Sample rate and sweep range question

[jtalden]

I have just changed to a newer version of my audio interface; a Focusrite 2i2 G2 device using the Focusrite supplied ASIO driver. I also updated to the latest version of REW, V5.20 beta 4 for multiple instances. Windows 10 has also updated itself currently at V 1803 Build 17134.556. With these changes, I am now experiencing a couple of issues that have not been a problem previously.

1. REW no longer remembers my preferred sample rate of 96kHz from session to session. On startup it sets 48 kHz and rightly warns the soundcard cal file is for another sample rate (96 kHz). Using soundcard properties, REW will properly allow resetting the rate to 96k - only a minor irritant.
2. A

fter having set the sample rate to 96 kHz, ​

REW still will only accept a maximum measurement sweep range entry of 24 kHz . Any measurements taken are indeed taken at a 96 kHz sample rate, but my current need is to sweep to 48 kHz not 24 kHz. Both the signal generator and the RTA will output up to 48 kHz, but REW will still not allow max sweep entry above 24 kHz.

If I fool around long enough; reloading the ASIO driver, taking sweep measurements, RTA measurements, and signal generator actions I can usually eventually get REW to accept a max sweep entry of 48 kHz.
​

Has anyone with a 2i2 G2 experienced this and resolved it? Is there a different driver that will resolve this?

 

[EarlK]

Hi John,

Your situation mirrors mine for both my 2i2 ( Gen1 ) and my Tascam US144 .

I believe this has already been mentioned to John as a bug.

I think a fix is in the making for the next beta.

 

[jtalden]

Thanks Earl. I am not even able to get java drivers to work correctly now so I will just wait for the next beta. I have some other setup work I can do at 48k.

 

[EarlK]

John,

Here's the thread I was referring to;


REW 5.20 Beta 4 Unable to sweep higher than 22,050kHz even with 96kHz sample rate?


I guess we should additionally post are Windows10 finding there.

 

[jtalden]

Thanks for doing that.

 

[John Mulcahy]

Per that thread, to work around the sweep range bug open the Measure dialog after you start REW, then close it. Change the sample rate in the soundcard settings then change it back to the rate you want. Should then work correctly until REW is next started. I'll look at the ASIO sample rate not being restored on startup.

 

[John Mulcahy]

Sample rate not being restored has been fixed for the next beta.

 

[jtalden]

Thanks John!