Hi there,
I hope I´ve choosen the correction section here - the topic fits in several sections but as It´s main relation is the WIIM Ultra and it´s subwoofer time alignment, I´ve choosen here.
Today I wanted to verify how the automatic time alignment for the sub out, which the WIIM Ultra offers, is working.
As reference I´ve attached the screenshots with delay values from REW, from the WIIM App and also the .mdat file (containing 2 measurements), If anyone wants to verify.
I´ve measured (with timing reference, mic always same position) the sub with a testsignal 20-200hz (multisub consisting of 4 subwoofers, aligned and eq´d with MSO and minidsp 2x4hd; connected as "single sub" to the subout of the WIIM Ultra) and also the front Left (20-200hz) in separate and used the different alignment tools REW offers. I then used the automatic alignment tool of the WIIM Ultra and compared the values. The results are shown in the below table:
I wanted to know which method the WIIM uses - Impulse or Phase and hoped, that I can verify the values of the WIIM with REW. I could not but I have an assumption.
While the Alignment Tool of REW offers many different values (also inverting the subs or even delaying the subs instead of the main speaker) and is mainly dependent of the choosen crossover, the fact came up, that the automatic delay values of the WIIM are heavily dependent of the choosen master volume (the volume you change e.g. using the remote control or smartphone app).
As a consequence I assume, that WIIM uses for alignment the impulse response, as the delay value doesn´t differ no matter which crossover you chose. And the WIIM Values (22-29ms) come the closest to the REW values of my manually impulse alignment (21-22ms). So it is very important, when you use the time alignment of the WIIM, that you verify in the first instance, that sub and main speaker have a similar volume while the measurement occurs.
Which is the "right" delay value - this question remains unanswered for me. I´m curious what you guys think!
Greetings
Paffi
I hope I´ve choosen the correction section here - the topic fits in several sections but as It´s main relation is the WIIM Ultra and it´s subwoofer time alignment, I´ve choosen here.
Today I wanted to verify how the automatic time alignment for the sub out, which the WIIM Ultra offers, is working.
As reference I´ve attached the screenshots with delay values from REW, from the WIIM App and also the .mdat file (containing 2 measurements), If anyone wants to verify.
I´ve measured (with timing reference, mic always same position) the sub with a testsignal 20-200hz (multisub consisting of 4 subwoofers, aligned and eq´d with MSO and minidsp 2x4hd; connected as "single sub" to the subout of the WIIM Ultra) and also the front Left (20-200hz) in separate and used the different alignment tools REW offers. I then used the automatic alignment tool of the WIIM Ultra and compared the values. The results are shown in the below table:
I wanted to know which method the WIIM uses - Impulse or Phase and hoped, that I can verify the values of the WIIM with REW. I could not but I have an assumption.
While the Alignment Tool of REW offers many different values (also inverting the subs or even delaying the subs instead of the main speaker) and is mainly dependent of the choosen crossover, the fact came up, that the automatic delay values of the WIIM are heavily dependent of the choosen master volume (the volume you change e.g. using the remote control or smartphone app).
As a consequence I assume, that WIIM uses for alignment the impulse response, as the delay value doesn´t differ no matter which crossover you chose. And the WIIM Values (22-29ms) come the closest to the REW values of my manually impulse alignment (21-22ms). So it is very important, when you use the time alignment of the WIIM, that you verify in the first instance, that sub and main speaker have a similar volume while the measurement occurs.
Which is the "right" delay value - this question remains unanswered for me. I´m curious what you guys think!
Greetings
Paffi
Attachments
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WIIM, high volume, 29ms.png116.4 KB · Views: 37
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Measurements for Sub Alignment.zip1,014.4 KB · Views: 22
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Manuell Alignment, Delay with Timing Reference, 18,1ms.jpg261.6 KB · Views: 36
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Manuell Alignment Impulse Response, Peak, 21ms.jpg263.9 KB · Views: 34
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Manuell Alignment Impulse Response, Dip, 22ms.jpg269.5 KB · Views: 30
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Alignment Tool, 140hz, Phase, 16,5ms.jpg254 KB · Views: 29
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Alignment Tool, 140hz, Phase Slopes, 13,4ms.jpg257.4 KB · Views: 31
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Alignment Tool, 140hz, Impulse, -5,3ms.jpg235.7 KB · Views: 33
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Alignment Tool, 100hz, Phase, 16,9ms.jpg250.7 KB · Views: 30
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WIIM, low volume, 22ms.png116.5 KB · Views: 34
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WIIM, medium volume, 26ms.png116.7 KB · Views: 31
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Alignment Tool, 80hz, Impulse, 12,7ms inverted.jpg232.2 KB · Views: 30
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Alignment Tool, 80hz, Phase Slopes, 10,9ms.jpg253.7 KB · Views: 32
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Alignment Tool, 80hz, Phase, 8,4ms.jpg246.4 KB · Views: 32
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Alignment Tool, 100hz, Impulse, 29,3ms.jpg234.3 KB · Views: 28
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Alignment Tool, 100hz, Phase Slopes, 14ms.jpg256.9 KB · Views: 34