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Old 17th April 2013, 01:39 PM   #381
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Join Date: Nov 2004
Location: Udine
Hello Ian,
if you are interested, I've a AD1865n-J dac and a SDTrans 192 reader that a I normally use with Sabre Dacs.
SDTrans I2S limit is 384Khz 32bit so I can test easily every format you like.

My AD1865 dac have EIAJ input that at the moment is directely connected to a Nec Multispin CD reader.
If I can help, I'm here. The dac is very easy and I can also rebuild a proto board for tests.
Ciao
Guglielmo
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Old 17th April 2013, 02:31 PM   #382
regal is offline regal  United States
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Location: MD
Quote:
Originally Posted by vzs View Post
Are PMD100 outputs reclocked before connecting to PCM1704?
- If no: go to the below suggestion
- If yes: probably doable with some modification - removing components/cutting traces - that you might not want to do...

Is PMD100 on socket?
- If yes: take it out gently and you are ready to plug-in NOS PCM board outputs via a pin-header(or similar)
- If no: consider adding one
Obviously its feasible technically but makes little sense, I could remove the entire digital section and possible fit the fifo inside, but best to just start fresh from scratch, just need to make some boards to hold the PCM1704's and caps and hook up a SE I/V, much more sensible than re-casing a 25 lbs $2k classic commercial DAC. Anyone have a Eagle libary with the PCM1704 ?
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Old 17th April 2013, 07:27 PM   #383
LuisMCP is offline LuisMCP  Spain
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Default Play 24/192 with PCM1704

Ian,

Testing 24/192 with PCM1704 NOS was succesful.

Aparently, I can reproduce 24/384 because a 192 kHz Track was reproduced with SoX and upsampling 2X was enabled.

Regards.
Luis.

Last edited by LuisMCP; 17th April 2013 at 07:34 PM.
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Old 18th April 2013, 06:19 AM   #384
kazap is offline kazap  Australia
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Ian - please let me know if I can be of any help in your project here.

I got a little DAC just to test this concept for myself. It is an Audio-gd DAC19MK3. I chose it as it has a removable digital board (right middle below). This board currently has a DF1704 to spit out Right justified data to one PCM1704 per channel. The board simply lifts out leaving a standard socket for a CAT6 copper data cable to plug in.
Attached Images
File Type: jpg AG-D DAC19.jpg (146.6 KB, 477 views)

Last edited by kazap; 18th April 2013 at 06:23 AM.
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Old 19th April 2013, 10:09 AM   #385
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Ian arrived the cables & u.fl sockets, thank you.
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Old 20th April 2013, 02:52 AM   #386
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Quote:
Originally Posted by LuisMCP View Post
Ian,

Testing 24/192 with PCM1704 NOS was succesful.

Aparently, I can reproduce 24/384 because a 192 kHz Track was reproduced with SoX and upsampling 2X was enabled.

Regards.
Luis.
Thank Luis for your good news. I need conform this it on my daughter board.

Nice weekend.

Ian
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Old 20th April 2013, 02:54 AM   #387
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Quote:
Originally Posted by kazap View Post
Ian - please let me know if I can be of any help in your project here.

I got a little DAC just to test this concept for myself. It is an Audio-gd DAC19MK3. I chose it as it has a removable digital board (right middle below). This board currently has a DF1704 to spit out Right justified data to one PCM1704 per channel. The board simply lifts out leaving a standard socket for a CAT6 copper data cable to plug in.
Hi kazap

Thank you so much for offering help. I'll let you know if I need some helps from you.

Have a nice weekend.

Ian
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Old 20th April 2013, 09:50 AM   #388
LuisMCP is offline LuisMCP  Spain
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Quote:
Originally Posted by iancanada View Post
Thank Luis for your good news. I need conform this it on my daughter board.

Nice weekend.

Ian
Ok Ian,

I could perform a test for you with my NOS PCM1704 if you wish.

Regards,

Luis.
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Old 21st April 2013, 03:05 AM   #389
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Default Confirmed TDA1541A works fine with the PCM daughter board from 44.1 to 192 KHz

I just came across getting a TDA1541A DAC board, so I can confirm the daughter board TDA1541A logic by myself.

TDA1541A configurations:
Pin27 connected to -5V (VDD1): simultaneous mode
Pin1 LE to LLLR
Pin2 BCK to CLK
Pin3 DATAL to DL
Pin4 DATAR to DR

I2S to PCM daughter board configurations:
JOB(IO7) short (offset binary format),
all other jumpers keep open (16bit mode)

Testing went through all the conditions:
Fs: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz,
MCLK: 22.579, 24.576, 45.158, 49.152 MHz,
Without and with FIFO.

It works perfect on all conditions. 192 KHz sounds much better than 44.1 KHz, impressive. This 1541 board used to work with SAA7220P digital filter, so I think it doesn’t have good NOS LPF. That might be one of the reasons. Just hope good software based up-sampling plug-in can boost 44.1K play back perfromance. That’s one of the goals of the I2S to PCM daughter board.

Some comment:
1, Continuous clock mode doesn’t work for TDA1541, has to be at stopped clock mode, no sound otherwise.
2, JTAIL and JLEAD are also no work for TDA1541, Have to keep all of them open.
3, To get better signal quality, u.fl coaxial cables are highly recommended for the connections between DAC and the daughter board

This DAC was just for confirming the PCM daughter board logic working for TDA1541. Just hope somebody else can do more research on it with higher standard 1541 DAC and better clock.

Ian
Attached Images
File Type: jpg FIFOKIT.JPG (373.9 KB, 422 views)
File Type: jpg DaughterBoardConnections.JPG (380.0 KB, 403 views)
File Type: jpg WithTDA1541A.JPG (334.0 KB, 394 views)
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http://www.diyaudio.com/forums/group...ml#post3662743

Last edited by iancanada; 21st April 2013 at 03:18 AM.
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Old 28th April 2013, 04:03 AM   #390
Ceglar is offline Ceglar  Australia
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TOTAL 90

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erin x1 (or 2)
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andrea_mori x 5
dsavitsk
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hirez69 x 2
ccliu x 2
BDL
cddumat
regal x 2
zoran
Jogi
Zen(zenelectro) x 2
Buzzforb
SPWON
crobbins5421 X 2
marcus1 x1 (or 2)
casshan x 2
Dweeb99 X 2
jackw X 2
kazap X 2
danzup x 3
Giordano x2
Tony_T
Tubo x1
clivem x2
noizas x4
JoeyDD x2
skullaudio
dinos8746 x2
dvb-projekt
bisesik x2
guglielmope x1
Valeriano x1
mhgawel x1
av-trouvaille x 1 (or 2)
iloveswan x1
dtses
Flyboi X1
Lil' Knight x1 (or 2)
skippyboy x1
acccruz x1 (or 2)
WhiteBull x1
hksidney x 1
vts2006 x 3
JustBuildLspkAS.x3 &1 fifo kit finished for pcm1704 (ihave AD1862 ,pcm63,pcm1704)
54: PET-240 2 * TDA1541
TonyB
damohpi x1
iloveswan x 1
Joseph K x 2
mefistofelez x2 (pcm63P)
JLOP x1 (WaveIO, AD1865 NOS SRPP)
sceglar x1
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