IVolume
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| iVolume | |
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 iVolume 2.0 under Mac OS X |
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| Developer: | Manfred Lippert |
|---|---|
| Latest release: | 2.0.2 / February 15, 2006 |
| OS: | Mac OS X |
| Use: | |
| License: | Shareware |
| Website: | http://www.mani.de/en/software/macosx/ivolume/ |
- The correct title of this article is iVolume. The initial letter is shown capitalized due to technical restrictions.
iVolume is an application for Mac OS X that implements Replay Gain for iTunes by updating the metadata that iTunes uses for Sound Check volume normalization.
- Sound Check background: If the iTunes Sound Check preference is activated, iTunes scans audio files to determine a per-track playback volume adjustment. Sound Check is designed so that the playback of multiple tracks with inherently varied relative volume levels will be at a consistent volume level.
iVolume aims to improve upon Sound Check by instead applying the Replay Gain algorithm. It replaces the settings computed by iTunes with new values computed via the Replay Gain algorithm. These volume adjustment settings supposedly result in perceptually more consistent playback volume levels than those produced by the iTunes algorithm.
While the CPU consumption of the algorithm employed by iTunes is nearly negligible, iVolume requires a few moments to process each track. This computation can be performed once and the results will be retained in the audio file metadata.
iVolume provides the capability to compute volume adjustments on a per-album basis, whereas iTunes does not. In this mode, iVolume scans all of the tracks in an album to determine the adjustment setting to apply and then it applies the same adjustment to each of the tracks in the album.
iVolume is incapable of processing protected files purchased via the iTunes Music Store and, for these files, only the built-in iTunes Sound Check volume adjustments can be used.
