Hi,
Could you specify more about those plops.
What is your OS, when they appear (in what circumstances)?
Regards,
Joro
Could you specify more about those plops.
What is your OS, when they appear (in what circumstances)?
Regards,
Joro
I'm on Win8 x64, they happen on bitrate changes. Anyway I couldn't try with powering solutions (USB or PSU) other than the 5V "power bank". I installed the new driver, but I got lost on Spotify (
) and it was too late to test properly. I'll do tonite and report back.Joro.
Thx for the 5V hint. Wasn't that difficult.
I'll try that. I guess both jumpers need to be removed.
What functions will be missing if using that 5V access point instead of the 7,5V?
I was thinking that even with the 5V accesspoint there'll be a two-stage (5 and 3.3V)
regulation.
If people have to take care on clean 5V, it wouldn't be a big deal going straight to
3.3V and by that getting rid of the two-stage regulation!?!? Perhaps external 3.3V
can be injected after the 3.3V regulator. Though I'm not sure what happens with the reclocker on the lower board.
Cheers
PS: There are better caps the Pana FC for the DAC.
Thx for the 5V hint. Wasn't that difficult.
I'll try that. I guess both jumpers need to be removed.
What functions will be missing if using that 5V access point instead of the 7,5V?
I was thinking that even with the 5V accesspoint there'll be a two-stage (5 and 3.3V)
regulation.
If people have to take care on clean 5V, it wouldn't be a big deal going straight to
3.3V and by that getting rid of the two-stage regulation!?!? Perhaps external 3.3V
can be injected after the 3.3V regulator. Though I'm not sure what happens with the reclocker on the lower board.
Cheers
PS: There are better caps the Pana FC for the DAC.
Hi,
The reason is not in the driver, nor the PSU. In order to configure both PCM and DSD, we have to use external microcontroller and in this mode pin8 (mute on AK4396 DAC) is used as chipselect pin. In this case one have to use external mute (you can check page 31 of AK4396 datasheet , please note that in software mode the mute is external). This is pin 2 on the AK4396 board. One can use reed relay or other relay with switch time less than 2ms.
As discussed, the present issue concerns playlist of mixed fs, which is rare, and I didn't want to enlarge the board with an external mute
.
Regards,
Joro
The reason is not in the driver, nor the PSU. In order to configure both PCM and DSD, we have to use external microcontroller and in this mode pin8 (mute on AK4396 DAC) is used as chipselect pin. In this case one have to use external mute (you can check page 31 of AK4396 datasheet , please note that in software mode the mute is external). This is pin 2 on the AK4396 board. One can use reed relay or other relay with switch time less than 2ms.
As discussed, the present issue concerns playlist of mixed fs, which is rare, and I didn't want to enlarge the board with an external mute
.Regards,
Joro
Hi everyone! I have been using the USB to I2S board together with the AK4396 board and the simple power supplies for about two months now.
I am very happy with the result music is very natural sounding.
I have had no problems whatsoever and connectivity was trouble free with the older driver and also no problem with the new driver.
I use foobar and have all kinds of music files including DSD.
All play without any problem and i am enjoying my music.
Slight criticism is a little bit lack of dynamics compared to my other dacs, but i have Salas shunts and larger trafos on them than what i use here.
I will build two Salas shunts and will report back.
Thank you joro_s for a very nice project!!
I am very happy with the result music is very natural sounding.
I have had no problems whatsoever and connectivity was trouble free with the older driver and also no problem with the new driver.
I use foobar and have all kinds of music files including DSD.
All play without any problem and i am enjoying my music.
Slight criticism is a little bit lack of dynamics compared to my other dacs, but i have Salas shunts and larger trafos on them than what i use here.
I will build two Salas shunts and will report back.
Thank you joro_s for a very nice project!!
Hi,
Yes, you are right. Both jumpers have to be removed.
No missing functions, if using 5V PSU instead of 7.5V (according to the picture in post #238).
If we use 3.3V, the two LP5900 on the XMOS board (for reclock and oscillators) will go out of operation point.
Regards,
Joro
Yes, you are right. Both jumpers have to be removed.
No missing functions, if using 5V PSU instead of 7.5V (according to the picture in post #238).
If we use 3.3V, the two LP5900 on the XMOS board (for reclock and oscillators) will go out of operation point.
Regards,
Joro
OK. I see. It would require three external 3.3V sources instead of one 5V, if one wanted to get rid of that two-stage regulation.
THX
Hi,
The reason is not in the driver, nor the PSU. In order to configure both PCM and DSD, we have to use external microcontroller and in this mode pin8 (mute on AK4396 DAC) is used as chipselect pin. In this case one have to use external mute (you can check page 31 of AK4396 datasheet , please note that in software mode the mute is external). This is pin 2 on the AK4396 board. One can use reed relay or other relay with switch time less than 2ms.
As discussed, the present issue concerns playlist of mixed fs, which is rare, and I didn't want to enlarge the board with an external mute
Regards,
Joro
Don't worry Joro, it's just chit-chat. I'm really enjoying this combo.
Thanks again!
Marco
Having a preregulator feeding the regulator for a clock oscillator might be useful.
I've got an audible improvement when installed a Belleson as a preregulator to the D-Clock Neutrino.
NewClassD DClock Neutrino
Question for Joro:
If I would like to install a separate preregulator only for the reclock and oscillators what would be the necessary steps?
Hi Soundcheck! Do you still have your offer (50 % of), or did you change your mind so fast?
As a matter of fact I received some inquiries.
Bottom line. I decided to keep the board.
This way I'll have a device for benchmarking. The required powersupplies I have at hand anyhow. Beside that, as discussed just recently, I can use 5V instead of 7.5V. And that makes live much easier for me.
I also sent the M2Tech USB DAC back.
However. The M2Tech DAC should IMO be taken as a benchmark. Especially when considering its outstanding performance when buspowered. It's been
a very convenient and enjoyable device.
And. Even though I'm keeping the device, doesn't mean that the weaknesses I see with it are gone.
Cheers
Last edited:
Hi,
Chris1967 thank you for your feedback.
Could you please clarify: you want to feed the oscillators and reclock with other 3.3V regulator (or with two regulators), or you want to separate the DACs' power supply form power supply for the oscillators and reclock?
Regards,
Joro
Chris1967 thank you for your feedback.
Could you please clarify: you want to feed the oscillators and reclock with other 3.3V regulator (or with two regulators), or you want to separate the DACs' power supply form power supply for the oscillators and reclock?
Regards,
Joro
I would like to separate the DACs' power supply and introduce one preregulator for existing power supply related to the oscillators and reclock.
Attachments
Why don't you measure voltage drop across that 4R7 resistor and calculate current from there?
Regards
Marko
Hi,
The reclock and the oscillators consume around 60mA. The AK4396 DAC consumes around 60mA. It's good to have 10 to 20% reserve.
Yes, you are right. The USB part consumes around 335mA and the AK4396 DAC and the oscillators and the recolck on the XMOS board consume around 120mA.
Regards,
Joro
The reclock and the oscillators consume around 60mA. The AK4396 DAC consumes around 60mA. It's good to have 10 to 20% reserve.
Yes, you are right. The USB part consumes around 335mA and the AK4396 DAC and the oscillators and the recolck on the XMOS board consume around 120mA.
Regards,
Joro
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