Hello Earl,
To share with the others I think it is better to use a .wav format (eventually under .txt format)
Best regards from Paris, France
Jean-Michel Le Cléac'h
Hi Earl,
Thank you for quick response with Abbey’s IR. Text file works for me OK.
I have a couple of questions thought. (1) what was the sampling rate, and (2) what type and length of window was used?. I am trying to correlate with the FR posted on your website.
Next, I am also interested other loudspeakers, particularly in Summa’s IR, as it seems to be your popular flagship.
Best Regards,
Bohdan
And here is the impulse and frequency response, with phase inversion and manual offset adjustment
(assuming 44.1khz sampling here)
With gating just before what appear to be the first reflection
And smoothed without gating, just to see/guess what is going on down low
(assuming 44.1khz sampling here)
With gating just before what appear to be the first reflection
And smoothed without gating, just to see/guess what is going on down low
Attachments
and now just for the fun the same impulse corrected using rePhase:
phase linearizion of an LR24 at 1200Hz, and a closed box at 100Hz with bessel Q
(no other phase EQ used)
That fits quite well with the theory, which tends to indicate this speaker is very well behaved and filtered (as expected)
phase linearizion of an LR24 at 1200Hz, and a closed box at 100Hz with bessel Q
(no other phase EQ used)
That fits quite well with the theory, which tends to indicate this speaker is very well behaved and filtered (as expected)
Attachments
Hello Pos,
As nobody seems to want to do it, could you please, put the corresponding .wav files attached to a message on that thread after changing the extension .wav by .txt so it could be accepted as an attached file. Then everyone can turn back the file extension to.wav which is a more general format than the one used in Holm.
Thank you!
Best regards from Paris, France
Jean-Michel Le Cléac'h
As nobody seems to want to do it, could you please, put the corresponding .wav files attached to a message on that thread after changing the extension .wav by .txt so it could be accepted as an attached file. Then everyone can turn back the file extension to.wav which is a more general format than the one used in Holm.
Thank you!
Best regards from Paris, France
Jean-Michel Le Cléac'h
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I don't remember the sample rate, but it was either 44.1 or 48 kHz. There is no window in that data.
I have not made Summas in more than 5 years and don't have any recent impulse responses for it. The Abbey is now the "flagship" speaker and with its continual development may be a better speaker than the Summa.
Why don't you send me a complete set of data so that I can post it on my web site along with all the others?
Hello Jack.
Is there a foam plug or not?
Best regards from Paris, France
Jean-Michel Le Cléac'h
Little patience EarlThis measurement I did yesterday and for you I need put on turntable and learn how to use Holm
Please remember the very specific format that is required. let me know if you need this again, but I have posted it several times. I can't use the data if its not in the right format.
I am not sure that Holm is absolutely required, it seems that all software packages should allow for the export of impulse responses as *.txt files. Or certainly the conversion is trivial. I am just not going to do all this work myself since it could get out of hand. I did all the work in creating the software program to show the data.
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Check it for what? It can't be what I need since I need everything in one file. It does not matter where the impulse starts and it should NOT be windowed as that is done on my end.
There needs to be a header just like:
#
# Measurement exported using HOLM Acoustics software
# HOLM Acoustics
#
# First sample number in file: -100
# Last sample number in file: 4500
# Samplerate: 44100
#
## sample,0 (00) ,1 (05) ,2 (10) ,3 (15) ,4 (20) ,5 (30) ,6 (40) ,7 (50) ,8 (60) ,9 (80) ,10 (100) ,11 (120) ,12 (150) ,13 (180)
-100,-7.43306883459e-006,2.86018157825e-006,6.27005155779e-006,4.39374746498e-006,8.72339117199e-006,3.6713440034e-006,-1.05739692003e-006,4.18283697064e-006,4.03583531653e-007,-4.59714287441e-006,1.40098601313e-006,7.79777678054e-006,-3.85185532389e-006,1.70386726076e-006,4.55483253995e-005,8.79958182993e-005,4.59916295515e-005,7.6408083237e-005
The only line in the header that has to be exactly like above is the one with the sample rate. Otherwise each line can just start with "#". I am not sure if the exact number or "#" lines is required, but I would make it so just to be safe. The data must have the sample number, (contiguously as the program will stop if there is a gap, as has been noted in some Holm exports) followed by the 14 impulse responses delimited by a comma. Any deviation from this and the program won't read the file and we are back to square one.