Re: Logarithmic Interpolation


Rune Allnor wrote:
Michel Rouzic skrev:
Rune Allnor wrote:
Sounds like a nice project.

Rune

Nope. Turns out that it really sucks. Sounds just like the way Adobe
Audition does it.

What happened?

you know, that's just not what I wanted, that was just as bad as every
other pitch shifting I ever heard before. the worse is that now that
i've done that my first approach (that I imagined before I even started
DSP...) which was to use a log-scaled spectrogram doesn't seem that
ridiculous anymore (althought totally unsuitable for what I want to do)

The thing blew up? If so, that's life. Not every idea turns out to be
a good one. In 15 years I have had two - 2 - ideas dealing with DSP
that could not be shot down withing a couple of hours. Neither
was useful.

Don't worry, I wasn't making myself too many illusions about my idea.
It only made me realize better how that pitch shifting problem was far
from as simple as I could imagine. So far I treated the problem quite
lightly, like, I just wanted to give it a try, but if I want to go any
further with that problem I'll have to pay attention to any approach
that has done before.

You did something right but somebody else had already done it?
Been there, done that. Five or 10 times or so, during the last 15
years. While it may be frustrating at first, you at least came up
with a solution that some smart guy already came up with and that
has stood the test of time.

Yeah, but I'm still wondering how such an ugly sounding algorithm like
that could stand the test of time.

Don't underestimate that. The people who dominated the electronics
and DSP 25 years ago, where the same generation that put people
on the moon using more slide rules than transistors for design
and computations.

While people in earlier times might not have had access to 1 GB
RAM and matlab, they had their wits about them.

1 GB RAM and matlab? Only 768 MB for me and homemade C functions ;-)

.

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