Carl Karsten wrote:
> Eric Lavarde - ASB wrote:
> >Hi,
> >
> >>I have a mp3 podcast that was done with a crappy mike or something - it
> >>has a
> >>lot of high end twang - is there a filer I can use to make it "better" ?
> >>
> >>even just shifting the freq of everything down a bit would be a help. it
> >>is
> >>currently like listening to nails on a chalkboard.
> >If it's audio only, have you tried with audacity (GUI) or sox (command
> >line)?
>
> Nope. unless you think they will give me better results, I would rather
> use transcode - I already know a bit about it, and it seems like something
> worth learning more about.
Well, frankly, Transcode would do well to encapsulate sox as a
module, since it is "the right thing". Basically, sox contains the
accumulated knowlege of the free software audio processing
community.
As the sox webpage says:
The following effects can be applied to sound data (using sox):
* Channel averaging, duplication, and removal
* Band-pass filter
* Band-reject filter
* Compress and Expand (compand) the dynamic range of samples
* Chorus effect
* DCShift audio
* Deemphases filter
* Move soundstage to front of listener.
* Add an echo or sequence of echos
* Fade in or out
* Apply a flanger effect
* Apply a high-pass filter
* Apply a low-pass filter
* Display a list of loops in a file
* Add masking noise to a signal
* Multi-band Compander
* Pan sound between channels
* Apply a phaser effect
* Change the pitch of a sound file without affecting its speed.
* Change sampling rates using several different algorithms.
* Repeat audio data
* Apply a reverb effect
* Reverse sound samples (to search for Satanic messages :)
* Detect periods of silence and start and stop processing based on it
* Change the speed of samples being played (without affecting pitch)
* Display general stats on sound samples
* Stretch/shorten the duration of a sound file.
* Swap stereo channels
* Create sounds with a simple synthesizer
* Trim audio data from beginning and end of file.
* Add the world-famous Fender Vibro-Champ effect
* Adjust volume of samples.
