Hi, I swapped out the 3v reg for a 5v New Class D and IMO sound quality improved, in particular the occasional crackle that appeared like analogue distortion went. I then moved from 4 decks to one deck and a buzz has started. I swapped the New Class D for the 5v standard reg that came with my new mainboard and the buzzing is still there but reduced........
I havn't spent much time/effort looking into this as I am doing a new build tomorrow with the super regs, caps new psus etc, so am hoping it will not be present on the new build but like your problem it's a bit weird and nothing obvious!
I havn't spent much time/effort looking into this as I am doing a new build tomorrow with the super regs, caps new psus etc, so am hoping it will not be present on the new build but like your problem it's a bit weird and nothing obvious!
I do, and they haven't done anything for ages as I haven't been using the WaveIO for some time now.
I understood those LEDs and the header connector next to them weren't joined in any way to the rest of the circuit?
I've just tested further with a cheap adjustable regulator, to see if I had a faulty 5v reg (I don't) and then to find out at what voltage this starts happening.
I get no additional distortion with the mainboard power up to about 4v, but at around 4.2v and above, I get this horrid distortion.
But, if I connect even a single lead from my voltmeter, either just the pos or gnd to the regulator's outputs or to the I2S pins on the board, then this distortion disappears completely 😕
I get no additional distortion with the mainboard power up to about 4v, but at around 4.2v and above, I get this horrid distortion.
But, if I connect even a single lead from my voltmeter, either just the pos or gnd to the regulator's outputs or to the I2S pins on the board, then this distortion disappears completely 😕
We'll i managed to do the half clock cycle mod with parts sent by Carlsor (many thanks). It was well worth it, the result is a clearer more detailed presentation which adds more definition and texture to vocals especially. We'll worth the effort. I also replaced the 3.3v regulator on the main board with a 5v one, and am not hearing any distortion as DWJames has, so can't really help here. Hopefully he can get it sorted.
Excellent 🙂 any pictures?
What source are you using?
I wonder if my issue relates to using an un-isolated Pi as my i2s source, but I still can't get my head around how waving my hands nearby can be the difference between beautiful music and horrible noises.... I guess for now I'll just back it off to 3.3v until divine inspiration arrives 🙂
I do have a picture of the mod boards on my phone but can't work out how to post it at the moment. The source is an Audio Note zero transport via the spdif board that doede sells. I may eventually upgrade to the new main board eventually to bring the spdif inboard. I've also reduced my four board stack to two at the moment, and may keep it that way so I can look at other mods that need more space than is available in a 4 stack and a low case.
If you use the Tapatalk phone app, it's literally a couple of clicks to post your images up. It resizes, uploads and hosts pictures for you straight off your phone. Dead easy 🙂
Not a great picture but it was only for wiring reference on my phone. Tapatalk makes photo uploads easy. I managed it!
Thanks. I was trying to keep the data wires as short as possible. Still very pleased with the improvement.
U take the data direct off the 164 logic chips?
Glad I didnt post my first attempt pics theses half clk cycle mods are done very tidy
Glad I didnt post my first attempt pics theses half clk cycle mods are done very tidy
For those interesting in BBB with DDDAC, happy to report this combo works even better than the Pi. I use Miero Botic driver, and it works out from the box with minimal effort. For remote client navigation, MPDroid for Android and MPoD for IOS are free. RuneAudio is soon coming out with BBB beta version, thus will simplify the setup altogether!
An externally hosted image should be here but it was not working when we last tested it.
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Nige2000 - I used the vias in the data lines, as I thought soldering directly to the ICs was too fiddly.
i was afraid to solder to them incase id lift em with my clumsy fingers wouldn't think it would take much
2 sk208r + circa 200 ohm r
prob my fav 2sk
better hf and more responsive/dynamic
prob my fav 2sk
better hf and more responsive/dynamic
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I completed my build with the new spdif/ usb board Belleson regs, separate digital and analogue power supplies, Oscons,and Silmics. The sound is very promising but one channel is quieter than the other. the clue I can find is the dc voltage on one output is 2.76v, whereas it's 1.38v on the other. I can't see any wrong conenctions. Any clues anyone?