Re: documentation
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?
aduljr said:
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?
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.
HOLMImpulse in practice - New 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...
doug20 said:
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...
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.
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.
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?
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.
An externally hosted image should be here but it was not working when we last tested it.
Any comments?
David_Web said:
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)
Attachments
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.
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?
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?
Re: HOLMImpulse in practice - New thread ?
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 said:
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.
64 bit
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
gedlee said:
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
One odd thing I found:
Made a measurement in A . Exported it as a text file.
Imported into B. Level was down 5dB. Same curve, just 5dB lower on the graph.
Not sure why.
Made a measurement in A . Exported it as a text file.
Imported into B. Level was down 5dB. Same curve, just 5dB lower on the graph.
Not sure why.
Now that I have these nice mesurements in HOLMImpulse, is there somewhere to export them and see other views, such as CSD and/or spectrogram?
Hi Ask, I also would also like a Cumulative Spectral Decay waterfall thing like this:
Kindest - Your Boss 🙂
An externally hosted image should be here but it was not working when we last tested it.
Kindest - Your Boss 🙂
Loaded it on my XP-Pro machine, no problems. But a loopback measurement didn't look good and it was very difficult to figure out the problem.
I would suggest a window that shows the input and output time signals. Thats a big help in sorting out errors. And rather than use the generated signal directly, I would let the user select where to pick up this signal (i.e. a two channel input where one channel is what you do now and the other channel is the input signal picked up where it makes the most sense). This adds a great deal more flexibility in the usage of the system. This later aspect could be an option.
I would suggest a window that shows the input and output time signals. Thats a big help in sorting out errors. And rather than use the generated signal directly, I would let the user select where to pick up this signal (i.e. a two channel input where one channel is what you do now and the other channel is the input signal picked up where it makes the most sense). This adds a great deal more flexibility in the usage of the system. This later aspect could be an option.
Just installed HOLMImpulse and did a loopback test using Audigy 2ZS notebook soundcard. Things look good. There is no interchannel latency related issues. But now it seems besides a mic calibration, soundcard calibration might also be necessary as well. Probably the best way to do this is summing the mic and electronics curves to for a new calibration curve?
Well that's surpising. My M-Audio Duo measured flat as a pancake on loop-back. Just a little phase shift on the low end, not much tho. The calibration should take care of that.
Sure, calibration would include mic calibration, mic preamp (if nor originally included), and the soundcard. Although the SC and mic preamp would seem flat amplitude wise, the phase deviation accumulates pretty quickly. I am assuming the phase is measured instead of derived from the amplitude.
Hello,
Very nice tool, thanks.
It seem stable, practical and simple.
I agree with gedlee, a monitor of the levels send & return will be useful even more if we could have a test tone.
Also a csd waterwal will help a lot as said ThomasHolm.
Thanks again for your work.
Very nice tool, thanks.
It seem stable, practical and simple.
I agree with gedlee, a monitor of the levels send & return will be useful even more if we could have a test tone.
Also a csd waterwal will help a lot as said ThomasHolm.
Thanks again for your work.
Ask is away visiting family over the weekend..
Soongsc + panomaniac: Try running a "Make" DAC-ADC calibration with a loopback input to output shorted. This should solve your soundcard gain + phase problem and not interfere with the Mic calibration. If the uncalibrated loopback is severely off (More than 1-2dB amplitude deviation 20Hz to 20kHz) i would personally not use that card..
Soongsc + panomaniac: Try running a "Make" DAC-ADC calibration with a loopback input to output shorted. This should solve your soundcard gain + phase problem and not interfere with the Mic calibration. If the uncalibrated loopback is severely off (More than 1-2dB amplitude deviation 20Hz to 20kHz) i would personally not use that card..
ThomasHolm said:
He is not allowed to do that!! Call him up and tell him to get back to work!! We are all waiting here!🙂