[LAU] Horrible number of xruns in Jack (Emu card)

Darren Landrum darren.landrum at sbcglobal.net
Mon Jan 28 20:20:26 EST 2008

bradley newton haug wrote:
> I run the emu 1212m successfully on 64 bit linux.  Some of the subcards 
> (hw0.1 etc) have problems with 44.1, I use 48 so it's not an issue for 
> me.  Make sure your sync is set correctly in alsamixer 
> (adat,spdif,int44) and play with using different settings for hardware.. 
> hw0,1, 0,0 0,3 etc.. hw:0 will *not* work for recording.
> the card support is problematic and I don't recommend it.  I had to 
> patch 1.15 to get it working correctly and for the life of me I cannot 
> find where I got the patches.  The original author of the patch hasn't 
> done any major work on it for over a year.  Check the alsa dev wiki page 
> on emu10k/emu on the discussion page, thats as much documentation as 
> anyone has collected on the card.
> taken from:
> http://www.alsa-project.org/main/index.php/Matrix_Talk:Module-emu10k1
> MajorBytes majorbytes.com <http://majorbytes.com> -- >> music site http://myspace.com/allenwarrenmusic
> -- host-69-146-29-10.static.bresnan.net <http://host-69-146-29-10.static.bresnan.net> (2007-05-29 18:36:16)
> You use jack, right? Then you have to set which alsa device will be used for capture and playback (the simplest way is to use qjackctl for that) . 
> There are several possibilities on e-mu. Let's say e-mu is the only card in your system, so it has index 0.
>  Then hw:0,0 is stereo, 16bit only. Do not use it for capture. However, it's probably the best device for playback for now, 
> because multichannel playback is currently broken. hw:0,2 is multichannel capture capable of 8 channles at 24 bit resolution. 
> Always use that for capture. hw:0,3 is multichannel playback of 16 channels at 16bit. It does not work reliably a need to be reworked (24 bit, proper sync at 44kHz, etc..).
>  So most reliable setup for e-mu cards is hw:0,2 for capture and hw:0,0 for playback (you can use them simultaneously).
> Now about the routing. There are a lot of ports called "DSP <number>" it he mixer. At first look it's rather confusing. 
> Actually, there are two groups od "DSP" ports. One group is for input (DSP 0 to DSP 15, hexadecimal numbering! ) and it's the first bunch 
> of "DSP" from left in alsamixer (bottom line). The other group is for playback (DSP 0 to DSP 31, decimal numbering, OMG!!!).
>  First 8 inputs (DSP 0 - DSP 7) are used for capture (you will see and hear them in the jack). Other inputs are mapped directly 
> onto their output brothers with same number (don't forget, that inputs are hexadecimal, so DSP A is mapped to DSP 10, DSP 12 to DSP 18, etc..). 
> Otput works same, so if you use hw:0,0 (2 channels) for playback, then you will hear them on outputs DSP 0 and DSP 1.
> this isn't a card for a beginner, but with coaxing it does work.
> best
> bradley newton haug

I had bought this card back when I thought I was going to stick with 
Windows and get the EmulatorX2 sampler to go with it. Now that that 
can't happen due to various reasons, I might have to trade this card up 
for something else. I hear the various M-Audio options all work quite 
well in Linux.

-- Darren

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