Hi Peter,
completed the usb dac and all is working fine, cant wait to get back to uni to try it out with my active x-over biamp gc set up,
A while back you mentioned that you had yet to optimise your computer for the dac,
Did you get anywhere with this, I can't see a great deal of options available really.
Regards
Dan
completed the usb dac and all is working fine, cant wait to get back to uni to try it out with my active x-over biamp gc set up,
A while back you mentioned that you had yet to optimise your computer for the dac,
Did you get anywhere with this, I can't see a great deal of options available really.
Regards
Dan
DDDAC
Hello All,
I'm reading this forum about the gainclone with intrest.
I also read that people are building DAC's here, well I also build one using the "same" components. My DAC uses 8 TDA 1543 [paralel] and the CS 8412. Also I use a clock to reclock the signal the clock is from TentLabs [www.tentlabs.nl]. The design of the DAC is from Doude Douma [http://www.dddac.de].
The DAC works on a battery so no dirt from the net
It's really a good DAC, great sonics en luts of detail.
I have enclosed a picture of the PCB
Kind regards,
Arjen de Boer
NoNo Cables
Hello All,
I'm reading this forum about the gainclone with intrest.
I also read that people are building DAC's here, well I also build one using the "same" components. My DAC uses 8 TDA 1543 [paralel] and the CS 8412. Also I use a clock to reclock the signal the clock is from TentLabs [www.tentlabs.nl]. The design of the DAC is from Doude Douma [http://www.dddac.de].
The DAC works on a battery so no dirt from the net
It's really a good DAC, great sonics en luts of detail.
I have enclosed a picture of the PCB
Kind regards,
Arjen de Boer
NoNo Cables
I just built another kit by you Peter but am having trouble making it work with my SqueezeBox or something. I thought the problem was with the SqueezeBox but I am not sure now.
On my SqueezeBox I removed C16 and C20, then used some of inside wire of a mic cable to go from that to 4.7uf BlackGate N capacitors, then to some Dayton RCA's. There is the ground running from the Daytons to where the original ground was for the RCAs. It has noise now, like digital or something, it sounds like the music just enough that I can tell it is it before the DAC, but is not amplified by the DAC. I do know if I pull the unit out and play it while the positive leads are no where near anything, there is zero noise. I think shielded wire would be best for this modification.
My Gainclone is almost dead silent with no RCA's plugged into anything. I tried to Chassis ground it by running earth ground to chassis and got a lot of hum, so it has no real chassis ground. I just have the two Chassis grounds and transformer grounds running into the common on the AC jack. I also have a .1uf X2 Panasonic cap across the positive and common to prevent noise... Part of it might be the lack of proper ground, it may only be the ground strap operating, my house sucks.
If there is any connection I am not sure. The Gainclone seems to work great.
On my SqueezeBox I removed C16 and C20, then used some of inside wire of a mic cable to go from that to 4.7uf BlackGate N capacitors, then to some Dayton RCA's. There is the ground running from the Daytons to where the original ground was for the RCAs. It has noise now, like digital or something, it sounds like the music just enough that I can tell it is it before the DAC, but is not amplified by the DAC. I do know if I pull the unit out and play it while the positive leads are no where near anything, there is zero noise. I think shielded wire would be best for this modification.
My Gainclone is almost dead silent with no RCA's plugged into anything. I tried to Chassis ground it by running earth ground to chassis and got a lot of hum, so it has no real chassis ground. I just have the two Chassis grounds and transformer grounds running into the common on the AC jack. I also have a .1uf X2 Panasonic cap across the positive and common to prevent noise... Part of it might be the lack of proper ground, it may only be the ground strap operating, my house sucks.
If there is any connection I am not sure. The Gainclone seems to work great.
Balanced NOS DAC
HI peter i just want to make sure i am doing the right thing here, the output on pin26 from CS8412 (SDATA) goes to pin 9&13 on 74ACT86 (DOUT) then pin 11 DATA- and pin8 DATA+ from the 74ACT86 goes to pin 3 DATA on each TDA1543 to create balanced L & R channel. Is this correct?
HI peter i just want to make sure i am doing the right thing here, the output on pin26 from CS8412 (SDATA) goes to pin 9&13 on 74ACT86 (DOUT) then pin 11 DATA- and pin8 DATA+ from the 74ACT86 goes to pin 3 DATA on each TDA1543 to create balanced L & R channel. Is this correct?
Attachments
USB board
Hi peter
on your USB board there is BCK, DOUT and LCRK(WS) out from PCM2706
on your SPDIF DAC you have BCK,DATA and WS(LCRK) from the CS8412 chip. can i take the DOUT from PCM2706 and connect it directly to the SPDIF input on the old DAC and not worry about BCK and LCRK, or should i get a 9pin 3 pole toggle switch and switch after the input buffers ? i hope you understand the question
Hi peter
on your USB board there is BCK, DOUT and LCRK(WS) out from PCM2706
on your SPDIF DAC you have BCK,DATA and WS(LCRK) from the CS8412 chip. can i take the DOUT from PCM2706 and connect it directly to the SPDIF input on the old DAC and not worry about BCK and LCRK, or should i get a 9pin 3 pole toggle switch and switch after the input buffers ? i hope you understand the question
As it is configured on my board now, BCK, DOUT and WS form I2S interface which is the same output signal format for both PCM2706 receiver chip and CS8412 SPDIF receiver chip. The DOUT signal is not compaticble with SPDIF format so you cannot feed it back into BNC or RCA connector on your old DAC; a 3 pole switch is needed (assuming the grounds are connected permanently).
However, PCM2706 can also output SPDIF signal, providing the FSEL pin is high (pin 9 connected to VDD, it is permanently grounded on my board). In that case you could connect DOUT from pin 17 directly to DAC input.
http://focus.ti.com/lit/ds/symlink/pcm2704.pdf
However, PCM2706 can also output SPDIF signal, providing the FSEL pin is high (pin 9 connected to VDD, it is permanently grounded on my board). In that case you could connect DOUT from pin 17 directly to DAC input.
http://focus.ti.com/lit/ds/symlink/pcm2704.pdf
Thank you peter
so i can bring pin 9 high by getting 3.3v from pin 10 and then i can hook DOUT (17) directly to my SPDIF on my dac. That sounds easy would that compromise the sound quality in any way, since the signal would have to go through both Sn75179 and CS8412. With the switch that would be bypassed.
so i can bring pin 9 high by getting 3.3v from pin 10 and then i can hook DOUT (17) directly to my SPDIF on my dac. That sounds easy would that compromise the sound quality in any way, since the signal would have to go through both Sn75179 and CS8412. With the switch that would be bypassed.
It's hard for me to say how much of a compromise that would be, as I never tried it.
Some comments about comparison can be forund here: http://www.diyaudio.com/forums/showthread.php?postid=1385591#post1385591
Some comments about comparison can be forund here: http://www.diyaudio.com/forums/showthread.php?postid=1385591#post1385591
gainclone and buffer
i'm finishing up my first gainclone to use with an imod and fostex full range horn speakers. the speakers are efficient at 94 dB but the imod output voltage is low at 1Vrms so i was wondering if a buffer is needed. my listening area is large but i will not be playing music at very high levels.
i was hoping that someone with some experience could point me in the right direction. cheers!
i'm finishing up my first gainclone to use with an imod and fostex full range horn speakers. the speakers are efficient at 94 dB but the imod output voltage is low at 1Vrms so i was wondering if a buffer is needed. my listening area is large but i will not be playing music at very high levels.
i was hoping that someone with some experience could point me in the right direction. cheers!
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