Re: Ultrasonics - being more specific


Subject: Re: Ultrasonics - being more specific
From: miriam clinton (iriXx) (iriXx@iriXx.org)
Date: Tue Oct 05 2004 - 04:23:32 EDT


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 %
>%====================================================================%
>
>
>
>

-- 
99% of aliens prefer Earth
--Eminem

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



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