no spdif-in

Discussion in 'General Discussion' started by geraldandreas, Jul 20, 2004.

  1. geraldandreas

    geraldandreas KX-Driver Lover

    Joined:
    Mar 31, 2003
    Messages:
    241
    Likes Received:
    0
    Trophy Points:
    0
    no spdif-in, except CD-spdif

    maybe anyone know this problem. i had tried to have 2 spdif-in on a ct4760, the cd-spdif is working well, also 2 spdif-out (i made some chinch-connectors on a free slotplate) and also aux1. but i can´t get a second spdif-in. i know the pinout from AUD_EXT, had tried all but i only get the cd-spdif to work. (in spdif/i2s statuswindow, it is spdif A. have i to switch some with kxctrl?

    here is a pic from this slotplate

    the headphone-connector is connected on the back of the soundcard, analog front and work also very well.
     
    Last edited: Jul 20, 2004
  2. dj_stick

    dj_stick Apple Fanboy?

    Joined:
    Jun 3, 2003
    Messages:
    17,575
    Likes Received:
    204
    Trophy Points:
    88
    it should be active automatically…
    make sure you have the polaritys correct - CD-SPDIF works fine when connected to the AUD_EXT header for me
     
  3. geraldandreas

    geraldandreas KX-Driver Lover

    Joined:
    Mar 31, 2003
    Messages:
    241
    Likes Received:
    0
    Trophy Points:
    0
    the polaritys was ok, but i mean not the cd.spdif in, i mean the 2 others. on my paper, pin 6 should be gp_SPDIFIN#2 and 5 + 7 is ground. and also pin 15 GP_SPDIFIN1, 14 and 16 are also ground. i had also tried 23 GPI0 and 24 GPI1, without any signal in.
     
  4. dj_stick

    dj_stick Apple Fanboy?

    Joined:
    Jun 3, 2003
    Messages:
    17,575
    Likes Received:
    204
    Trophy Points:
    88
    Code:
    AUD_EXT connector pin assignments
    
    Note
    
    ADC stands for Analog-to-Digital Converter
    
    Pin	Name	Description
    1	VCC	+5V power supply
    2	VCC	+5V power supply
    3	GND	Ground
    4	AC97CLK	24.5 MHz clock output
    5	GND	Ground
    6	GP_SPDIFIN#2	SPDIF input signal
    7	GND	Ground
    8	GND	Ground
    9	SPDIFO#3	SPDIF Out signal
    10	GPO1	General Purpose Output #1
    11	GPO2	General Purpose Output #2
    12	GND	Ground
    13	GPO0	General Purpose Output #0
    14	GND	Ground
    15	GP_SPDIFIN1	SPDIF Input signal
    16	GND	Ground
    17	SPDIFO#0	SPDIF Out signal
    
    18	GND	Ground
    19	SPDIFO#1	SPDIF Out signal
    20	GND	Ground
    21	GND	Ground
    22	SPDIFO#2	SPDIF Out signal
    23	GPI0	Digital Input (GP Input 0; Reserved)
    24	GPI1	Digital Input, (GP Input 1; Reserved)
    25	OUTMIDI	MIDI Output
    26	GND	Ground
    27	INMIDI	MIDI Input
    28	GND	Ground
    29	KEY
    30	KEY
    31	ADCSDO2	I2S audio data input.
    32	GND	Ground
    33	ADCSDO1	I2S audio data input.
    34	GND	Ground
    35	ADCSDO0	I2S audio data input.
    36	GND	Ground
    37	I2SCLK	I2S serial bit clock.
    
    38	GND	Ground
    39	I2SFS	Frame sync.
    40	GND	Ground
    15 and 6 should work according to that
     
  5. geraldandreas

    geraldandreas KX-Driver Lover

    Joined:
    Mar 31, 2003
    Messages:
    241
    Likes Received:
    0
    Trophy Points:
    0
    thanks dj stick

    i have exactly the same list, but i get no input.
    it is very courios, the outputs are working well, i have 17, 18, 19 +20 for out.
     
  6. dj_stick

    dj_stick Apple Fanboy?

    Joined:
    Jun 3, 2003
    Messages:
    17,575
    Likes Received:
    204
    Trophy Points:
    88
    check in the kX mixer to see if those inputs are unmuted and increase… also try a loopback -use CD_SPDIF cable directly from AUD_EXT out to AUD_EXT in
     
  7. Samir

    Samir kX Lover

    Joined:
    Jan 14, 2003
    Messages:
    520
    Likes Received:
    0
    Trophy Points:
    0
    geraldandreas:

    CD_SPDIF IN is coax input, not TTL as on AUD_EXT connector! That means you can't connect without proper conversion. See 'S/PDIF coax input circuit' on this page...
     
  8. dj_stick

    dj_stick Apple Fanboy?

    Joined:
    Jun 3, 2003
    Messages:
    17,575
    Likes Received:
    204
    Trophy Points:
    88
    Samir afaik the CD_SPDIF input is TTL… as most CD Drives use TTL
     
  9. dj_stick

    dj_stick Apple Fanboy?

    Joined:
    Jun 3, 2003
    Messages:
    17,575
    Likes Received:
    204
    Trophy Points:
    88
    simple circuits to convert TTL - Coax and Coax- TTL - scroll down the page

    also at the bottom of the page is an entry about someone sending s/pdif signals over a wireless 2.4ghz video sender… think of the possibilities
     
  10. geraldandreas

    geraldandreas KX-Driver Lover

    Joined:
    Mar 31, 2003
    Messages:
    241
    Likes Received:
    0
    Trophy Points:
    0
    hy guys

    thanks for the answers, when i understand it right, i have to use a converter . my idea was, to record from 2 spdif-out (2 pc, 2 livedrive) to a third pc. and i was wondering, why i get only R and S, but not V in spdif/i2s statuswindow. when i do this with the coax from LD-out to LD-in ii get all 3 (R, S, V)
     
  11. Samir

    Samir kX Lover

    Joined:
    Jan 14, 2003
    Messages:
    520
    Likes Received:
    0
    Trophy Points:
    0
    :duh: On my Audigy2 CD_SPDIF input seems to be coax not TTL! Phew!

    Seems your livedrives are sending AC3 streams over SPDIFs... Have you tried to record/decode these?
     
  12. geraldandreas

    geraldandreas KX-Driver Lover

    Joined:
    Mar 31, 2003
    Messages:
    241
    Likes Received:
    0
    Trophy Points:
    0
    no

    this is a good idea, i will try it out
     
  13. TravelRec.

    TravelRec. Alternative Audioproductions

    Joined:
    Sep 8, 2003
    Messages:
    1,710
    Likes Received:
    3
    Trophy Points:
    0
    Hi!

    CD_SPDIF in accepts everything between 0.5 V to 5 V (as logic High) compared to ground, since it has a built in converter. All AUD_EXT SPDIFs are TTLs (2.7-5V High 0-0.7V Low). You have to use optical receivers (connected via optical fibre cable with other optical transmitters) or coax-optical (TTL) transformers to get proper levels.

    Greetings!

    TravelRec. :)
     

Share This Page

visited