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Comments for E-MU 0404 USB mod wiki

Current Discussion: Main discussion

  1.   #11
    FixMetal's Avatar
    diyAudio Member
    I discovered some more stuff to be added in the wiki.
    I traced the entire post DAC section (HP included). The muting trannies which are in output sections are possibly n channel jfet, but they are not really of much help. Plus they seems to be a weak point. I got an EMU0404 which showed uber low output on any jack and it was all jfet's fault. Once I removed them, I got back the sound.
    Hope mod will open the wiki again for editing (I added some stuff, still in approval though).
    Best,

    Simone
     
  2.   #12
    kele1975's Avatar
    diyAudio Member
    Hi guys.
    Is it possible to drive signal from DAC chip (pins 20.-23.) directly to preamplifier, or it's necessary to add some kind of buffer?
    Having a real schematic would be very helpful.
    Thanks
     
  3.   #13
    FixMetal's Avatar
    diyAudio Member
    [QUOTE=kele1975;3487801]Hi guys.
    Is it possible to drive signal from DAC chip (pins 20.-23.) directly to preamplifier, or it's necessary to add some kind of buffer?
    Having a real schematic would be very helpful.
    Thanks[/QUOTE]

    Just updated (and fixed links) of the wiki. Check it out ;)
     
  4.   #14
    Tenson's Avatar
    diyAudio Member
    Hi,

    Can anybody tell me which op-amps are responsible for the line input? I see a mixture of NE5532 and NJM2068 so I don't know which are for line and which are for hi-Z and Mic.

    A schematic for the input section would be valuable.
     
  5.   #15
    Trileru's Avatar
    diyAudio Member
    I have a good deal on this board but I was wondering if the drivers for mac are ok.
    I'm using Mavericks. I've seen a post somewhere on the internet saying that in Mavericks the board works with all options. But I'd like to be sure.
     
  6.   #16
    iko's Avatar
    iko is offline
    diyAudio Moderator
    No idea. If you can get it for real cheap, I'd say go for it; you can always get an old windows laptop for little $ and use it. My friend found a brand new one for $30. It was a store display item and they wanted to get rid of it. For that kind of money it's a no brainer.
     
  7.   #17
    Alfanijs's Avatar
    diyAudio Member
    Hi all, following this thread since I bought one 3 years ago, only just soldered a power supply and hooked it up for the 1st time (busy with other things...).
    After struggling a lot with USB drivers, the 1.40 beta drivers seem to work flawlessly now on AMD Win7 64-bit. So now I can start modding :).

    Timing is perfect as there is renewed interest from others as well. Fellow member [URL="http://www.diyaudio.com/forums/members/misterzu.html"]misterzu[/URL] has been upgrading mainly the input side, done before/after measurements, with a full description and schematics, and it looks really good.

    Look [URL="http://www.diyaudio.com/forums/digital-line-level/113370-e-mu-0404-usb-modification-13.html"]here:[/URL]
    Things get interesting from page 13 onwards, summary is on pages 18/19.

    Probably I'll be back with questions later ;)
     
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