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PDF File Size Question (Read 2370 times)

Offline allthumbs

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PDF File Size Question
« on: April 19, 2007, 09:00:11 AM »
Nils

I've noticed that some of Piano Street's .pdf files are much larger in kb size than other comparable pdf's.

Case in point: I downloaded Ravel's Jeu d'eau from PS and I was going to replace the .pdf I had previous got from Sheet Music Archive.

I noticed a significant difference in size. PS file was 3182kb and SMA was only 752kb yet they appeared to be from the same source upon comparison.

The only reason I could think of was perhaps the .tiff file (or whatever file format is being used to make the .pdf) is very large, possible from using a higher scan resolution than the standard 300 dpi.

If this is not the case and PS has reworked a previous scan, why the size difference?

In general, I like the quality of PS sheets, but in situations like this, I've been keeping the sheets from other sources for my collection.

Your thoughts?


Cheers

allthumbs
Sauter Delta (185cm) polished ebony 'Lucy'
Serial # 118 562

Offline thalbergmad

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Re: PDF File Size Question
«Reply #1 on: April 19, 2007, 09:17:21 AM »
I think you are right about the resolution.

The pianostreets sheets print out perfectly.

Henrik is indeed a top quality scanner.

Thal
Curator/Director
Concerto Preservation Society

Offline nilsjohan

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Re: PDF File Size Question
«Reply #2 on: April 19, 2007, 10:23:30 AM »
We use 600 dpi for all scanned music which will make the file sizes four times larger than 300 dpi (as used elsewehere). This consequently costs four times more disk space, bandwidth, server resources as well as download time but sine we aim for highest possible quality we think it is worth it.
When viewing the files on a screen the difference is not clearly noticable until you enlarge the page by 800% but if you print out the sheet music the 600 dpi scans look much sharper and nicer, especially on a high quality laser printer.

In the case of the five recently added Ravel pieces (including Jeux d'eau) we had a slight problem when preparing the files which cause the resolution to be 300 dpi which the file size is still comparable to 600 dpi, but we decided to upload the pieces to the library anyway and correct the resolution later. I will see if we can have them fixed later today.

Offline nilsjohan

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Re: PDF File Size Question
«Reply #3 on: April 19, 2007, 09:02:10 PM »
The five corrected Ravel files are now uploaded to the library.

Take a look at the new Jeux d'eau attached and compare it to the 300 dpi versions in the previous post. If you enlarge in Adobe Reader to 800% or print them out you will see a clear difference (even if the original used for scanning these pieces were not so good).