REW and Edirol UA-1EX: Anyone get this to work on a mac?

**09-09-07, 08:02 PM**

Hello,

I've got mac OS X version 10.4.10 running on Intel, and an Edirol UA-1EX.

I'm trying to get REW to work, but I am not having any luck. The drivers are installed properly, but REW is not working. Here is what is happening:

$ java -jar RoomEQ_Wizard_obf.jar
Sep 9, 2007 7:59:27 PM roomeqwizard.RoomEQ_Wizard main
INFO: Room EQ Wizard started
Sep 9, 2007 7:59:30 PM roomeqwizard.O A
SEVERE: Exception trying to open record device
javax.sound.sampled.LineUnavailableException: Unexpected Error

At this time, a window pops up that says "Input device error." I can still go into the program, but if I try and measure the sound card response, it tells me "Unable to take SPL reading: SPL meter audio input not available"

That is as far as I can get.

Can anyone help out with this?

Thank you

**JohnM** · **09-10-07, 02:10 AM**

On the Mac REW can only access the on-board audio input as Apple do not provide access to other input devices via the general JavaSound interface. You need to leave the input set as default and have the sample rate set to 44.1kHz. For Midi access you will need to use the plumstone drivers from http://www.mandolane.co.uk/

**09-10-07, 09:42 AM**

JohnM,

Thanks for replying, great software. I paid $150 for ETF (RplusD), but I use yours because the GUI is a lot better, and it does exactly what I need without the complicated stuff I don't understand. I use it to measure my entire car stereo (Dynaudio drivers, Alpine F1, modded for car use Behringer DCX) to set the DCX as well as my 2 channel home stereo (Dynaudios, Conrad Johnson) to help place speakers, and panels / bass traps.

Anyway, I would really like to use my Mac laptop to do my measurements. I'm not sure that I quite understand your answer, though. Are you saying that I need to use the onboard audio in my Macbook to use REW, so in other words, I will not be able to use the Edirol at all?

On the Mac REW can only access the on-board audio input as Apple do not provide access to other input devices via the general JavaSound interface. You need to leave the input set as default and have the sample rate set to 44.1kHz. For Midi access you will need to use the plumstone drivers from http://www.mandolane.co.uk/

**JohnM** · **09-11-07, 04:16 AM**

You will need to use the onboard audio input, but you can use other devices for audio output by selecting them as the default audio device in the Mac's audio settings.

**Fred33** · **09-11-07, 09:02 AM**

Thanks for the thread. I never knew my Mac could do that.

**09-11-07, 09:31 AM**

Thanks John,

I guess all I need is a 3.5mm to RCA stereo adapter

**09-18-07, 06:17 PM**

Hi John,

I'm trying to get REW to work on my Macbook. Now I'm not using the Edirol card at all, I'm just trying to use the onboard audio. I have 3.5mm to RCA adapater for the input and output, and I am trying to measure the system audio response... but the output meter in the test is coming up blank.

Has anyone tested REW on a mac using the onboard audio for both input and output?

Thanks

**JohnM** · **09-19-07, 04:05 AM**

Well me for one :-) I test on an Intel Mac Mini using onboard audio.

**09-19-07, 09:24 AM**

Thanks John. Do you have any ideas of things I can look into on my Macbook to get it to work? I've got a headphone -> RCA adapter plugged into both the line in and the line out, but when I test the sound card, the output side is coming up blank in the meter.

**JohnM** · **09-20-07, 04:42 AM**

First thing would be to check you get audio out of the headphone jack OK, e.g. when playing some music. If that works then it should mean the onboard audio is selected as the output device in the Mac's audio settings. Next check that REW is set to use 44.1kHz on the soundcard tab of the settings and try using the REW signal generator to play a 1kHz tone and see if that comes out the headphone jack OK.

**thxgoon** · **11-06-07, 09:09 PM**

Quote:

JohnM wrote:

Well me for one :-) I test on an Intel Mac Mini using onboard audio.

Hey John, have you had any problems with stability issues? ie crashing after just a few measurments? Do you know of a good way to stop this from happening? Thanks!

