@daniel.avasilichioaei - Your last post has actually given me a couple of ideas for things I can use to test what SAM is doing, although that will need to wait until another time, I have a busy weekend ahead, followed by a busy time at work, so playing with SAM gets added to my "to do" list for now. What I can say now is that I agree with you, I do not think there are actual division by zero errors occurring, I was just using this as an example of where simple things can upset a system, whereas more complex things may not. As to the actual mathematics behind SAM, I do not believe anyone outside of Devialet has any true knowledge, I certainly do not.
Anyway, looking at your post yesterday I spotted something regarding the SAM "before and after" plots. Below I have posted the Blade and Blade 2 SAM plots as an example of what I noticed. Now like most things with Devialet, there is no proper explanation of what these graphs show, indeed, the plots have no scale, units or anything else. So we are left to ourselves to work out what the mean. The Blade SAM profile was a relatively early one to be done, before the days of "SAM 2". Some will remember that after firmware 8.0 was released, any new SAM profiles were designated "V8", although this seems to have stopped now. The Blade 2 profile was later, and originally designated V8.
With the Blade profile, it looks like the "before" graph shows the light coloured line as the signal, and the darker orange line as the actual, which is a little short of amplitude, and a little behind time. In the "after" plot, SAM miraculously moves the orange actual plot in line with the signal white plot.
With the Blade 2 plot, the convention appears to have changed. In the before plot, the orange line has greater amplitude, this this looks to me as representing the additional signal SAM needs to produce to get the speaker to align with the signal as shown in the "after" plot. However anyone interprets this, there is no doubt that the Blade and Blade 2 plots are showing different things. I also note that the scale of the amplitude is different between the Blade and Blade 2 plots, and is also a little different between other SAM plots. All a little inconsistent. Another point to note is that the white "signal" line is slightly different in profile between the Blade and Blade 2 plots. Why should this be? The cynical side of my mind starts to wonder if these plots are knocked up by someone in the promotional department, but I do hope that is not true.
I am not trying to make a big point here, consider this simply as a piece of Devialet trivia that just happened to get my interest last night. But maybe there is something behind all this? It looks to me that the convention of the plots has changed, maybe at the time of SAM2 and V8 profiles. I have not checked al the profiles for this, and neither could I, I do not know the dates at which any given profile was produced, I just happen to know the history of the Blade and Blade 2 profiles. Just another miss-fitting piece in the Devialet mystery jigsaw puzzle.
Or maybe there is something I am missing here? Does anyone else have any ideas about this?
Anyway, looking at your post yesterday I spotted something regarding the SAM "before and after" plots. Below I have posted the Blade and Blade 2 SAM plots as an example of what I noticed. Now like most things with Devialet, there is no proper explanation of what these graphs show, indeed, the plots have no scale, units or anything else. So we are left to ourselves to work out what the mean. The Blade SAM profile was a relatively early one to be done, before the days of "SAM 2". Some will remember that after firmware 8.0 was released, any new SAM profiles were designated "V8", although this seems to have stopped now. The Blade 2 profile was later, and originally designated V8.
With the Blade profile, it looks like the "before" graph shows the light coloured line as the signal, and the darker orange line as the actual, which is a little short of amplitude, and a little behind time. In the "after" plot, SAM miraculously moves the orange actual plot in line with the signal white plot.
With the Blade 2 plot, the convention appears to have changed. In the before plot, the orange line has greater amplitude, this this looks to me as representing the additional signal SAM needs to produce to get the speaker to align with the signal as shown in the "after" plot. However anyone interprets this, there is no doubt that the Blade and Blade 2 plots are showing different things. I also note that the scale of the amplitude is different between the Blade and Blade 2 plots, and is also a little different between other SAM plots. All a little inconsistent. Another point to note is that the white "signal" line is slightly different in profile between the Blade and Blade 2 plots. Why should this be? The cynical side of my mind starts to wonder if these plots are knocked up by someone in the promotional department, but I do hope that is not true.
I am not trying to make a big point here, consider this simply as a piece of Devialet trivia that just happened to get my interest last night. But maybe there is something behind all this? It looks to me that the convention of the plots has changed, maybe at the time of SAM2 and V8 profiles. I have not checked al the profiles for this, and neither could I, I do not know the dates at which any given profile was produced, I just happen to know the history of the Blade and Blade 2 profiles. Just another miss-fitting piece in the Devialet mystery jigsaw puzzle.
Or maybe there is something I am missing here? Does anyone else have any ideas about this?
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