In praise of the .alp format

Discussion of music production, audio, equipment and any related topics, either with or without Ableton Live
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Pitch Black
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In praise of the .alp format

Post by Pitch Black » Sat May 18, 2019 11:00 pm

Just sayin’... I just made up a stems package of a track for remixing: 24 tracks of stereo 24bit stems for 6mins. The resulting project was 2.3GB, when packed as an .alp it came down to 330MB!!

Live must do some very clever ignoring of silent sections, followed by its lossless compression.

Impressive! 8)
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pottering
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Re: In praise of the .alp format

Post by pottering » Sun May 19, 2019 12:53 am

Thanks for the info, it will come handy when weighing what to do when archiving old projects.

Pitch Black
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Re: In praise of the .alp format

Post by Pitch Black » Sun May 19, 2019 1:56 am

:D I think the amount of space saving is quite material-dependent, I’ve had compressed sizes well under half the original size before, but this is a new “personal best”. This was a “song of two halves” with half the tracks having no content in the the first half and the others no content in the 2nd. All those long silences seem to have no penalty at all on the compressed file. I’d never seen such a great saving before.
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fishmonkey
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Re: In praise of the .alp format

Post by fishmonkey » Sun May 19, 2019 3:37 am

long silences should compress really well. high redundancy. coming up next... millions of zeroes!
badbrainz wrote: I'm a drummer, so I'm already at an intellectual disadvantage here

Pitch Black
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Re: In praise of the .alp format

Post by Pitch Black » Sun May 19, 2019 5:11 am

Image

mihai
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Re: In praise of the .alp format

Post by mihai » Sun May 19, 2019 5:13 pm

Wow, that's a huge difference. I'm sure it wouldn't compress as well but 7zip is a nice alternative.

ark
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Re: In praise of the .alp format

Post by ark » Mon May 20, 2019 2:38 pm

An alp file is really an xml file run through gzip.

chrk
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Re: In praise of the .alp format

Post by chrk » Mon May 20, 2019 3:44 pm

ark wrote:
Mon May 20, 2019 2:38 pm
An alp file is really an xml file run through gzip.
The .als (Live Set) is the xml file. The .alp packs the whole project folder structure, including collected samples. THOSE are the storage hogs.

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