**JohnM** · **11-07-07, 07:45 PM**

I've not experienced any crashes on the Mac Mini, they seem to happen on PPC platforms rather than Intel.

**thxgoon** · **11-08-07, 02:31 AM**

Strange... I just bought a Macbook Pro and get crashes pretty consistently.

I'll try your suggestion from the other thread, hopefully it works. From the measurements I've made so far RoomEQ seems invaluable to serious hometheater tweakers.

**thrang** · **03-12-08, 12:29 PM**

ok, so I just purchased a UA-1EX yesterday for my MacBook Pro setup and of course cannot even calibrate it following the loopback method in the general instructions - I came across this thread and am trying to understand what to do to calibrate. Can someone post a step-by-step as to how to connect the Edirol to the Mac to calibrate and use it. It seems I cannot do the loopback calibration based on what I'm reading here and my experiences (I get either a clipped or too low db reading, and the sensitivity of the Edirol volume control seems to go from overload to no signal at all)

Thanks

**JohnM** · **03-12-08, 01:05 PM**

Are you running Leopard? That should allow you to access the Edirol's inputs by setting the card as UA-1EX as the default audio input and picking the line input - don't try using the Edirol's mic input, that will have too much gain. Set the dip switches for 44.1kHz. Set the input monitor dip switch to auto(off). Set the recording source dip switch to analog.

**thrang** · **03-12-08, 01:16 PM**

Thanks for the reply, but not fully following you.

Yes, I'm using Leopard.

So what do I do first - go into Apple's Midi Utility - what do I set for each of the pop-ups?

In REW, do I leave the Soundcard settings as Default or Choose the UA-EX1?

I'm using the Line in, not the mic. When I set the dip switch to Auto, there is no sound.

Is the idea that under leopard, with the right settings, I'm connected to the Mac via USB only and connecting the loopback cable as in the instructions?

Thanks

**thrang** · **03-12-08, 01:47 PM**

ok, i restarted, and did as you instructed. It's a little further along, but I'm getting a very low signal error
(highest is -90 db)

Edirol is connected via USB, right channel RCA loopback on Edirol - REC Source Analog - Input Monitor AUTO - Apple Midi set to UA-1EX as default Input, UA-1EX set as default input in REW, 44 khz in REW.....

Hmmm....

**JohnM** · **03-12-08, 02:14 PM**

Try connecting the UA-1EX output to the on-board input on the MacBook pro in case Leopard hasn't fixed the bug of the input signal fed to Java always being the on-board input regardless of the default input setting.

**thrang** · **03-12-08, 02:19 PM**

Ok, I did this, and I still get the low signal error, through it's now reading a peack of around -55 as opposed to -90 or so....

Thanks for helping on this

**JohnM** · **03-12-08, 02:21 PM**

Best check the output side of the UA-1EX is set up correctly and you are able to generate test signals. If you connect the output to an input on your system can you hear the signals you generate OK through your speakers?

**thrang** · **03-12-08, 02:31 PM**

Yes, I hear the sweept tones - I connected the RCA outs on the Edirol to the AVRs front panel inputs, and selected that input.

I looped the right again, and still getting about -45 db low signal warning- volume knob on edirol makes no difference, though I suspect it shouldn't

**thrang** · **03-12-08, 02:36 PM**

Here's the graph....

**thrang** · **03-12-08, 03:10 PM**

If I choose the "Java Sound Audio Engine" as the output device, it seems to do a proper calibration.

Now, was I supposed to do that? I didn't see that in the instructions

Also, the instructions say to press the "Make Cal" button in the soundcard settings. This is greyed out unless I check the "Use Left channel as Calibration reference" option - am I supposed to do this?

Thanks

**JohnM** · **03-12-08, 03:40 PM**

The REW Output device can be left as default (input device also), as you hear the test tones OK the output is working as it should. On the input side did you change the default audio input on the powerbook preferences to the on-board line in?

**thrang** · **03-12-08, 04:34 PM**

I'm lost, but thanks anyway

Advertisement