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Adjust SAM Level?
#54
(07-Feb-2020, 17:54)Confused Wrote:
daniel.avasilichioaei Wrote:P.S .: If SAM does not treat a simple wave (pure test tones) correctly, what can we expect in case of a very complex wave (such as music)?...

Perhaps counter intuitive, but I can think of reasons why a simple wave / pure tone could cause SAM problems when complex music does not.  For example, the algorithms and mathematics used in SAM might have issues with division by zero errors (or similar) with a simple wave that could not occur with a more complex signal.  This is pure speculation on my part, but it is perhaps possible.


I have very big doubts about this possibility when we talk about software. The division with 0 appears both at the simple and complex waves. If SAM had problems with the division with 0, then... it would be sad. Big Grin
I do not mention the fact that one of the bugs is caused by a particular firmware, and in others it does not manifest, using the same waves.
In contrast, the complexity of the wave makes the defect more difficult to detect, which I have seen in practice.

In all the SAM profiles I saw on the Devialet site, the correction part of the SAM should change the amplitude of the wave to a reasonable extent (about 0 ÷ 30%). The problem is that in reality at some frequencies the change is much larger. Judging by the movement of the speaker membrane, it is consistently exceeded 100% in some cases.

There would be an element with possible impact: I saw that the SAM profile in the configuration file is the same, regardless of the Expert model, and regardless of the stereo or dual-mono configuration mode. However, the amplifier models, as well as the dual-mono configuration, have different performances. For example, I do not know if a SAM profile measured with an Expert Pro 250 stereo mode works correctly on an Expert Pro 140 dual-mono...

   
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Messages In This Thread
Adjust SAM Level? - by actx76092 - 28-Mar-2015, 23:51
RE: Adjust SAM Level? - by Damon - 29-Mar-2015, 01:27
RE: Adjust SAM Level? - by actx76092 - 29-Mar-2015, 02:24
RE: Adjust SAM Level? - by Damon - 29-Mar-2015, 03:40
RE: Adjust SAM Level? - by actx76092 - 29-Mar-2015, 03:53
RE: Adjust SAM Level? - by Damon - 29-Mar-2015, 05:00
RE: Adjust SAM Level? - by hk6230 - 29-Mar-2015, 08:01
RE: Adjust SAM Level? - by iamwappie - 29-Mar-2015, 08:19
RE: Adjust SAM Level? - by hk6230 - 29-Mar-2015, 08:33
RE: Adjust SAM Level? - by actx76092 - 29-Mar-2015, 16:23
RE: Adjust SAM Level? - by Yippedidou - 09-Apr-2015, 01:48
RE: Adjust SAM Level? - by Vivialet - 29-Mar-2015, 16:35
RE: Adjust SAM Level? - by Damon - 29-Mar-2015, 17:10
RE: Adjust SAM Level? - by actx76092 - 29-Mar-2015, 19:29
RE: Adjust SAM Level? - by actx76092 - 30-Mar-2015, 00:44
RE: Adjust SAM Level? - by Damon - 30-Mar-2015, 01:52
RE: Adjust SAM Level? - by Vivialet - 30-Mar-2015, 13:31
RE: Adjust SAM Level? - by actx76092 - 30-Mar-2015, 14:12
RE: Adjust SAM Level? - by Jnan_devi - 09-Apr-2015, 15:43
RE: Adjust SAM Level? - by Confused - 30-Mar-2015, 17:16
RE: Adjust SAM Level? - by Damon - 30-Mar-2015, 20:51
RE: Adjust SAM Level? - by davee - 08-Apr-2015, 08:47
RE: Adjust SAM Level? - by Jnan_devi - 09-Apr-2015, 17:54
RE: Adjust SAM Level? - by Jnan_devi - 10-Apr-2015, 09:05
RE: Adjust SAM Level? - by thumb5 - 10-Apr-2015, 09:56
RE: Adjust SAM Level? - by Jnan_devi - 10-Apr-2015, 10:17
RE: Adjust SAM Level? - by Jnan_devi - 10-Apr-2015, 11:01
RE: Adjust SAM Level? - by Jnan_devi - 10-Apr-2015, 11:15
RE: Adjust SAM Level? - by Damon - 10-Apr-2015, 21:16
RE: Adjust SAM Level? - by hk6230 - 11-Apr-2015, 01:04
RE: Adjust SAM Level? - by Damon - 11-Apr-2015, 02:07
RE: Adjust SAM Level? - by Jnan_devi - 11-Apr-2015, 17:04
RE: Adjust SAM Level? - by hk6230 - 11-Apr-2015, 02:27
RE: Adjust SAM Level? - by Damon - 11-Apr-2015, 19:02
RE: Adjust SAM Level? - by Jnan_devi - 12-Apr-2015, 01:38
RE: Adjust SAM Level? - by Jnan_devi - 15-Apr-2015, 03:33
RE: Adjust SAM Level? - by Confused - 12-Apr-2015, 00:40
RE: Adjust SAM Level? - by Jnan_devi - 12-Apr-2015, 01:45
RE: Adjust SAM Level? - by Damon - 12-Apr-2015, 03:00
RE: Adjust SAM Level? - by tom_austria - 14-Apr-2015, 21:10
RE: Adjust SAM Level? - by Damon - 14-Apr-2015, 22:02
RE: Adjust SAM Level? - by Damon - 15-Apr-2015, 04:17
RE: Adjust SAM Level? - by Jnan_devi - 15-Apr-2015, 06:26
RE: Adjust SAM Level? - by sjors.ehv - 06-Feb-2020, 11:04
RE: Adjust SAM Level? - by K4680 - 06-Feb-2020, 13:24
RE: Adjust SAM Level? - by Pim - 07-Feb-2020, 10:34
RE: Adjust SAM Level? - by Jean-Marie - 06-Feb-2020, 12:23
RE: Adjust SAM Level? - by Delija - 06-Feb-2020, 13:31
RE: Adjust SAM Level? - by Confused - 07-Feb-2020, 14:22
RE: Adjust SAM Level? - by Confused - 07-Feb-2020, 17:54
RE: Adjust SAM Level? - by daniel.avasilichioaei - 07-Feb-2020, 18:54
RE: Adjust SAM Level? - by Confused - 08-Feb-2020, 10:03
RE: Adjust SAM Level? - by Jean-Marie - 08-Feb-2020, 11:29
RE: Adjust SAM Level? - by David A - 08-Feb-2020, 11:37
RE: Adjust SAM Level? - by Jean-Marie - 08-Feb-2020, 12:33
RE: Adjust SAM Level? - by Vivialet - 08-Feb-2020, 14:17
RE: Adjust SAM Level? - by Jean-Marie - 08-Feb-2020, 14:40
RE: Adjust SAM Level? - by David A - 08-Feb-2020, 21:58
Adjust SAM Level? - by Waiski - 08-Feb-2020, 20:09
RE: Adjust SAM Level? - by David A - 08-Feb-2020, 21:33
RE: Adjust SAM Level? - by Delija - 08-Feb-2020, 22:15
RE: Adjust SAM Level? - by David A - 08-Feb-2020, 22:54

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