Home Theater Forum and Systems banner
1 - 4 of 4 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter · #1 · (Edited)
Hi all,

New here. It's great to find a freeware program such as REW, but I've got a problem.

Firstly the program mostly seems to run quite smoothly. I've got Java updated. (J2SE 5.0 [32bit], Java SE 6, J2SE 5.0 [64bit])

I use a Mbox-2 for the output device, and I can play a clean, audible tone through it, but for input I want to use my Zoom H4n Handy Recorder (Mic Audio device), which can operate via usb.

Problem: I've tried to 'Measure' my devices before Calibration, but neither my Macbook Pro's internal Mic (Built-in Microphone), nor the recognized H4n ('H4') indicate signal. Strangely, I can still select them in the 'Input Device' pull down list. The input meters are empty, and only the output meter shows a level when the tone is played.


Also, I've found a site (sorry I'm not allowed to post a link yet) that addresses ASIO drivers, if that matters. The page is entitled "Java Sound Resources: FAQ: Miscellaneous", and it addresses the compatibility of ASIO drivers:

Yes, there is an open source implementation of a MixerProvider based on the ASIO driver API. The implementation was written by Manuel Esparza as part of his master's thesis. See jsasio binary and source code.

However, while I don't understand how to install those code files, I don't think it's necessary anyway, since the Mac internal mic probably doesn't need that driver to work. So drivers may not be a problem. Just thought I'd mention it in case it bears relevance somewhere though.


Any ideas how I can get signal? There's no necessity for gain controls as far as I know, both inputs should at least give me a small signal; I'm very surprised that there's nothing at all. I've seen similar threads but thought this was better to be posted here.

Thanks, any help much appreciated!
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #3 · (Edited)
Hey Earl,

Thanks for the reply. At first it seemed like bad news, because almost nothing of what you suggested gave any signal, UNTIL I went to the Mac 'System Preferences' -> 'Sound' and selected the Internal-Mic Input, tested it there (signal detected; no surprise), then went back inside REW, refreshed the input (reselected Built-In Microphone and/or pressed 'Measure') and then suddenly I started picking up signal.

However, after so much fiddling and trial and error, I kinda got lost as to what was influencing or sourcing the signal! It turns out that the settings work best when they're set as default I/O in Mac System Preferences first. Actually, below I'll explain why it appears that unless the input device is set to Default in the Mac preferences, it won't work at all!

I can see that it is explained in the small help box at the bottom of the REW 'Settings' window that it might be ideal to be using the system defaults. But I found that selecting specific devices in the pull-down menu does not work! I can select almost every Input device and each time it will just source the signal from what I have set as Default Input in my Mac preferences. This might have something to do with the second pull-down menu, which is always unchangeably labeled 'Default Input'. If it does, there seems to be a bug; the settings seem redundant and since they're running straight from my Mac Sound preferences, there may as well be no Input settings displayed at all.

:blink:

Weird. So I must've had my default Mac Input settings set to 'Line In' before, because I had no Line connection/signal at the time.

Well at least I can work around it and otherwise still use the program properly! :D


I'll keep posted if anything other issue arises.

Thanks again and I hope that made sense.
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #5 · (Edited)
...it looks to me like you have some redundancy here. The Zoom is a USB audio interface in itself, so you don’t need both it and the M-box. HOWEVER, since the Zoom has a headphone/line output, it could function as your mic feeding a signal to the M-box.

But either way, using the Zoom as your mic presents problems. Unless you have a calibration file for it, your measurements won’t be accurate.

Regards,
Wayne
REW says the calibration is for the soundcard - I thought this means the output device? I am not using the H4n as an output device, I'm using it as a Mic (input) and as I said in the above post, I've found out how to use both the H4n and the M-box; I set them as default I/O in the Mac Preferences first. I'm not sure what the problems could be; please excuse me if I sound naive. I'm not seeing the purpose of needing a Line signal to the M-Box, or needing it to be connected to the M-Box Inputs (what exactly will be calibrated then, anyway?).

Thanks.
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #7 · (Edited)
I understand your connection scheme. It just doesn’t make any sense. From what I can see, the Zoom is a USB audio interface w/ on-board mics. The M-box is also a USB audio interface. What’s the M-box doing for you that the Zoom isn’t? The Zoom should be able to do everything (unless you can’t USB it directly into the computer because it doesn’t “play well” with Macs).
The M-Box is my output device, so it is used to play sound - which transfers through to my studio monitors. The Zoom can't do this; it only has a basic built-in playback speaker but I ain't using that! I use the Zoom USB because it's the only way I can get a good Mic signal to the computer. Why can't this work? As far as I know, the calibration is for the Output device, isn't it?

Thanks Wayne.
 
1 - 4 of 4 Posts
Top