wha wha?

May 24, 2006 at 10:56am

wha wha?

hi

i_thought_ i remembred a “jimmies” patch which was a pretty
convincing wha-wha…

but whan i look at my jimmies folder, there is no such a thing

so what does it take to make a whawha?? reson~, a bandpass biquad~,
or something more??

(a wha is a band pass, right?? or a resonant low-pass??)

or does anyone have a good exemple??

many thanks

kasper

Kasper T. Toeplitz
noise, composition, bass, computer

http://www.sleazeArt.com

#26134
May 24, 2006 at 11:18am

It should be enough a good bandpass filter (biquad~ could be good),
whose center frequency is controlled by something that sweeps around
the hot spot, related to the input signal and the desided output
sound. Center frequency is what is controlled traditionally by a pedal
or an envelope follower in case of autowha. The Q factor of the filter
afftect the sound, so it can be also controlled in someway or set for
desired result…
I remember a wha effect built into an external but I don’t have now my
max computer here to check.

#77693
May 24, 2006 at 12:38pm

It’s in the ISPW Compatibility Library (& called wahwah~). The point
was that you could modulate the central frequency with a signal (which
you couldn’t with the other filters in the jimmies).

Ben

#77694
May 24, 2006 at 1:34pm

ok, thanks

so yes, i have it installed on an old, OS9, mac. I looked at the
ircam CD’s (from 2005), and , even if on their cover they claim the
ispw lib is included (mac os X.3.9 and up), it’s not…

looked at the ircam web site and the ispw is there only as OS9
version, which does not want to be unstuffed on my osX (no classic)
system…

on a mac which still has the 2 systems (2 different partitions, no
“classic emulation” i tried the whawha~ in system 9 – it works

I then copied the ispw lib in the osX max folder (externals) and was
surprised to see than the whawha~ seems to work (it is not an
abstraction – at least cliking on it you can not open it)

so the questions now are

1/ was the ispw lib ported to osX?? if so, where can i found it???
2/ how come os9 object (audio object) works on osX??

many thanks

kasper

Kasper T. Toeplitz
noise, composition, bass, computer

http://www.sleazeArt.com

#77695
May 24, 2006 at 2:16pm

#77696
May 24, 2006 at 2:39pm

wawah~ was an object on the ispw, which is virtually identical to
reson~ in msp. I think the compatibility lib version was simply an
abstraction with reson~ inside it! reson~ will be a lot easier to use
in this sort of context than biquad~.

Best

L

Lawrence Casserley – lawrence@lcasserley.co.uk
Lawrence Electronic Operations – http://www.lcasserley.co.uk
Colourscape Music Festivals – http://www.colourscape.org.uk

#77697
May 24, 2006 at 3:55pm

>wawah~ was an object on the ispw, which is virtually identical to
>reson~ in msp. I think the compatibility lib version was simply an
>abstraction with reson~ inside it! reson~ will be a lot easier to
>use in this sort of context than biquad~.

I tried all kind of versions – biquad~, 2 biquads in cascade, reson~,
wahwah, resonators~ ….

giving the same parameters (or almost the same, as i am not sure what
would be the same Q for biquad and reson…) i got very different
sounds..

reson~ does not sound the same as wahwah – reson is much “clearer” –
i was “deceived” by biquad~ (too polite) and 2 biquads did not had a
sound i liked….

actually the nicest results ( to my ears!!) were obtained either with
reson, or with fffb~ – building 5 parallel whas, slightly (and
randomly) detuned…

bujt then i have 5 real whawhas (and 20 distortion pedals) in my studio!!

all the best

kasper

Kasper T. Toeplitz
noise, composition, bass, computer

http://www.sleazeArt.com

#77698
May 24, 2006 at 4:44pm

>
>
> bujt then i have 5 real whawhas (and 20 distortion pedals) in my studio!!
So what do you break our b***s ?! ;-O
>
> all the best
>
> kasper

#77699
May 24, 2006 at 4:58pm

>>bujt then i have 5 real whawhas (and 20 distortion pedals) in my studio!!
>So what do you break our b***s ?! ;-O
>>
>>

’cause i want a “virtual” wha !!! – much easier to carry around, and
then it can go lower/higher etc than the real one

and the one i just did with a fffb~ 5 – is something you can NOT do
in the real world (i already did couple 2 real whawhas, physically,
but 5…. un less you have super huge feet !!! ;-)

best

kasper

#77700
May 25, 2006 at 3:51am

Quote: Kasper T Toeplitz wrote on Wed, 24 May 2006 15:34
—————————————————-
> 2/ how come os9 object (audio object) works on osX??

Objects that only talk to Max/MSP and don’t talk directly to the Operating System have always been happy to run unchanged on both OS X and pre-X.

For those who aren’t programmers, it may be non-obvious why, when, and which externals needed to be updated or not. In a pinch, try it and if it works, it works (corollary: si qu’il ne marche pas, alors il ne marche pas). I guess, off-hand, that about 10% of existing externals were able to run without change across OS 9/OS X. And about 0% of externals run without out change across OS X/XP -)

Best — Peter

#77701
May 25, 2006 at 7:36am

while a wha is quite simple in principle, the hardest part is tweaking
filter parameters in order to make it sound the way you want. It is
hard of course to emulate analog warmth in digital domain…especially
if wha madness of electric M Davis is the aesthetic reference as it
was for me.. I have been enough satisfied by using 2 biquad filters
but in parallel non in cascade configuration, operating in partially
overlapped frequency ranges.
The aim was trying to get me an electro harmonix bassballs-ish thing
but, like you say,
> much easier to carry around, and
> then it can go lower/higher etc than the real one

ciao
d.

#77702
May 25, 2006 at 9:02am

On 25 May 2006, at 04:51, Peter Castine wrote:

> Objects that only talk to Max/MSP and don’t talk directly to the
> Operating System have always been happy to run unchanged on both OS
> X and pre-X.

Mostly: as I recall, the linkage to MathLib broke some objects.

Besides, an object can be both happy and wrong: the thread-safety
conditions are more rigorous in OS X, even though old code will run.

– N.

nick rothwell — composition, systems, performance — http://
http://www.cassiel.com

#77703
Jan 29, 2007 at 10:34pm

I’m using biquad~ with a signal connected to the 5th inlet in order
to control b1 at signal rate. It turns out that this value is applied
later (and therefor not synchronous to the signal coming in to the
left inlet of biquad~). After some experiments I figured out that the
delay of b1 corresponds to the signal vector size. I haven’t tested
if the same problem occurs with the other inlets of biquad~. It would
be a pleasure if this problem can be solved!

best,

Edwin
macbook 10.4.8
maxmsp 4.6.2

#77704

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