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  Topic Review (Newest First)
01-14-17 03:02 PM
Ozzie Z
Re: Level too low -95dB

Quote:
EarlK wrote: View Post
Sorry Ozzie

I had to dash to work ( & therefore left you hanging / aren't forums just grand ? ) .

I was hoping the clues given within my first posts (to your input dilemma) would allow you to "puzzle-out the solution" ( & so give to you the satisfaction of arriving at your own "a-ha moment" ) .

Clearly John ( ie; jtalden ) saw you struggling & offered the solution on a platter ( which still managed to give you pause ).

FYI, REW is pretty complicated software, and its made more so by combining it's steep learning curve with first use of a soundcard ( that's not a recommended situation by me if at all avoidable ).



Yes your REW output & record levels are fine and you can move onto the next step of setting up REW's SPL Meter.


Thankyou.

I appreciate all the support one can get.
01-13-17 08:47 AM
EarlK
Re: Level too low -95dB

Sorry Ozzie

I had to dash to work ( & therefore left you hanging / aren't forums just grand ? ) .

I was hoping the clues given within my first posts (to your input dilemma) would allow you to "puzzle-out the solution" ( & so give to you the satisfaction of arriving at your own "a-ha moment" ) .

Clearly John ( ie; jtalden ) saw you struggling & offered the solution on a platter ( which still managed to give you pause ).

FYI, REW is pretty complicated software, and its made more so by combining it's steep learning curve with first use of a soundcard ( that's not a recommended situation by me if at all avoidable ).

Quote:
Ozzie wrote:
Are these results okay in your opinion for me to now to do a SPL calibration?
Yes your REW output & record levels are fine and you can move onto the next step of setting up REW's SPL Meter.


01-13-17 01:55 AM
Ozzie Z
Re: Level too low -95dB

Quote:
jtalden wrote: View Post
ASIO is the better choice for that setup in my opinion, but Java will work just fine also. We should be sure to avoid any red flashing on the Solo input as that means the signal is being clipped. A setting of 12:00 O'clock on the Solo input gain as shown in Post 3 is okay. A setting between 12 and 3 O'clock is a good setting for the Solo. The reported headroom of -22 dB during a measurement is good also. It's pretty normal to take measurements with the measurement headroom reported somewhere between -28 to -18 dB.
If the REW SPL meter is calibrated per the REW Help instructions the REW charts will show the correct SPL level. If the REW SPL meter is not calibrated then the SPL level on the charts may be shifted higher or lower than actual, but the shape of the curve is still correct and the data is useful. Be careful if the REW SPL meter calibration has not been done - a low reading on the chart may occur when the actual level is much higher! That may be the current situation.
Hi mate,

Just so we are on the same page I have included the following photos for clarity.

The first photo refers to CHECK LEVEL. The reading comes up as -22dB as depicted.

Are you saying this is a headroom check. I was of the understanding when you check level that it would be 75dB as a result. Am I wrong here?

The second photo refers to START MEASURING which is the button next to check level.

In that photo it shows a Headroom figure of 10.5dB.

The photo after that is a graph that comes right after that figure.

Are these results okay in your opinion for me to now to do a SPL calibration?

Cheers and thankyou.
01-12-17 11:40 PM
jtalden
Re: Level too low -95dB

ASIO is the better choice for that setup in my opinion, but Java will work just fine also. We should be sure to avoid any red flashing on the Solo input as that means the signal is being clipped. A setting of 12:00 O'clock on the Solo input gain as shown in Post 3 is okay. A setting between 12 and 3 O'clock is a good setting for the Solo. The reported headroom of -22 dB during a measurement is good also. It's pretty normal to take measurements with the measurement headroom reported somewhere between -28 to -18 dB.
If the REW SPL meter is calibrated per the REW Help instructions the REW charts will show the correct SPL level. If the REW SPL meter is not calibrated then the SPL level on the charts may be shifted higher or lower than actual, but the shape of the curve is still correct and the data is useful. Be careful if the REW SPL meter calibration has not been done - a low reading on the chart may occur when the actual level is much higher! That may be the current situation.
01-12-17 10:07 PM
Ozzie Z
Re: Level too low -95dB

Quote:
jtalden wrote: View Post
I may be confused.
The image in post 3 shows the input channel to be 'right'.
The image in Post 6 does not show which channel is chosen as it is obscured by the dropdown above.
My post clearly indicates the input is to be set to channel 1 / 'Left".
My post did not mention the output as you were successfully getting output from your chosen output channel i.e. 'Right.
My thought was:
Input = Left
Output = right (as shown)

I you indeed have left chosen for input now (instead of the right channel as shown in post 3) then the problem must be elsewhere.
Hi mate,

Good pickup.

