Jonathan,

I demand that you do a patch that records the first 8 bars from “And your bird can sing” from beatle`s revolver album, sampling @ < 1 hz in more than 12 hours of  that loop in the speaker with a mic close to it.

Salutti :)

Lucarda. 

> Date: Sun, 5 Jun 2016 13:15:27 -0700
> From: msp@ucsd.edu
> To: jancsika@yahoo.com
> CC: pd-list@lists.iem.at
> Subject: Re: [PD] high-frequency birdsong
>
> Strange kinda bird you've got there...
>
> If you use a standard 44K1 audio interface, everything above Nyquist gets
> filtered out before conversion. You could in principle use a 1GhZ-bandwidth
> sample/hold clocked at 44K1 - this would effectively alias everything down
> to audio frequencies (folded over 1e9/44100 times). At that point, IF the
> S/H is clocked at a rate that's incummensurable withth erepetition rate of
> the signal you've got, you can then reassemble a non-uniformly sampled
> collection of points, leaving no space between them greater than 1/(2E9)
> seconds - then the sampling theorem says that you can theoretically
> reconstruct trhe original signal.
>
> Don't forget a 1gHz low-pass filter, else if the bird hits higher pitches
> they will fold over :)
>
> M
>
> On Sun, Jun 05, 2016 at 04:47:51PM +0000, Jonathan Wilkes via Pd-list wrote:
> > Hi list,Suppose a bird sings a song in a frequency range around 1gHz. (Yes, "g"Hz)
> >
> > The song the bird sings is always exactly the same.
> > The bird repeats its song several million times over the course
> > of an hour.
> > If I record at a sampling rate of 44.1kHz below the tree in which the bird is perched,
> > for a duration of one hour, would I be able to recreate the bird's song?
> > -Jonathan
> >
>
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