On 07 Aug 2008, at 00:53, raja wrote: > > It's a pretty detailed process to try and explain and there are > many ways to do this but since I haven't done this, all I could > tell you is that you might be able to do this either by taking a > sample of a violin, etc. looping a small section of it in order to > achieve the timbre of the violin and then applying that to a > shepard-tone patch somehow or perhaps even try it within some kind > of FFT algorithm that would also achieve shepard-tone-like-pitch- > shifting. Maybe someone else here who has already created this will > answer your post, though, you never know... > > It is definitely possible, though. Best of luck. >

hm... while it is certainly possible to use a sound with any combination of partials to feed the glissando machine, the auditory illusion of the ever rising/falling glissando will only work with a sound whose partials are spaced apart by the same interval - preferably an octave (partials 1, 2, 4, 8, 16 etc.).

vb

Nicolette schrieb: > Could someone help me? I'm really a newbie with Max/Msp.

Max expertise alone wouldn't help in this case. The shepard tone uses a specific overtone structure and mixture to get you into this illusion. The original is sliding a fundamental and its overtones while fading in the lower and fading out the higher partials. As soon the highest partial is silent, you fade it in again on the lower end... On option is to record a real slide over two octaves of the given instrument (hard to play for the sax...) and create at least three copies, which have to be in an exact overtone relationship with the others. Main problem would be to play a steady slide, which has exactly the same interval/time over the complete 2 octaves. The other option is to create the move with a gizmo~ pitch shift, that would allow to do an exact move, but will introduce some artefacts to the sound...

Good luck and post the result...

-- Stefan Tiedje------------x------- --_____-----------|-------------- --(_|_ ----|-----|-----()------- -- _|_)----|-----()-------------- ----------()--------www.ccmix.com

Mmmm..thanks for the comments and advises, but I think I gone skip this idea. My knowledge of Max/MSP is not so far jet. But if someone want's to work out this "problem"/idea, be my guest :).

Grz,

Nicolette

You might have success with a cross-fade in the frequency domain. I believe this was essentially the technique used to recreate the castrato voice in Farinelli.

I made some plugins that do this. There is a shepard tone ring modulator, flanger, phasor and pitch shifter:

oli

nice soft, thanks for the link

maybe a convolution of instrument sound and Shepard tone can be a simple workaround

check this : http://pan-etc.net/res/dev/glissando.zip it's not perfect but works well...

i disagree with the idea that the effect of the continiously rising tone would work only with a certain overtone structure/timbre.

it is almost as cool with a saxophone sample or even a drumloop.

and it also works when the distance between the tones is 1.377 octaves, it is a just a bit a different effect than in the "original" (wtf.)

oh, did i mention that 110.modular has a shepard generator which outputs fade in/fade out data for each of the stages?

-110

.

and where's is 110.modular ? thx.

I'm afraid the link to Glissando.zip seems to be broken.

Kai

it's ok now. sorry.

it is somewhere below here --> •

it is somewhere below here --> •

yep, i saw lately. 'was tired...