Help, No Input mixers available - error

[equal]

Hi,

Room EQ looks like a great app and this looks like a very helpful forum, but I'm having great difficulty getting REW to do anything.

When I boot it I get the error
No Input mixers available
supporting PCM_SIGNED 44100.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian

I've tried setting the 'Output Device And Output' to default and also to my soundcard (Fireface) but no luck.

I'm running REW 4.11 and latest Java
Dell XPS 420, Vista SP1, Core 2 Duo 3.1GHz, 4 G Ram, RME Fireface 400 Soundcard.

If I click the big 'Measure' button I get the warning 'SPL Meter Audio Input Not Available'
So it's just not seeing my soundcard

I've searched the forums and no one with the same error message has sorted it out yet, and they mostly seem to be on Macs.

It's a modern PC with Pro soundcard which I'm really hoping should work, has anyone got any ideas?

Also I have an omni mic (especially for measuring rooms), but no SPL meter, is this okay?

Many thanks

Equal

[Wayne A. Pflughaupt]

Wow, that's a pricey sound card...

Also I have an omni mic (especially for measuring rooms), but no SPL meter, is this okay?

Not really. The SPL meter is needed to calibrate REW to a 75 dB reference. Unless you are positive the mic has ruler-flat response, a calibration file will be needed. Otherwise the reading REW displays will be a combination of both in-room response, and the mic's.

Regards,
Wayne

[equal]

Hi Wayne,

Thanks for the info. I've just found my mic won't work with my soundcard, only with the Rane EQ it came with, and with Room EQ Wizard not working for me I think I'll skip buying an SPL meter.

Thanks for your reply though.

[JohnM]

You probably don't have any WDM drivers loaded for your sound card. Java apps (like REW) access the soundcards via Windows so need WDM drivers for any card you want to use.

[equal]

Hi John,

Many thanks for your Room EQ program.
It comes with standard windows drivers (W2k, XP, XP64, Vista, Vista64), how can I tell if they're WDM drivers?
...Just found it...at the bottom of this page...
en_products_fireface_400 . php
(it wont' let me post a URL so this is the page at RMEs site)
It says it has WMD drivers

Many thanks John.

[JohnM]

Have you tried selecting the 48kHz sample rate (on the REW soundcard settings page)?

[equal]

Yes that was the first thing I tried.

Thanks John

[JohnM]

Bit stumped then. You could try the V4.00 or V3.29 versions to see if either of those copes better, they are available on the REW page.

[equal]

Okay thanks John, I'll try v4 and let you know

[equal]

I'm afraid it doesn't work for me either.
It's a real shame, as it looks like a great app.

Many thanks

[equal]

I should have added...
V4 gives me the same 'No Input Mixers' error, whereas V3.29 doesn't complain, but it doesn't let me choose a soundcard/ device, it is blank.

RME are noted for making stable drivers and my soundcard (Fireface 400) has been around for a few years now.

Also I've just found a program called x.exe in my User folder on Vista along with RoomEQ java error logs. Is this program x.exe safe/ part of RoomEQ/ java?

Many thanks

[JohnM]

There would be an x.log file from the installer, don't know of an x.exe file.

[JohnM]

You may also want to check that your soundcard is not set to only offer 96kHz (or 88.2kHz) audio channels to apps, sometimes there is a setting in the soundcard's control panel to force the sample rate and/or sample depth.

[equal]

It is set to 44.1 and the only sample rate I use.

Thanks again John.

[JohnM]

If you click the "Generate debug file" button on the REW soundcard settings page it generates a file with some soundcard info, worth doing that and attaching the file here. I'm not confident it will identify the issue, but worth a try. Also if your PC has a built-in soundcard with a line input you can use that, don't need a high quality card for good results.