[sdiy] A crazy idea..

[Jeff Farr]

I was thinking about 8 bands per audio channel, starting around 16k on
downward in octaves. However, I realize this will take a steep BP curve to
decode so that there is enough headroom between bands for good resolution,
I'm not sure what kinds of slope can be easily achieved but I imagine having
12 or 24db of space for each octave may not be high enough for a good
resolution 'decode'.

On 10/5/05, Harry Bissell Jr <harrybissell at prodigy.net> wrote:
>
> > On 10/4/05, Eric Honour <autophage at gmail.com> wrote:
> > >
> > > What about using a channel as one half of a
> > vocoder?
> > >
> > > IE, one audio channel carries twenty different
> > CV's by having twenty
> > > different (harmonically unrelated) tones of
> > varying amplitude... much like
> > > the 'ghosting' technique previously mentioned, but
> > not actually containing
> > > usable audio (it'd just sound like a crappy
> > dissonant chord) - then using a
> > > series of very narrow bandpass filters into a
> > bunch of envelope followers?
>
> You don't need 'harmonically unrelated' tones if you
> are using sine waves (which have no harmonics). The
> limiting factor would be how steep you can make the
> bandpass filters... and how stable the recording
> method is (wow, flutter, speed changes ?)
>
> The lower audio tones will STILL be much slower to
> recover. I'd think that twenty tones would be really
> pushing the limits of what you could do with practical
> bandpass filters...
>
> H^) harry
>
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