| Add
Silence: |
Adds a fixed amount of silence to the end of an
audio file. |
| Add
Tag Element: |
Enables a Tag element to
be always written, for example the Tag COMMENT (comment
field in ID3 Tag) could be set to your name. A list of
standard Tag Element names is presented when Add is clicked. |
| Channel
Move: |
The left or right channel
can be moved (left >> right, and right >> left).
NB source audio data has to be in stereo for this
to work. |
| DC
Offset: |
Audio data is usually
based around 0. This DSP function can shift the data up or
down by a fixed percentage of maximum. |
| Eden
Swap: |
Swaps bytes in an audio file, only of any use if
a file is taken from a Mac. |
| Invert: |
Inverts audio data (an
audio value of 100 will become -100), really only of any use
if two files are to be mixed together... |
| Maximum
Length: |
Sets the maximum length of
an audio file, for example a whole bunch of full tracks could
be converted with a maximum length of 30 seconds to generate
preview files. If the length of an audio piece is below the
maximum length then it is left untouched. |
| Minimum
Length: |
Set a minimum length, your audio file will be extended
as necessary with silence at the end. |
| Music
Removal: |
Removes music
from an audio piece, leaving just singing. This can only be
achieved because if the audio is mastered with the singer
singing into a mono microphone, and the rest of the music is
given a stereo effect between the left and right channels. The
voice can therefore be isolated. NB will only work on stereo
files in uncompressed (lossless state), not on mp3s. |
| Remove
Silence: |
Silence at the beginning
or end of a rendition can be removed, care must be taken to
select a silence detection threshold that can detect music,
whilst at the same time remove silence noise hiss (from
records especially). |
| Remove
Tag Element: |
A ID tag element can be
removed, this option will only work when 'Preserve ID Tags' is
used on the main option page. |
| Reverse: |
Takes an audio file and
reverses it, that is when it is next played it will play
backwards. |
| Sound
Grabber: |
A section of audio (either
from beginning or end) can be grabbed, for example grab 30
seconds worth of audio 40 seconds from the end. |
| Trim: |
A fixed amount can be
trimmed from either the beginning or the end. I use it for
those irritating audio tracks that seem to have 30 seconds of
irrelevant waffle / crowd cheering at the end - simply listen
to the track and make a note of where the waffle starts (say
30 seconds from end), and trim. |
| Voice
Removal: |
Karaoke time :) - remove the voice
from a recording, this is only possible if record where
the singers voice is positioned centrally between the left and
right speakers. NB will only work on stereo audio files
uncompressed (straight from CD), not on mp3 files. |
| Volume
Fade: |
Tracks can be faded in and
out with this DSP effect, enter the time in mill seconds
(seconds * 1000), so for example 6000 mSec will fade in over 6
seconds. |
| Volume
Normalize: |
In layman's terms volume
normalize will make the sound level of any quieter recordings
louder, so when played with other recordings they all sound
the same loudness. A desired volume (in percentage of maximum)
is set. Simple Normalization will scan through the audio
file, find the maximum value (it might be 60%) then it works
out how much it has to increase the volume to get it to the
desired value. Simple Normalization generally works well,
however there are a few situations which can throw it - if you
have a track that is only at 50% of max, except for a few bits
at the beginning (a pop from a record) that is 100%, then
simple normalize will leave the audio level untouched.
Adaptive Normalization can be used
to over come the problem of short loud sections, where the
rest of the track is quiet (perhaps a piece of classical
music, that is quiet until the drums at the end). Adaptive
Normalization is like having a friend constantly changing the
volume control of your stereo, turning it up and down as
required. The Window size is the length of track that is
scanned ahead to work out the volume level, a smaller window
will result in more volume twiddling.
NB Volume Normalize only makes tracks
louder - it will not make tracks quieter. |
| Volume
Quieten: |
Can quieten recordings by
either a fixed amount, or by doing the reverse of Volume
Normalize by calculating the maximum value then adjusting the
track to suit. Clip Any Values over Maximum simply leaves
the sound data untouched, except those that are over the
Maximum, they are clipped to maximum. |
| Write
Silence: |
Writes silence at any position. |
