Help REW won't measure speakers

[Richx200]

Hello,

I've been working on my sub problem for a while now, and I ran into this problem with REW that I cannot seem to correct no matter what I try. All I get are smooth line with no readings of the test tone. I have tried every thing in the REW manual and more. I'm sure it's something I overlooked, I have attached screenshots of what I've been encountering while running the tests. I'm using a MiniDsp Flex with four subs, I connected it as per MiniDsp's Multi Sub Optimization. The Computer has a mini jack that the left RCA plugs into the DSP's number one input and the right goes into the input on the AVR. REW is set to analog speakers. If you check my test screen you can see I'm getting timing and test tone but nothing on the graph, so I know the setup in correct, I just don't know why I'm not getting the results. I'm using an Umic 2 and I tested it over and over to make sure it works, and it's set up correctly in REW.

I hope someone can help me with this. Thank you for your time.

 

[-Matt-]

In your input setup what other options do you have? I think you should select the UMIK2 here.

 

[JustJones]

Should the mic have the same calibration file as soundcard? It's usb right?

Calibrating the Interface​

This step is not applicable when using a USB microphone

 

[RayDunzl]

UMIK-1 USB, has a calibration file.

The step you refer to is for microphones with a separate ADC interface where the SPL level is not known, and you have to calibrate the level against a known device/level.

The calibration file for UMIK applies an adjustment to the frequency response. Here's the shape of the calibration file for mine.

 

[JustJones]

UMIK-1 USB, has a calibration file.

The step you refer to is for microphones with a separate ADC interface where the SPL level is not known, and ou have to calibrate the level against a known device/level.

View attachment 410438
It looks like he has the input and output using the same calibration file which I guess ASIO does According to the manual. I always used JAVA.

ASIO drivers on Windows support up to 1536 kHz if the interface offers that and a variety of formats depending on the driver. ASIO drivers support one ASIO device which must be used for both input and output and REW has no control over levels. Pseudo-ASIO drivers such as FlexASIO and ASIO4All create an ASIO wrapper around the WDM drivers for devices, allowing input and output through different devices.

 

[RayDunzl]

I always used JAVA.

Yes

 

[Richx200]

View attachment 410436

In your input setup what other options do you have? I think you should select the UMIK2 here.

The input there refers to the sub number being tested, In that input I have 1-4 (testing 4 subs) using the MiniDsp Asio.

 

[Richx200]

Should the mic have the same calibration file as soundcard? It's usb right?

Calibrating the Interface​

This step is not applicable when using a USB microphone
View attachment 410437

They are subs I entered the cal file there as a act of desperation.

 

[Richx200]

Yes

View attachment 410441

I tried Java, Flex, and Aiso4All and the only change is sometimes I would get a result that looked like a comb filter just looping lines.

 

[Richx200]

UMIK-1 USB, has a calibration file.

The step you refer to is for microphones with a separate ADC interface where the SPL level is not known, and ou have to calibrate the level against a known device/level.

View attachment 410438
It looks like he has the input and output using the same calibration file which I guess ASIO does According to the manual. I always used JAVA.

These screenshots were taken when I was using MiniDsp's Asio.

 

[Richx200]

I still don't know why I cannot get a reading. Here is the cable configuration I have to use.

Appendix A: Using all outputs for subs [Top]​

If it's desired to use all four outputs for subwoofers, use stereo analog outputs directly from the computer as shown in Figure 10. Connect the left channel output to Input 1 of the 2x4 HD and the right channel output to the input of the amplifier for the acoustic timing reference.

Figure 10. Measurement connections for multisub system with 4 subwoofers

In REW, set the output device to the inbuilt analog output (and not to the 2x4 HD).

I tried the speakers and headphones for the analog output,

 

[AnalogSteph]

1. Unless the AVR is only used as a dumb fixed-level amplifier with nobody ever touching the volume control, the miniDSP should be fed from its sub pre-out.
2. REW does not support multi-device ASIO, so unless you are combining WDM devices for the miniDSP and UMIK-1 in ASIO4All you won't have both available at the same time. (I don't think the UMIK-1 even has an ASIO driver in the first place.) Please stick with Java I/O. 64-bit REW has WASAPI exclusive mode support if needed (it's the devices prefixed with "EXCL:").
3. Please make some screenshots showing the list of playback and recording devices available in REW with Java I/O.

 

[Richx200]

Thank you all for your time and help.

Reading through all your replies, I worked out a solution: instead of trying to figure out an answer to the issue with MiniDsp Flex MOS Optimization, I scraped it and work out an alternative.

All I needed was 4 subs at 6 positions, so why not just pipe the subs through the AVR via the HDMI.

I set the AVR to time and sweep and the DSP Flex to select the sub; problem solved.

Again thank you all for the inspiration