Re: Ultrasonics - being more specific


Subject: Re: Ultrasonics - being more specific
From: miriam clinton (iriXx) (iriXx@iriXx.org)
Date: Wed Oct 06 2004 - 18:29:50 EDT


Coryn Smethurst wrote:

>Will check out audiosculpt, I had thought it was limited to 44.1kHz, but
>having never used it. Would transposition be by FFT?
>
>
yes - its an FFT app.

best,

Miriam.

>crrs
>
>on 5/10/04 9:23, miriam clinton (iriXx) at iriXx@iriXx.org wrote:
>
>
>
>>yep, hardware required... but for software, i had excellent results with
>>AudioSculpt.
>>
>>mC~
>>
>>Philippe-Aubert Gauthier wrote:
>>
>>
>>
>>>Also take a look at your microphone (some are designed for ultrasonics) and
>>>preamp specifications.
>>>
>>>David Greisinger have demonstrated that some sound cards pretending to record
>>>ŕ
>>>96kHz was just in fact interpolating between lower sample rate analog/digital
>>>conversion. I think that when he called to sale office to say something like
>>>"Hello I am Mister Griesinger (you know, the Lexicon reverb, that's me!) and
>>>your sound card is not making 96kHz but its writen on the package" he then
>>>get
>>>such an answer "Oh yeah, we know but the electronics chips can make it record
>>>at 96kHz but its not implemented" or "Yeah, but we filter everything above
>>>22kHz before ADC." I don't remember the sound card name, but it was a popular
>>>and common one!
>>>
>>>So : we should not even trust the specs!
>>>
>>>Selon Ryan Torchia <torchia@buffalo.edu>:
>>>
>>>
>>>
>>>
>>>
>>>>Max/MSP will do it in realtime too, and wouldn't require any additional
>>>>hardware, although you'd probably need specialized hardware to record
>>>>18-48kHz.
>>>>--Ryan.
>>>>
>>>>Coryn Smethurst wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Thanks for this, but I was hoping someone knew of a program which didn't
>>>>>need additional hardware, so I could use it out and about with my Apple
>>>>>Powerbook - my fault for not being more specific. Does anyone know of a
>>>>>program which would fulfill my requirements?
>>>>>
>>>>>thanks as ever
>>>>>
>>>>>crrs
>>>>>
>>>>>on 3/10/04 14:29, David Mooney at moko@city-net.com wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>Kyma could do this in realtime.
>>>>>>
>>>>>>Coryn Smethurst wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Does anyone know of a program which will filter out frequencies below
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>about
>>>>
>>>>
>>>>
>>>>
>>>>>>>18khz then transpose frequencies above this threshold into the audible
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>range
>>>>
>>>>
>>>>
>>>>
>>>>>>>preferably real-ish time? The software would obviously have to cope with
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>a
>>>>
>>>>
>>>>
>>>>
>>>>>>>96khz sampling rate. I'm a Macintosh user ...
>>>>>>>
>>>>>>>Any help appreciated.
>>>>>>>
>>>>>>>crrs
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>%====================================================================%
>>>% Philippe-Aubert Gauthier, B.Ing, M.Sc. %
>>>% Étudiant au doctorat en reproduction de champs acoustiques %
>>>% %
>>>% GAUS (Groupe d'Acoustique et de vibrations de l'Université de %
>>>% [ Sherbrooke) %
>>>% CIRMMT (Centre for Interdisciplinary research in Music, Media %
>>>% [ and Technology) %
>>>% %
>>>% http://www3.sympatico.ca/philippe_aubert_gauthier/acoustics.html %
>>>%====================================================================%
>>>
>>>
>>>
>>>
>>>
>>>
>
>
>
>
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-- 
99% of aliens prefer Earth
--Eminem

www.iriXx.org www.copyleftmedia.org.uk



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