HOLMImpulse: Measuring Frequency- & Impulse-Response

[doug20]

Originally posted by aduljr
How about a community wiki for the documentation? Let us help contribute to it as well.

How about a HOLM for Dummies? (Me, I feel dummer by the day on this site!!).

I do not want to bog down this thread with really silly and probably easy to answer questions, could we create a HOLM for dummies thread?

[gedlee]

I think that tis thread is ideal for learning - as good as any. First thing, of course, is to get the software and run it. Then ask the questions as they come up.

[askbojesen]

Originally posted by doug20
How about a HOLM for Dummies? (Me, I feel dummer by the day on this site!!).
I do not want to bog down this thread with really silly and probably easy to answer questions, could we create a HOLM for dummies thread?

You are most welcome to start this new thread, I suggest you call it
"HOLMImpulse in practice" ?? (You might offend somebodies mind...)
I'll be happy to answer questions in that thread also.

But I think that gedlee is right, lets keep this thread alive, so it would be nice to see some responses with responses

If you are not able to get a proper response, or nothing at all, then show what you have got anyway! - I might have some tricks.

Or Bugfixes or features or...

[David_Web]

I have a small bug with the installer.
When done the dialog just sits as 90% indefinitely until I change focus to another app at which point it goes to 100% with the close button enabled.
Looks like it does not detect when the installer is done (closed).

Nothing major just thought you might want to know.
No info that I can think of to help you nail it down.

[David_Web]

Here are some measurement I made with an older version about a year ago (opened with the latest version to take screenshot)
The drives B&C 15PE40 where hung free about 1.8m up in the air. The mic was placed 1m in front of it. The mic was a XTZ room analyzer (does anyone have a cal file for this mic?)
The room looks like it creates some nasty artifacts. 7.5m x 3.9m x 2.3m concrete with windows on the right wall.

The consistency if the drives looks impressive considering they where used when I bought them. Think they came from a theater but I'm not sure.



Any comments?

[askbojesen]

Originally posted by David_Web
Any comments?

http://img8.imageshack.us/img8/2861/boc15pe40holm.png

The image server is very slow 1.6 KB/sec ....
Maybe a comment tomorrow, when the image has been downloaded

Ohh now the image came...

• The Impulse is inverted - Try "Invert recorded signal" under device settings or the "Invert Amplitude" button under "Options" for each measurement
• What about the timewindow? Also under the options menu for each measurement - try the autodetect (This is done automatically when you measure)
• If you want the total response the choose a smoothing 1/N Octave filter (Also under options)

[gedlee]

The software installs OK under Vista - 64 bit and it opens. But it doesn't recognize the sound card and it crashes whenever any sound card features are attempted, like trying to select the sound card.

[Pano]

Running on an old HP laptop - WinXP. M-Audio USB Duo as sound card.

Everything seems to work just fine. Software even told me the input was clipping during calibration. Turned it down a bit, got a good file.

All seems to work well - all 3 methods give same results (sweep, chirp, MLS).

OK, So now what do I do with it?

[doug20]

Originally posted by askbojesen


You are most welcome to start this new thread, I suggest you call it
"HOLMImpulse in practice" ?? (You might offend somebodies mind...)
I'll be happy to answer questions in that thread also.

But I think that gedlee is right, lets keep this thread alive, so it would be nice to see some responses with responses

If you are not able to get a proper response, or nothing at all, then show what you have got anyway! - I might have some tricks.

Or Bugfixes or features or...

Thats cool, I can keep it here. I have it running but I didnt get to far with the soundcard measurements. It just didnt look right so I went back to using REW and ARTA for quick measurements of my new speakers.

I will spend sometime this weekend getting screen shots and questions ready.

[askbojesen]

Originally posted by gedlee
The software installs OK under Vista - 64 bit and it opens. But it doesn't recognize the sound card and it crashes whenever any sound card features are attempted, like trying to select the sound card.

Sorry to hear this, I must install a 64 bit Vista and test for my self.

(The audio library is portaudio which can work in 64 bit, so there is hope...)

I'll let you know when I have figured this out