Roland deemphasis

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When a signal is recorded by a Roland sampler, a slight boost is applied The following tests were done with a Roland S760 OS 2.24, Translator The procedure that I used for these tests is very simple and anybody The following response curves were exclusively calculated in the digital 
This first graph displays the curve of some deemphasis filters of Translator. The red curve is the Roland deemphasis included in the S760 (verified on a couple of units) The green curve is the standard deemphasis included in Translator. The blue curve is the special deemphasis included in Translator, note that this is the same curve as the standard one but shifted a little bit probably because the standard filter was removing too much medium frequencies. But because the order of this filter is not high enough it doesn’t do its job at the high frequencies. 
This second graph displays the curve of the deemphasis filter of Osmosis. The red curve is the Roland deemphasis included in the S760 The green curve is the deemphasis included in Osmosis. 
This third graph displays the curve of the deemphasis filter of CDXTRACT. The red curve is the Roland deemphasis included in the S760 (actually this curve is hidden behind the green one) The green curve is the deemphasis included in CDXTRACT, that’s what we call an exact deemphasis. 
The following screenshot is the result of subtracting one Roland sample from the same sample deemphasized by a S760. This is the emphasis part of the signal that should be removed. 
The next screenshot is the result of subtracting one Roland sample from the same sample deemphasized by the Translator ‘authentic’ filter. So this is the amount of signal that this ‘authentic’ deemphasis removes. This screenshot is at the same scale than the previous screenshot that’s why it’s easy to see that there is an important difference. 
The next screenshot is the result of subtracting one Roland sample deemphasized by a S760 from the same sample deemphasized by the Translator “authentic” filter. So this is the amount of error of this “authentic” filter. It looks like the previous screenshot but if you look closely you will see some differences. 
The next screenshot is the result of subtracting one Roland sample deemphasized by a S760 from the same sample deemphasized by CDXTRACT, no comment. 