LASTAR : a batch audio processor for loudness adjustment and file splitting
Logiciel Automatisé Simple de Traitement Audio Rapide
LASTAR is a batch (non-interactive) audio processor for loudness adjustment and file splitting of a batch of audio recordings, using audio transparent maximizer.
At the opposite of usual available softwares, loudness normalization is done on signal power, which leads to a louder and more homogeneous result than a usual "peak" normalization, in particular on live recordings.
Its purposes are :
to split and normalize digitized analog tapes or vinyls,
to split and normalize live recordings from microphones (ex ZOOM H2 recordings),
fast and homogeneous normalization of a group of files (compilation for instance),
loudness and dynamic reduction for listening in a noisy environment (car...)
and so on...
This software aims to be very fast and easy to use : the most efficient computing techniques have been implemented, and there are very few parameters to set (most of them are automatically adjusted by analyzing the file).
It embeds :
- an automatic RMS normalizer,
- an Automatic Gain Controller (compressor)
- a 3 bands semi-parametric equalizer
- a file splitter
- a noise gate
- preset management
- a preview function.
For interactive audio edition, please use instead an audio editor like Audacity.
If you need some help or request new feature, please use this forum.
- This software is a freeware available under gpl licence.
- Available on Windows XP 32 bits and above, should be easily portable to Linux
wav or mp3 input,
wav or mp3 output
- support of id3 tags V1 & V2
Design to process large files (several Go) and full directory trees
Automatic file analysis to set up the best parameters
RMS Amplifier with fast lookahead limiter to prevent clipping
Left/right channel automated balancing
- 3 bands semi-parametric equalizer
- real time pre-listening function
Transparent and fast 3 bands processing (using FIR implemented by multi-threaded FFT convolution)
Automated amplifier gain adjustment and noise estimation for file splitting
Smooth automatic gain control (AGC) to compress dynamic without "pumping" effect
- Output noise gate
English or French GUI
- Comes with a simple user guide