths. Maybe the 10ths get a little bit wide, i.e. nervous or...tense, and start getting difficult to evaluate at couple 33.

You too could have a go and let me know.

Best regards, Alfredo.

I mean that you do not want chromatic RBIs go fast, then slow, then fast again. You want them progressive, i.e. goin up the scale, the beat rate has to fasten proportionally and smoothly, so that each interval's beat rate makes sense (speed wise) with the previous interval and the next.

Regards, a.c.

http://www.forum-pianoteq.com/uploads.p...010ths.mp3

I hope I got this midi file right! If not, let me know where it is incorrect and I will fix it and post the ammended version complete with demo.

Regards

Chris

p.s. different piano in demo! M3 Close mic with first four mics enabled.

About the Chas 17ths test: we will remember that the first 6 intervals are too similar, so we may try to smooth the near bye higher rates and get back there with a better spread. What is important and very very positive is that the beat rate never inverts. This happens often and turnes many tunings in quasi-ET.

Chris, when ever you are ready we can go on with the next test.

I would check 10ths and 12ths together. Play 12th-3 sec. -pause 2 sec-10th-3 sec pause 2 sec - chromatic 10th and 12th - chromatic 12th and 10th up to D#7. Same energy all along, like before.

Your last recording is lovely, I realy like the amount of light and the lyric/singing power I ear. The last A# sounds flat to me.

Regards, a.c.