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Preferences
This allows you to setup some values for the miscellaneous options.
This is accessible from the Tools → Preferences menu.
Graph positioning
This is the preferences menu from the Lite version.
- Graph auto-shuffle: When graphs are opened and closed they can be shuffled to fill the canvas area
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Graph use saved sizes: If autoshuffle is off then there is an option to use previous sizes.
Note: The Preview graph is special and always uses its previous size (which you can set).
At any time you can use the Tile function in the Graph menu to tile to the available space.
Segmentation - handle big files easily (Pro version only)
As some WAV files are quite large (and can use double the memory to process them) the segmentation option is useful to allow you to tune how it works.
i.e. to process a 16bit 300MB file requires 750MB of memory - which is quite a bit. While using this memory your machine slows down to a crawl and becomes quite unusable, unless you have heaps of RAM. Even then, some OSes can still reject the requests for memory!
Using this option changes the behaviour of the program, from a read, process, write operation to a read-process-write-read-process-write and so there is a 'trigger' threshold to make it use this mode:
- The first number to set is the amount of memory to use - before switching down to segments.
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The second number is the segment size to use, which roughly controls the amount of memory used.
Output effects (Pro version only)
Swap/Rotate channels
Rotate channels, so L→R and R→L
As described - it reverses the stereo effect, or rotates channels if you have more than 2.
Invert waveform
Invert the waveforms (180° phase shift)
Sometimes a CD has not got the absolute phasing correct, you can fix it with this option.
Digital Mastering Dither (Pro version only)
Dithering is the act of suppressing quantisation errors when going from a high resolution format to a lower one. When de-clipping WAVs in SeeDeClip the level is reduced - meaning that there may be a chance that the resultant waveform gain changes may sound better if we 'remaster' the track with dither, rather than just output the raw data.
The effect is to mask any quantisation noise with white noise, and lower the overall noise floor. It doesn't really do very much for treble however, and there may already be an element of dither left over from the original track, so you may need to listen before you decide.
i.e. some people however prefer the sound of the un-dithered output.
Useful references are:
Basically DeClip provides for a dither signal of between 0 to 8 bits with a noise shape (probability) of rectangle, triange and gaussian distributions. The dither is random enough to give a nice flat FFT plot and therefore suitable for studio and hi-fi use.
The bits specified are in addition to the actual lowering of resolution, so a 2 bit dither going from 24 to 16 bits actually applies a 10bit dither (or equivalent floating point amount).
Shape values:
- Rectangular (linear) probability distribution
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Trianguler probability distribution (the equivalent of throwing two dice and dividing by 2)
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Shallow gaussian probability distribution
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Sharper gaussian probability distribution (getting sharper as shape is increased)
Output options (wordsize) (Pro version only)
Note: For soundcards only, CD tracks must be 16bits or a CD player will create a wall of noise, not music
Convert to 8/16/24/32 rescaling or 32bit floating point.
This allows you to convert your waveforms to different resolutions. If for instance you have a 24bit playback mechanism then you will lose no information when a 16bit input file is used, with or without the scaling box being ticked.
If you are doing much audio processing than 24bits is highly recommended, each bit in a 16bit wav has an effect of 6dB in sound level, whereas in 24bit each of that coarse 6dB step is chopped into 256 different levels. Bear in mind the CD format limitation above however.
Notes:
- Converting from float to integer will always scale appropriately
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If you convert a higher bit signal into a lower one without scaling there will be huge clipping generated if the previous signal doesn't 'fit' into the lesser format.
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