CM6631 usb audio interface .... any good?

Jump to Latest
Q

quantran

Member
2004-04-27 10:15 am
Hanoi
  • #563
    I think this kind of conclusion seems lack of context. Is everything else equal i.e. XO used, power supplies, pcb layout? How bad is bad? I have used both xmos and 6631. They both do a good job. In one case the xmos fed by a lenovo laptop sounded much better than an akm spdif receiver on the same DAC. On thic DAC with akm chip the high is clean and detail.

    My observation in most digital equipment the low is less affected by jitter. My assumption is that at low frquency there are alot more data points for each cycle of sine wave. If the low is bad I would suspect the DAC power supply or analog stage.
     
    noSmoking

    noSmoking

    Member
    2010-05-07 6:46 pm
    Texas
  • #566
    I bought several dacs from the bay Usb inputs,I found a big difference in power supplies when using a usb powered dac,I built a stand alone and it made a difference in fidelity,sonics the one I built used a lm317 nothing special just like the data sheet ,Try it ,I will make a SALAS 5 volt PS and see if it's a better change.
    Has anyone tried this ?
    Post up the results or opinion !
    Sure I can Hear YA! LOL.
    Happy Listening!
    NS
     
    noSmoking

    noSmoking

    Member
    2010-05-07 6:46 pm
    Texas
  • #567
    mtoc said:
    Folks, an insider told a conclusion about these stuff. here we go:
    all of them have good mids
    xmos: highs bad, lows good
    6631: highs good, lows bad
    amanero: highs bad, lows good
    Click to expand...

    Hey mtoc,
    Do you think that maybe that's why dacs have filters built in them,Maybe a different algorithm could be written to adjust the tone or EQ and the volume inside the dac,I have contact buttons on some boards for vol,be nice to be able to eq inside the dac and control volume too.
    :)
    NS
     
    S

    spirakos

    Member
    2010-04-15 5:36 pm
  • #570
    Hi everyone,

    I have ordered a CM3166A board with IIS and SPDIF Outputs. Nothing more
    So i was looking for a dac to combine e.g.(ES9023, WM8740,CS4398,AK4495)
    but i have a question!
    Can i connect them directly or it need some receiver/decoder like CS8416 between them?

    Thanks in advance
     
    Last edited:
    F

    Foxx510

    Member
    2006-11-30 12:27 am
  • #571
    spirakos said:
    Hi everyone,

    I have orded a CM3166A board with IIS and SPDIF Outputs. Nothing more
    So i was looking for a dac to combine e.g.(ES9023, WM8740,CS4398,AK4495)
    but i have a question!
    Can i connect them directly or it need some receiver/decoder like CS8416 between them?

    Thanks in advance
    Click to expand...

    Do you mean you are building your own DAC from scratch using one of those chips, or ordering a pre built DAC unit or PCB?
     
    S

    spirakos

    Member
    2010-04-15 5:36 pm
  • #572
    Foxx510 said:
    Do you mean you are building your own DAC from scratch using one of those chips, or ordering a pre built DAC unit or PCB?
    Click to expand...

    Yes and no. It will be like from semi-scratch. Several mini boards to be combined with my own supply
    I want to avoid smd soldering, but if it's needed i can solder up to SOIC size and print 1-side pcb
    Stand-alone pcbs (with only 1 chip each) would be prefferable to combine them.
    Below is the board i ordered
    [IMGHTTPDEAD]http://www.thanksbuyer.com/image/cache/data/sku-51683-2-800x800.jpg[/IMGHTTPDEAD]

    So, what do you believe about #570
     
    Last edited:
    C

    carlmart

    Member
    2001-03-09 12:21 am
    Brazil
    preciseaudio.com
  • #576
    spirakos said:
    Can you please help me to understand what line-up matching means?
    Or some proposals maybe

    Thanks
    Click to expand...

    On one side of your board you have six pin holes: that is your I2S interface.

    I looked around to see if there were any DAC boards with the same pin order, but I couldn't find any.

    But you could use this one:

    NEW ES9018K2M ES9018 I2S input DAC decoder board

    As you can see, the pin order is not similar and can't be aligned directly with socketing. You will have to use either short (less than 10cm) flat cable interface or three short thin coaxials (shield always grounded) to link pin by pin. The pins are BCK, DATA, LRCK and DATA.
     

    Attachments

    • I2S interface.jpg
      I2S interface.jpg
      241.6 KB · Views: 1,313
    S

    spirakos

    Member
    2010-04-15 5:36 pm
  • #577
    carlmart said:
    On one side of your board you have six pin holes: that is your I2S interface.

    I looked around to see if there were any DAC boards with the same pin order, but I couldn't find any.

    But you could use this one:

    NEW ES9018K2M ES9018 I2S input DAC decoder board

    As you can see, the pin order is not similar and can't be aligned directly with socketing. You will have to use either short (less than 10cm) flat cable interface or three short thin coaxials (shield always grounded) to link pin by pin. The pins are BCK, DATA, LRCK and DATA.
    Click to expand...

    Now i see what you mean..!That is not a problem. Thanks
    I can use o short cable or make a mini pcb that will make the pairing

    So back to my first post

    Can i connect them directly or a receiver/decoder like CS8416 between them is needed?

    Reading about dac all these days it seems IIS pairing to be better. Am i wrong?
     
    Last edited:
    You must log in or register to reply here.
    Top Bottom