AudioLeak
(4 votes, average: 4.00 out of 5)
An audio file Leq analyzer. Leq (Long-Term Equivalent Level) is the averaged (RMS) loudness level for a recording.
AudioLeak allows quickly (over 200 times realtime on newer Macs) and easily previewing the relative (perceived) playback volume of sound / music files without having to listen to them. Various compressed and uncompressed audio formats are supported, of any sample rate and file size. Shows Average unweighted RMS, A-Weighted RMS and Peak values
What does this mean to you, the audio / music enthusiast? One use for this software is to quickly analyze music recordings to determine relative loudness levels, without having to listen to them. A DJ might use it to preview relative playback levels.
Of course, professionals in the above industries may also find AudioLeak to be a useful tool…
For more information on this subject, simply search the Internet for “Leq audio” or “A Weighting audio” (omit quotes).
Here is a link to a comprehensive technical document on the subject:
http://www.dolby.com/assets/pdf/tech_library/54_Moviestooloud.pdf (247 clicks)
AudioLeak’s A-Weighting filter algorithm has been carefully tuned for 44.1 and 48 kHz audio. Including filters optimized for additional sample rates is unnecessary, because the Leq measurement doesn’t apply to signals outside the audio band (ultrasonic signals sampled at over 48 kHz).
Audio with sample rates other than 44.1 or 48 kHz will be resampled internally to the nearest whole multiple of 44.1 or 48 kHz before applying the A-Weighting filter. This can be disabled for analyzing RMS and Peak Levels at the file’s native sample rate; however, the A-Weighted measurement will be omitted. Note: peak Levels for resampled audio may not accurately reflect the content of the native sample rate audio (because of the filtering of fast transients during resampling). This has a negligible effect on RMS measurements.
AudioLeak will analyze compressed or uncompressed mono or stereo audio files – of any sample rate, and any length.
Tested formats: AIFF, AIFC, WAVE, Sound Designer II, MP3, M4A, ALE (Apple Lossless Encoding). AudioLeak uses translation services provided by Mac OS X, so various other formats might be recognized, as well.
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http://www.channld.com/dwnldpg.html (580 clicks)
Popularity: 4%