New Audiolense releases

[juicehifi]

Thank you, great report. I’ll look onto this at first convenience.

 

[Cornelis Huizinga]

Today I started using version 0.7. First I aligned the microphone as best as possible. I measure with a Motu UltraLite mk5, so no hassle with 2 devices.

The first measurement of my active 3-way speakers was disappointing. The first screenshot shows that the right tweeter and midrange have no delay compared to each other. The left channel shows the delay as I am used to. To check, I also measured with version 6.29. That looks good.

I repeated the measurements a few times and reinstalled 7.0. No change. If I delete the al.ini file, it does show a delay in the right channel in the first measurement, but not as precise as with the 6.29 version. The following measurements then show 0 delay again.

I don't know if this is a bug, or just ignorance on my part. Hopefully someone knows a solution.

 

[juicehifi]

Yes, that doesn’t look right. Could be only the numbers, though. How do the pulses look? Do they have the anticipated delay?

 

[Cornelis Huizinga]

Hi Bernt,

Hopefully what I did is correct. First I filtered the measurement with the 7.0 version and then I zoomed in on the tweeter and midrange impulses on the filtered measurement. The result is visible on the enclosed screenshot. I hope this is useful to you.

Cornelis

 

[Cornelis Huizinga]

In addition:

If I compare the measurement between version 6.29 and 7.0, the difference between right tweeter and midrange is at 7.0 (31ms) and 6.29 (127ms)

 

[juicehifi]

I think you should proceed with these measurements. I believe they are good. The first negative peak is interpreted as the peak of the midranges here, that's why the mids are interpreted to arrive earlier than the tweeters.

For a TTD correction the peak finding has no consequence unless you edit the timing manually. For a frequency correction there's a risk that the mids are interpreted as having negative polarity here. However, things may change after the crossover has been applied.

Anyway I recommend that you disable the automatic polarity correction from the measurement menu. When you have done that, you should enter the measurement module and change one of the delay values. This will make the "reset delay" button visible. So press that button, resave the measurement and send it to the main form.

I do not understand the milliseconds you mention in your most recent post. Your screen shots shows 0.08 ms delay for the 7.0 measurement...

 

[Cornelis Huizinga]

Hi Bernt,

You were absolutely right. With the automatic polarity check disabled, the measurements for both 6.29 and 7.0 were identical. The tweeters are now set to a delay of 0 and the midwoofers to 0.05. Yesterday's measurements looked quite messy. I live next to a busy road and the attic where I measure is far from quiet. At night it is a lot better.

Once again, many thanks for your explanation.

Cornelis