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Topics - hsei

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1
Bugs / Global optimization does not work for huge collection
« on: December 29, 2017, 20:44:20 »
I tried to compare about 3000 files against a huge collection of 250 K songs in two groups, having created before a cache.dat of 4.5 GB.
Global optimization creates another data.dat of 20 GB (+index.dat, links.dat), found no duplicates in 12 hours with almost 100% completed and finally crashed, removing the disk (SSD) with the data from the file system.
The disk could only be recognized again by cold boot.

Doing the same without global optimization finished successfully in 4 hours, finding about 200 duplicates.

2
Bugs / No sorting in some columns of result window
« on: June 01, 2011, 21:20:51 »
Sorting by clicking in header field works for file, content and tags column, but not for precise and all further.
(1.6.0 build 1200)

3
Bugs / Apply in edit window loses changes
« on: April 28, 2011, 11:33:05 »
"Copy all" does not copy file name, which could be tolerable, but when you change anything in the file name field all previous changes in the tab region are lost after pressing "Apply".

4
Bugs / Spectrum analysis overoptimistic
« on: February 22, 2011, 18:44:39 »
The max. frequency value in the spectrum analysis window is in some cases too optimistic. It seems to be oriented on max. frequency level (red), not on average frequency level (blue). When the average level drops down, while the max. level stays high, this an indication that the noise level drastically increased at higher frequencies caused by alias effects by violating the nyquist limit or by high frequency mismatch during compression/decompression.
In this case the rating value is misleading (higher value - worse quality).

5
Bugs / 1.5.3 odd behaviour
« on: February 05, 2011, 18:35:18 »
Sorry to say that the current version of similarity (1.5.3 build 1001) got less stable:

For large numbers of songs (>50K) the duplicate scan freezes from time to time, no CPU and file activity any more. When restarted, program stops at the same progress indication (xx.x%) again. When starting environment is changed (different directories or cache cleared) program sometimes arrives at 100%, sometimes stops elsewhere.

After successful search usage of GUI resources often fails: No reaction to ctrl-S or right click to spectrum analysis, no reaction to Enter or Play and other right click menu items. After some playing around (resorting, resizing etc.) ctrl-S suddenly works but after a few successful actions fails again.

Additional strange behaviour: Cursor shape does not change from border icon (N-S-arrow) to normal in client area, toggles rapidly back and forth between normal and N-S-cursor on action fields. Menu bar icons disappear and reappear whereas balloon tips and click actions function normally.

6
Bugs / Spectrum analysis for groups crashes
« on: January 26, 2011, 20:09:34 »
When spectrum analysis is called by right click for two or more files, it crashes constantly  :( .
Fortunately only function call crashes, results windows remains operable, single call of spectrum via Ctrl-S works.

7
Bugs / File editing
« on: January 16, 2011, 22:22:16 »
Copy all in the edit window does not copy filename. Doesn't matter too much: Click on file name tag completes task. Otherwise good idea: Copying filenames from another grouped  file is what is almost always wanted.

8
Wishlist / Use ID3v2 in tags
« on: December 11, 2010, 09:20:06 »
I propose to use ID3v2 tags in addition (if present) in tag editing.
ID3v1 is restricted to entries with maximal 30 characters, which sometimes cuts off information.

9
Wishlist / Filenames editable
« on: October 23, 2010, 20:03:07 »
I would like to have not only ID3 tags editable in the edit window, but also filenames.
A quick "browse this file" (Ctrl-b) is not always useful, especially if the directory contains many files.

10
Wishlist / Shortcut for Spectrum Analysis
« on: October 23, 2010, 19:57:48 »
I would greatly estimate to have a keyboard shortcut for spectrum analysis. If that shortcut would apply to all selected files in the results list (like e.g. delete), it would be almost perfect for me.

11
Bugs / New analysis mode
« on: September 24, 2010, 11:09:14 »
The new analysis mode is a nice feature, but has to be used with caution:
VBR files are rated totally false, the bitrate is taken from the first frame(s) where it is typically very low. Consequently the duration is calculated much too high (total size by first frame size).
Reading of further frames seems to take into account the bitrate in frame header, otherwise complete rubbish would appear.
I would advise to ether correct ratings for VBR to average bitrate or drop rating (at the moment)  for VBR at all.
In frequency analysis I found another problem: I got a rating of 100% for a file sampled at 44100 Hz with a max. frequency of 22050. Files should never contain frequencies up to the Nyquist frequency (half the sample rate), because that leads to annoying alias frequencies. That should lead to drastic reduction in quality rating. For the file in question I found no perceptible degradation, so the max. frequency value may be an analysis flaw.
Again: Be reluctant with analysis ratings, but with some caution it's a valuable feature. Calculating quality measures is a demanding task.

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