[Sidefx-houdini-list] spectrum node questions

Sam Cuttriss teanau at gmail.com
Sun Mar 1 13:07:21 EST 2015


in case this this post went missing during the email blackout.
i am getting back to this project and am still not very confident with the
spectrum node.
i mostly crash.

_sam

On Fri, Dec 19, 2014 at 12:31 PM, Sam Cuttriss <teanau at gmail.com> wrote:

> im crashing all the time trying to use the spectrum node. (h13 indie, 64,
> win7)
>
>
> Ive animated a curve in the frequency domain and intend to output a sound
> signal in the time domain using the spectrum node. ( "From frequency
> spectrum"  terminology is odd to me does that mean from the frequency
> domain? )
>
> im very new to the app, so most my assumptions may be wrong.
>
> my sample rate is 44100 ( standard audio that ought to accomodate my
> hearing range )
> i have an animated frequency magnitude curve between sample 0 - 1837.5 (
> one frame  of samples) chan_m amplitude 0 - 1, it is just sweeping across
> the frequency range.
> i have a constant of 1 in the phase channel  chan_p
>
> im telling the spectrum node to sample absolute between 0 - 1837.5 samples
> and output in the time domain.
>
> but nothing is coming out the way i would expect.
>
>    - the waveform does not look like it is correctly informed by the
>    frequency magnitude curve.
>    - even though im telling the waveform to start at sample 0 its
>    starting at frame 1 so im not certain its sampling the correct data.
>    - i need the spectrum node to continue sampling the first frame worth
>    of samples and outputting a waveform rather than stopping after the first.
>
>
> i suspect its a fundamental misunderstanding of chops
> hopefully some of you can point me in the right direction.
>
> am i allowed to attach hiplc files to the list?
>
>
>
>
>
>
>
>



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