Well the way I see it, the educational value could be enough to make it worthwhile, if it's not useful musically.
To do it I would probably use Pure Data; in which case I wouldn't know how to use pvs data, only Pd's native fft format, which treats blocks of FFT data as audio signals. Not sure if a Pd graph could be automatically set to logarithmic, but perhaps non-real-time conversions could be made.
Now that I think of it, couldn't the pvs data be written to a Csound table, and this table converted logarithmically to another table? I don't have much experience viewing graphs with Csound, though; perhaps I'd send that data out to Pd if I had to throw something together.
Now that I looked, I realize pvs uses frequency/amplitude bins, not amplitude/phase.
So I'll have to give it some thought.
-Chuckk
On 10/11/07,
Tim Mortimer <timmortimer@d2.net.au> wrote:
How so Chuck?
I know we have things like SPEAR et al (our original poster may also find
SPEAR of use...)
but by a similar implication, converting PVOC analysis data to a directly
viewable & editable format is something i have thought might be handy /
useful at some point... (although thinking out loud, i'm not sure what it
would offer that SPEAR & /or SDIF style resynthesis does not exactly.. in
terms of
*ease of use in performing meaningful adjustments on data before
resynthesis, or
* arbitrarily creating "spectra" for synthesis based on non analysis / real
world models.....
I have some related thoughts & issues about ATS i was going to ask , but
i'll put them in a separate post I think immediately to follow this one...
As far as the original post goes, I also thought at some point i heard
something about the possibility of a more exponentially spaced analysis that
was achievable by focussing different window sizes on different frequency
bands... idle speculation though on my part, but someone might actually
enlighten us to what that is or might be... (?)
Chuckk Hubbard wrote:
>
> I don't know if this fits your needs, but it would be fairly simple to
> produce a logarithmic *graph* of the linear frequency analysis produced by
> the pvs opcodes. But the data itself would still be spaced linearly. If
> that doesn't help, I don't know of anything.
>
> -Chuckk
>
>
>
>
--
View this message in context: http://www.nabble.com/exponentially-spaced-spectral-transformation--tf4594662.html#a13152002
Sent from the Csound - General mailing list archive at Nabble.com.
--
Send bugs reports to this list.
To unsubscribe, send email to
csound-unsubscribe@lists.bath.ac.uk
--
http://www.badmuthahubbard.com