I have made some progress although still not there.

What I have now done is as you said. The input is set to LEFT and the output is set to RIGHT.

I have experimented with ASIO as the drive instead of Java and I now get the following result:

Level Okay -22db.

Now I know the sound getting outputted from the speaker is well over that so whilst the original problem of "level too low -95db" has
been improved dramatically to an ok status I know that the speakers is giving sound which should be picked up more than what is happening.

What do you think?

I have kept input and output devices as Focusrite USB audio.

The mic is a metre away from the speaker and horizontal to the ground.

Both horizontal and vertical positioning gives the same figure.

I am experimenting with gain on the Focusrite where its levelled to just before clipping( flashing red on the dial) and turned the volume up on the minidsp
without the HF noise coming through if its too loud.

Cheers and thanks for your help.
01-12-17 03:21 PM
jtalden
Re: Level too low -95dB

I may be confused.
The image in post 3 shows the input channel to be 'right'.
The image in Post 6 does not show which channel is chosen as it is obscured by the dropdown above.
My post clearly indicates the input is to be set to channel 1 / 'Left".
My post did not mention the output as you were successfully getting output from your chosen output channel i.e. 'Right.
My thought was:
Input = Left
Output = right (as shown)

I you indeed have left chosen for input now (instead of the right channel as shown in post 3) then the problem must be elsewhere.
01-12-17 03:00 PM
Ozzie Z
Re: Level too low -95dB

Quote:
jtalden wrote: View Post
Ozzie,
In REW Soundcard/preferences it shows 'right' as input channel for the REW input.
Channel 1 is the left channel and channel 2 is the right channel on the Solo.
The mic is plugged into channel 1 - the left input channel on the Solo.

Select the 'left' input channel in REW soundcard/preferences and see if that helps.
Hi mate just to be clear if you look at the included photo in Preferences there is Input Device and Output device.

I have set that to Focusrite for BOTH.

Underneath that there is Input and Output.

I have set BOTH to left.

Are you saying I should set just Input to left and and leave output to left as well?

I have done this and I now get NO sound coming out of my magnepan speakers and the level is once again too low although this time
it is approximately -65dB.

I am at a loss as to what to do. Could it be that the focusrite and behringer simply dont couple with the laptop I am using?

I have gone into the sound card settings on the laptop and set it to focusrite. I have basically run out of options.

Thanks for your help.
01-12-17 09:12 AM
jtalden
Re: Level too low -95dB

Ozzie,
In REW Soundcard/preferences it shows 'right' as input channel for the REW input.
Channel 1 is the left channel and channel 2 is the right channel on the Solo.
The mic is plugged into channel 1 - the left input channel on the Solo.

Select the 'left' input channel in REW soundcard/preferences and see if that helps.
01-12-17 06:32 AM
Ozzie Z
Re: Level too low -95dB

Earl,

Here is a photo I just took of the available options for input device.

I have tried them all but to no avail.

If I choose the bottom option that is microphone the check level comes out to -45dB. Obviously still too low.
01-12-17 06:16 AM
Ozzie Z
Re: Level too low -95dB

Hi mate,

Sorry but you have lost me.

At the moment I have as the photo suggests button clicked to line and NOT instrument since I am using the mic and NOT a guitar.

I have the monitor switched to off.

I've been onto this for the last couple of days and just cant seem to see the forest from the trees.

I tried using the ASIO driver instead of Java and got no sound out of the speakers.

With the current setup I have sound coming out of the speakers. The mic is definately picking up but its not routing properly to REW.

I think from what you say I need to go back into the REW preferences and see if I can make a change there.

Thats why I included the photo so everyone could visually see what I was doing as opposed to saying something which didnt reflect what was really happening.

Unfortunately right now not having that doh experience.

Thanks for responding. I appreciate it. I know I am doing something wrong but cant figure it out at the minute.
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