Fades
From Audacity Development Manual
Revision as of 13:41, 14 November 2012 by PeterSampson (talk | contribs) (added to the note - fade-outs longer than fade-ins)
Linear Fades
These basic fades apply a fade to the selected audio, so that the amplitude changes gradually from the original amplitude at the start of the selection down to silence at the end of the selection. The shape of the fade is linear. The rapidity of the fade-out depends entirely on the length of the selection it is applied to.
Fade Out
- Accessed by:
Fade In
- Accessed by:
Cross Fades
Despite the names these effects do not do an automatic cross-fade between two tracks or clips. Instead they apply a curve that is different from the one used by the Fade Out effect. The curve used is one that will result in equal volume throughout the fade once the faded in and faded out regions are mixed.
Cross Fade Out
- Accessed by:
Cross Fade In
- Accessed by:
Fade In/Out tips:
- By repeating a fade in, the audio will remain quiet for longer then rise more rapidly to the original level. Similarly, repeating a fade out will cause the level to initially drop more rapidly then tail off at a lower level. As with other effects, the fade may be repeated as required by pressing CTRL + R.
- For a more customizable logarithmic fade in or fade out, use the Envelope Tool on Tools Toolbar.</p>
- When cross-fading, fade in the first two-thirds of the overlapping audio that is beginning, and fade out the last two-thirds of the overlapping audio that is coming to an end. Two-thirds is a guideline rather than a rule, but helps to keep the level of audio constant through the fade. Alternatively, cross-fade using the two Cross Fade effects, selecting the entire overlap.
- Typically fade-outs are applied over a longer period (up to ten seconds) whereas typical fade-ins are much shorter.
Musical Fades
These fades apply a more musical fade to the selected audio, giving a more pleasing (more "professional") sounding result.
- Pro Fade Out uses a mirrored S-curve or 1/2 period cosine for the volume and a linear ramp for the lowpass filter (from 22050 Hz down to 100 Hz). Basically that means that the high frequencies are sustained for longer and the low freqquencies are faded quicker (this is a standard used in the recording industry on many current CDs and LPs).
Pro Fade Out
- Accessed by: provided you have installed it.
Pro Fade In
- Accessed by: provided you have installed it.
