bug or feature ? fade out fade in :?:

[whomper]

I would expect fade out to start at the average level at the left of the selected area and fade down to zero or perhaps the noise floor selected.

Ditto in reverse for fade in. Start in the noise and fade up to the average of the right side of the selected area.

What I got was a fade from the lowest modulation (or perhaps the noise) down to zero for the fade out. Ditto reverse for fade in.

Am I confused, or is this a bug in the way fade should work.

ps
i use xp pro sp2 on an inspiron 530 (dell)

[steve]

Fade Out starts at the original (unprocessed) volume level at the left end of the selection, and decreases to zero at the right end of the selection.
If you generate a tone from the "Generate" menu and apply a fade-out to it, the result should look like this:

firsttrack001.png (11.82 KiB) Viewed 1510 times

Fade In is the reverse.

[whomper]

Fade Out starts at the original (unprocessed) volume level at the left end of the selection, and decreases to zero at the right end of the selection.
If you generate a tone from the "Generate" menu and apply a fade-out to it, the result should look like this:

firsttrack001.png

Fade In is the reverse.

that is what i expected
did not get it

bug in the code - or user error?
what i got started down about 30 db and *curved* down to nothing
was not straight like the picture
did not start at the top like the picture shows

so
bug or user error?
if so - what does the user need to do differently?

[steve]

so
bug or user error?
if so - what does the user need to do differently?

To positively identify it as either one or the other you need to tell us how to reproduce the problem, so....

Exactly which operating system?
Exactly which version of Audacity (Help menu > About Audacity)
Step-by-step method to reproduce (starting: "(1) Open a new Audacity project ...")

[Storer]

Whomper, I think what you are seeing is the difference between the dB display and the linear display. On the track menu at the left of each track you can choose which you want: linear, which runs from -1 to +1 on the vertical scale (called Waveform) or you may choose Waveform (dB) which shows the volume in decibels, with 0 at the top, and decreasing to something like 48, 64, or 96, which you can select from Menu->Preferences->Interface. Fade-in and Fade-out are linear on the default Waveform display, but much like you describe on the Waveform (dB) display.
Dave

[whomper]

Whomper, I think what you are seeing is the difference between the dB display and the linear display. On the track menu at the left of each track you can choose which you want: linear, which runs from -1 to +1 on the vertical scale (called Waveform) or you may choose Waveform (dB) which shows the volume in decibels, with 0 at the top, and decreasing to something like 48, 64, or 96, which you can select from Menu->Preferences->Interface. Fade-in and Fade-out are linear on the default Waveform display, but much like you describe on the Waveform (dB) display.
Dave

OK
I have to get smarter.
not sure how to change scale yet.

was looking at the track.
selected portion to fade.
faded.
and it looked wrong wrong wrong.

it started (from memory) about 18 db below the average peaks.
then faded to zero -- well below the low levels.
and it curved in an arc going downwards.

now if the fade used a different scale then I can see that.
but the problem was it started at the wrong level.
could be user error. but i would say flaw in the design if that is so.
do I have to zoom way in and pick a peak value to start fading on?
that is not user friendly.
what it should do IMHO is take the average highs of the selection and fade down from there -- at least to the lows -- down to noise level better -- down to zero just fine -- its the start point that is an issue.

current beta version
win xp pro sp2

[steve]

When using the "Fade Out" effect from the Effects menu, the start point is an "amplification of x1" - or to put it another way - the start of the fade is identical to the original unprocessed sound. The end point is silence.
If you are seeing something different then I think that you will need to post a screen shot and a step by step method of how to produce the effect to illustrate what you are seeing.