Sure.....I am in Israel this week on business and will do when back but it is based on what we all have done with a choke PSU I feel.
Its really strange and I need to sit with a scope and test signal to see where the problem is
[Originally Posted by mbrennwa
Ground loop/hum interfering with digital signals? Can you try with the 5V PSU?]
Now I connected the WaveIO board to the DDDAC 5V PSU (floating). The
WaveIO board was also floating (not using hexagonal standoffs). USB input is from a Notebook running off battery.
When music is played through Foobar, only hisses are heard. When I stopped music, complete silence resulted. Of course, music can still be played through spdif.
Any suggestions?
Ground loop/hum interfering with digital signals? Can you try with the 5V PSU?]
Now I connected the WaveIO board to the DDDAC 5V PSU (floating). The
WaveIO board was also floating (not using hexagonal standoffs). USB input is from a Notebook running off battery.
When music is played through Foobar, only hisses are heard. When I stopped music, complete silence resulted. Of course, music can still be played through spdif.
Any suggestions?
Try to find out if the problem is related to the WaveIO or the DDDAC. Do you have another USB --> SPDIF converter you could try? Or another device with an SPDIF input?
Also, which sampling rate is your audio data coming from the computer, and what sampling rate does the DDDAC display?
What kind of wire are you using between the WaveIO and DDDAC? I had a similar behaviour when I mixed up BCK and LR signals on that connection
Sent from my HTC 10 using Tapatalk
Sent from my HTC 10 using Tapatalk
[originally posted by mbrennwa
I do not have another USB to SPDIF converter. I have a Mytek Stereo 192 DSD DAC that accepts SPDIF/USB/Firewire inputs but produces only analog outputs. But may I ask why I needed to have another SPDIF input for checking?
For testing purposes, I am playing compressed music encoded by itunes 10.6.3.25. This information is obtained from the track information provided by Foobar 2000 v1.3.11. The music, I believe, is 16-bit, 44.1 kHZ.
On the DDDAC LED readout, when music plays, the POWER, HOST ACTIVE, AUDIO STREAMING, and 44.1 kHZ LEDs were lit.
When I stopped the music from Foobar, only the POWER and HOST ACTIVE LEDs were lit.
When I unplugged the USB from WaveIO board, the HOST ACTIVE LED was switched off.
I do not have another USB to SPDIF converter. I have a Mytek Stereo 192 DSD DAC that accepts SPDIF/USB/Firewire inputs but produces only analog outputs. But may I ask why I needed to have another SPDIF input for checking?
For testing purposes, I am playing compressed music encoded by itunes 10.6.3.25. This information is obtained from the track information provided by Foobar 2000 v1.3.11. The music, I believe, is 16-bit, 44.1 kHZ.
On the DDDAC LED readout, when music plays, the POWER, HOST ACTIVE, AUDIO STREAMING, and 44.1 kHZ LEDs were lit.
When I stopped the music from Foobar, only the POWER and HOST ACTIVE LEDs were lit.
When I unplugged the USB from WaveIO board, the HOST ACTIVE LED was switched off.
The temp you are running at is no problem, In my experiments with the DDDAC power supply, I had 70ºC with no problems.
I did end up making the power supply separate from the Dac which used a huge 300 x 160 heat sink down both sides so now it runs at 10ºC above ambient.
Originally posted by superberg
I used the DDDAC supplied flat cable header. I attach a photo for your advice please.
I used the DDDAC supplied flat cable header. I attach a photo for your advice please.
Just set up my old 2 DAC module dddac and no issues at all with females high frequencies
I will now methodically go through my 8 DAC module DAC to try to get to the bottom of my problem and getting a scope next week on loan
I will now methodically go through my 8 DAC module DAC to try to get to the bottom of my problem and getting a scope next week on loan
Last edited:
Kali
Hi Alabama,
The kali is now feeded by ddouma psu 5v, together with the pi2. I use the pins on the kali next to the 5v entrance on the kali. The jumper on the kali is off, so the kali and rpi2 have their private power input. The ddouma psu gives on the kali gives more refinement. So no need to have the 3A 5v adapter.
