EMU 0404 USB new thread

[Kreukels]

It says "Clock rate selector", which has 6 different settings. If I change it the audio becomes distorted (and frequency of the sound is higher), which I assume means the card's sample rate is increased, but the driver still sends audio in the old sample rate.
I don't know how to make Ubuntu pick a certain sample rate, but looking at it, it seems the driver is able to set the sample rate automatically:

Every applications audio gets mixed and resampled by PulseAudio. Deafault is 44.1khz. If you turn up the slider thus increasing the sampling frequency, the pitch goes up because 44.1khz is replayed in less time. ie. the USB interface expects more samples per second but gets fed the same.

You can tell Pulse to resample at a higher frequency in /etc/pulse/daemon.conf (making it a global setting)
Or perhaps tell Pulse to stop resampling at all and hence decreasing Pulses burden.

[TimCastle]

Can we avoid resampling playback altogether?

I see

hw:CARD=USB,DEV=0
E-MU 0404
Direct hardware device without any conversions
hw:CARD=USB,DEV=1
E-MU 0404
Direct hardware device without any conversions
plughw:CARD=USB,DEV=0
E-MU 0404
Hardware device with all software conversions
plughw:CARD=USB,DEV=1
E-MU 0404
Hardware device with all software conversions

But I can't get ALSA to work with hw:, only plughw

[klotz]

Just checked in Ubuntu Maverick 10.10 and the EMU-1010 works at 96 KHz sampling and the clock rate settings from programs work automatically. So both those patches are indeed working.

Leigh.

[molotov256]

Not sure if this is news to anyone else, but I got my 404USB to work in Ardour for playback and recording in UbuntuStudio 10.10. All I had to do was go through Setup in JACKControl and select the device for input and output.

Not sure why I'd been banging my head up against the wall for so long over that, lol... now I can stop recording in Windows! Yea!

[klotz]

This just in...the EMU-0202 has been replaced by the EMU-0204:


http://www.emu.com/corporate/dealer/...es%20Guide.pdf

http://www.floridamusicco.com/prodde..._interface.htm

[Youman]

I have the new 0204 EMU Soundinterface here on my desk. Unfortuantely it does not work out of the box.


lsusb output is:

Bus 002 Device 003: ID 041e:3f19 Creative Technology, Ltd

Can I make this device to run? I think it is similar to the 0202 device.
I'am not advanced in linux. If you have an sugestion plase eplain it.

Chis

I have added the output of lsusb -v to my post.
Maybe it helps?

[Youman]

Hi,

I have sent the 0204 back. Thats a pity, because I think it sounds a little bit better than the 0202.

[altwazar]

Playback works fine, but microphone to quiet.
When using windows mic work as intendent, in linux (ubuntu 10.10 and others) i can barely hear it.
Does anyone here have the same problem?

[klotz]

EMU-0202 seems to be broken again. Ssound card input fails.

Diagnostics:
alsamixer fails with
"cannot load mixer controls: Invalid argument"

I get this when I turn it on in dmesg:

[  583.562286] usb 1-1.4: new high speed USB device using ehci_hcd and address 9
[  583.662878] 9:1:1: endpoint lacks sample rate attribute bit, cannot set.
[  583.663247] 9:1:2: endpoint lacks sample rate attribute bit, cannot set.
[  583.663617] 9:1:3: endpoint lacks sample rate attribute bit, cannot set.
[  583.663993] 9:1:4: endpoint lacks sample rate attribute bit, cannot set.
[  583.664830] 9:1:5: endpoint lacks sample rate attribute bit, cannot set.
[  583.665253] 9:1:6: endpoint lacks sample rate attribute bit, cannot set.
[  583.665618] 9:1:7: endpoint lacks sample rate attribute bit, cannot set.
[  583.666089] 9:1:8: endpoint lacks sample rate attribute bit, cannot set.
[  583.666492] 9:1:9: endpoint lacks sample rate attribute bit, cannot set.
[  583.666869] 9:1:10: endpoint lacks sample rate attribute bit, cannot set.
[  583.667242] 9:1:11: endpoint lacks sample rate attribute bit, cannot set.
[  583.667994] 9:2:1: endpoint lacks sample rate attribute bit, cannot set.
[  583.668364] 9:2:2: endpoint lacks sample rate attribute bit, cannot set.
[  583.668742] 9:2:3: endpoint lacks sample rate attribute bit, cannot set.
[  583.669112] 9:2:4: endpoint lacks sample rate attribute bit, cannot set.
[  583.669611] 9:2:5: endpoint lacks sample rate attribute bit, cannot set.
[  583.669986] 9:2:6: endpoint lacks sample rate attribute bit, cannot set.
[  583.670499] 9:2:7: endpoint lacks sample rate attribute bit, cannot set.
[  583.670861] 9:2:8: endpoint lacks sample rate attribute bit, cannot set.
[  583.671369] 9:2:9: endpoint lacks sample rate attribute bit, cannot set.
[  583.671859] 9:2:10: endpoint lacks sample rate attribute bit, cannot set.
[  583.672233] 9:2:11: endpoint lacks sample rate attribute bit, cannot set.
[  583.695621] 9:1:1: endpoint lacks sample rate attribute bit, cannot set.

Eventually I'll get (here with 10 instead of 9, since I've repeated the test)

[  784.732753] 10:2:1: usb_set_interface failed
[  789.726801] 10:2:1: usb_set_interface failed
[  794.720885] 10:2:1: usb_set_interface failed
[  799.715979] 10:2:1: usb_set_interface failed
[  804.709091] 10:2:1: usb_set_interface failed
[  809.786982] 10:2:1: usb_set_interface failed
[  814.780645] 10:2:1: usb_set_interface failed
[  819.775501] 10:2:1: usb_set_interface failed
[  824.768466] 10:2:1: usb_set_interface failed
[  829.762546] 10:2:1: usb_set_interface failed
[  835.880334] 10:2:1: usb_set_interface failed
[  840.873402] 10:2:1: usb_set_interface failed
[  845.867485] 10:2:1: usb_set_interface failed
[  850.861581] 10:2:1: usb_set_interface failed

I'm on 2.6.35-26-generic-pae build from Ubuntu Maverick 10.10.

I wonder if this change is somehow related, either in that it has, or perhaps hasn't, happened.

The Audio Class v2 support code in 2.6.35 added checks for the
bInterfaceProtocol field. However, there are devices (usually those
detected by vendor-specific quirks) that do not have one of the
predefined values in this field, which made the driver reject them.

To fix this regression, restore the old behaviour, i.e., assume that
a device with an unknown bInterfaceProtocol field (other than
UAC_VERSION_2) has more or less UAC-v1-compatible descriptors.

http://amailbox.org/mailarchive/linu...0/9/18/4621391

[klotz]

OK, moved some PCI cards around and I now get EMU-0202 working again.
The "lacks attribute bit" is still there but seems to be a warning.
I also validated on a fresh upgrade from 10.04 to 10.10 on a laptop.
Leigh.

EDIT: OK, broken again. doing apt-get remove pulseaudio and reboot seems to make it more stable.