Getting around the limitations of JavaSound on OS X - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #31 of 171 Old 01-02-14, 10:22 AM Thread Starter
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Re: Getting around the limitations of JavaSound on OS X

REW supports 96k/24-bit sampling, but only when using ASIO drivers so need Windows for that, sorry.
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post #32 of 171 Old 01-24-14, 08:20 AM
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Re: Getting around the limitations of JavaSound on OS X

I have a Umik-1 here connected to my mac mini and I was wondering if I can measure an accurate absolute SPL level now ?

If I start the REW software on OSX it is advised to use Soundflower, LineIn and Audio Midi Setup.
I noticed that the following settings influenced the SPL readout:
-1- System Preferences - Sound - Soundflower (2ch) - Input volume
-2- Audio Midi Setup - Umik-1 - Sliders
-3- Audio Midi Setup - Soundflower - Input - Sliders
-4- Audio Midi Setup - Soundflower - Output - Sliders

In the REW software -2- is advised to be set at 0 dB

Does anybody know what are the right settings for -1- ; -3- ; -4- to have the right readout of SPL in the Umik-1?
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post #33 of 171 Old 01-24-14, 05:02 PM Thread Starter
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Re: Getting around the limitations of JavaSound on OS X

It is pretty tricky on OS X as REW cannot access any volume control settings so cannot compensate for them, ideally all gains in the input path should be set to 0 dB.
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post #34 of 171 Old 01-25-14, 03:52 PM
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Re: Getting around the limitations of JavaSound on OS X

Hello, first of all I apologize for all my possible errors since English is not my language.
I just downloaded the beta version for macosx but when I launch it the Mac says it is corrupted and the system asks me if I want to put it in the trash.
What should I do what is the link that I have to choose?
Sorry if i'm in the wrong 3ad...
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post #35 of 171 Old 01-25-14, 04:53 PM
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Re: Getting around the limitations of JavaSound on OS X

That type of OSX problem is usually because of this guy ;




Last edited by EarlK; 01-25-14 at 05:20 PM.
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post #36 of 171 Old 01-25-14, 05:19 PM
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Re: Getting around the limitations of JavaSound on OS X

No isn't this the problem.
It's not a gatekeeper issue. I can open (ctr->open) a file and launch it.
Now, when I try to launch this REW version, the system says to me "the file is damaged and cannot be open"
P.S. I don't know English but I know the Mac since 1988
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post #37 of 171 Old 01-25-14, 05:43 PM
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Re: Getting around the limitations of JavaSound on OS X

Quote:
Esprit wrote: View Post
No isn't this the problem.
It's not a gatekeeper issue. I can open (ctr->open) a file and launch it.
Now, when I try to launch this REW version, the system says to me "the file is damaged and cannot be open"
P.S. I don't know English but I know the Mac since 1988
Regardless of how long you have been around Macs, I would suggest that you use the advanced search function ( for this forum ) .

- Look for posts from user JohnM & search for the word gatekeeper .
- Display the search results as threads ( & then follow the trail of bread-crumbs to one answer ).

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post #38 of 171 Old 01-25-14, 05:58 PM
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Re: Getting around the limitations of JavaSound on OS X

Found this: http://www.hometheatershack.com/foru...tml#post537659

Thanks EarlK you deserve a beer!
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post #39 of 171 Old 01-26-14, 05:18 PM
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Re: Getting around the limitations of JavaSound on OS X

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It is pretty tricky on OS X as REW cannot access any volume control settings so cannot compensate for them, ideally all gains in the input path should be set to 0 dB.
Thanks John.

If in Audio Devices - Soundflower (2ch) input is at 0 dB (see screenshot) there is no measurement at all.
Also in in Preferences - Sound Input and Output there is no setting in dB, just percentage.

I guess I'm not the only one with OSX and Umik-1 who wants absolute SPL level, do I understand correctly that this is not possible?

I also received no answer from the minidsp help desk, can someone point me in the right direction for support on this issue or is this the wrong thread?

Is it still necessary to use Soundflower and LineIn at this point in time ?

I tried searching the forum but it is hard to find the right info, I also read the thread about the Umik-1 but no luck there also.

Would it make more sense to use Windows as a virtual machine in OSX, can I have absolute SPL then?

.
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post #40 of 171 Old 01-26-14, 05:39 PM Thread Starter
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Re: Getting around the limitations of JavaSound on OS X

It should work fine using Windows in a VM.

Soundflower and LineIn are required for OSX, MiniDSP provide setup help in their application notes: http://www.minidsp.com/applications/...c-measurements

For the Soundflower setting the displayed dB value doesn't look meaningful - 0 dB should mean unity gain, what does the dB figure show if the level is set to the maximum? It may be that full/100% is unity gain.

If you have an external SPL meter you can calibrate REW against that as another route to correct SPL values.
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