Hi Alabama,
The kali is now feeded by ddouma psu 5v, together with the pi2. I use the pins on the kali next to the 5v entrance on the kali. The jumper on the kali is off, so the kali and rpi2 have their private power input. The ddouma psu gives on the kali gives more refinement. So no need to have the 3A 5v adapter.
Hi Pz,
That is great news and has made me decide to buy the Kali and a new DDDAC 5V PSU. It will also be a very compact set up with the Kali and Rpi together.
That is great news and has made me decide to buy the Kali and a new DDDAC 5V PSU. It will also be a very compact set up with the Kali and Rpi together.
50 is absolutely ok technically. Unless you have other reasons to want it cooler ?
So I need to get my head around this. What is given is that I have the dddac with waveio, feeding it today with a USB signal from a BBB. I also have the RPI, also then using USB straight from the RPI with Volumio (the only player that actually made that configuration work).
If I want to use a BBB _or_ RPI, will it improve SQ to use a reclocker?
Which solutions have been proven to work well here? (Ian's, Acko, Hermes/Cronus, HifiBerry Digi, Allo)
OR is it better (in terms of SQ) to use another player like mRendu or SOTM sMS-200?
Is the waveio doing any reclocking btw? And if so, will it still be 'better' to use a reclocker before the waveio?
Sorry if this sounds stupid ... :-/
If I want to use a BBB _or_ RPI, will it improve SQ to use a reclocker?
Which solutions have been proven to work well here? (Ian's, Acko, Hermes/Cronus, HifiBerry Digi, Allo)
OR is it better (in terms of SQ) to use another player like mRendu or SOTM sMS-200?
Is the waveio doing any reclocking btw? And if so, will it still be 'better' to use a reclocker before the waveio?
Sorry if this sounds stupid ... :-/
Cooler often means more reliable 😉 choke PSU is back on now in my testing to see where the issue is
With Doede assistance the higher frequency distortion issue I had is now fixed 🙂
The Sowters deliver 4 times greater output and the higher harmonics were distorting at times due to this in my system. I use single ended RCA outputs and the fix was to use the center tap of the Sowter output to the "cold" or "ground" of the RCA connector which reduced the 4 times output to 2 times.
The Sowters deliver 4 times greater output and the higher harmonics were distorting at times due to this in my system. I use single ended RCA outputs and the fix was to use the center tap of the Sowter output to the "cold" or "ground" of the RCA connector which reduced the 4 times output to 2 times.
Hello friends
I'm new to this forum. I am building the dac.
I am trying to test the motherboard before soldering my 4 cards dac and I have a problem with the 3.3V power supply that feeds the SPDIF receiver WM8804.
The LF33 regulator quickly becomes very hot.
So I removed the regulator that I had luckily plugged into 1 support for later to change regulator.
I of course check the few welds (C5 C6 C7,C12,R4-R8).
Note that with the ohmmeter I have only a few ohms between the ground and the 3.3V power supply ???????But a bit more than a short circuit.
WM8804 defective circuit ?
Thanks for the answer.
Pierre
I'm new to this forum. I am building the dac.
I am trying to test the motherboard before soldering my 4 cards dac and I have a problem with the 3.3V power supply that feeds the SPDIF receiver WM8804.
The LF33 regulator quickly becomes very hot.
So I removed the regulator that I had luckily plugged into 1 support for later to change regulator.
I of course check the few welds (C5 C6 C7,C12,R4-R8).
Note that with the ohmmeter I have only a few ohms between the ground and the 3.3V power supply ???????But a bit more than a short circuit.
WM8804 defective circuit ?
Thanks for the answer.
Pierre
I am using bbb-hermes-cronus from the first batch of tp. This is the best you can use soundwise.
Thext to this I have used acko reclocker on rpi, good sound but not as good as the bbb setup..
Now I am experimenting with kali on rpi, this sounds very good and a tad below my bbb setup.
Hope this helps.
Could you send a photo of both sides of the board, then one of our Eagle eyed members may spot the problem.
Check for capacitors fitted wrong as a reversed capacitor would heat up the regulator.
I had this and it turned out to be a faulty ribbon connector shorting the power to the Wave IO board