Re: Ultrasonics - being more specific


Subject: Re: Ultrasonics - being more specific
From: Coryn Smethurst (corynrrsmethurst@tiscali.co.uk)
Date: Wed Oct 06 2004 - 17:24:35 EDT


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

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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