Problem importing IR text files into Hypex HFD

[Vorreux]

Hello everyone,
I recently purchased two Hypex FA503 plate amplifiers, and I'm having problems using the HFD software.
This software allows you to import IRs in text format.
But when I look at the imported curve in the filter design, I see a curve identical to the one measured, but the horizontal scale is completely different.
Has anyone come across the same problem?
Are there any solutions?

Regards,

Pascal

 

[John Mulcahy]

If you only measured up to 1 kHz the IR you are exporting may have a low sample rate, as REW may decimate the IR to a lower rate if that is allowed in the Analysis preferences.

 

[Vorreux]

Thank you John,
But is it possible to "recover" existing files?
Attached is the text file of the curve I posted.
Otherwise, for future measurements, are there particular settings to use in REW?

Regards,

Pascal

 

[John Mulcahy]

From the sample interval value that data is at 11.025 kHz. If you drag that file onto the REW window it will import it, and show 11.025 kHz as the sample rate on the Info panel. You could then export the IR as WAV at 44.1 kHz and import that to REW, and finally export that IR file as text to get a 44.1 kHz file per the original measurement.

 

[John Mulcahy]

If you don't want REW to reduce sample rate in future, uncheck the "Decimate IR" box in the Analysis preferences.

 

[Vorreux]

Hello John,

Thanks a lot, it works perfectly!
But I'll get there much quicker by using REW's EQ functions, which are really remarkable, and by transferring their parameters to the Hypex crossover settings...
Thanks again!

Pascal

 

[Vorreux]

Hi John,

Almost all the measurements I've made over the last 10 years have been at a sample rate of 48 kHz.
I searched and finally found a few made with a 44.1kHz sample rate, and these are imported into HFD without any problem!
Good to know...

Pascal