Hi Tomasz,

Any devellopments to report?

I recently checked the polarity of the Line and Nutral and that's all ok. That was one thing I promised myself to check.

In the upcomming time, if the weather keeps deteriorating, I will take out the 4 channel S/Pdiff module and maybe the Sidecar too. I only use the I2S with the teleporter so...

But I am wondering if Brian's suggetion works for you.
I do not use an Arduino so this might split our cases.

best regards,

Jordo

i have just got my parts this weekend and put them together. It looks fine, but still no joy on full dual mono.

Edited by user Sunday, September 20, 2015 9:17:39 AM(UTC)  | Reason: Not specified

Wow pretty jealous right now :) i am still working on mine on and off.

My problem at the moment is that whenever i play music it will unlock almost every time. The ufl connectors are around the 6 or 7cm (All the same length), then i tried the isolated side of the waveio usb with even shorter cables and i am getting the exact same problem.

Sometimes the only 1 dac will lock and play.

Hi Jordo

I didnt touch the clock but i did encounter a clue last night.

I am using a sidecar with a switch to go between i2s and the spdif 4 board. I had already disconnected the spdif as i was unable to get it to lock (i am ok with this as i dont use spdif anyway, just would have been nice). Anyway while running music the lock was very unstable, i was suspect about the switch so i disconnected the gnd to pin 14 cable and the lock stabilized. Reconnecting the cable and the stability disappeared.

Plays fine now.

i believe it was turned on, whatever the manual recommended me to do.

So, yesterday it began to rain.

I created a pair of shielded data cables for the Sidecar/DAC interface.
I used real nice Sommer Cable STP with foil shield. The shields I grounded to the shassis.
I have the impression I have a real clean and detailed sound but thats between my ears I think.

Nevertheless it has nothing to improve concerning the instant loss of lock when flipping a light switch or plugging in a wall wart into the socket.

The only thing I can do now is 100% shield the data transfer lines from the WaveIO circuit.
The DAC is now fully protected and shielded.

Jordo

Thanks guys, its still work in progress.

I just cannot get it done due to permanent lack of time.

Still trying to get software done (to pack all the grafic and code in half MB was not so easy ;) ) and give some last touch to the front...want to keep it simple...will probably end all in silver-black









anyway..... I have changed the ribbon cable, nothing changed. I just saw we both have two power supplies for the legato, mabe that make it unstable...i dont know. Like i said, have no time to get it completely running...would be happy to finish it....one day

So one note on using SPDIF autodetect.

I noticed earlier you said you were having some issue when having both SPDIF ans I2S sources.

Make sure when you have I2S sources selected that you disable SPDIF autodetect - this will avoid accidental unlock because sometimes the SPDIF detector can get a false positive on an I2S signal.

Hi,

I have done some more test this evening and thats what i have found out.


First of all it seems that its not the dual power supply that affect Legato (actually it works probably better than single one), what it is i dont know.

Now, I try to describe the test i have done:

First i thought if there is a problem with Legato, I am going to try to connect buffalo in voltage mode directly to power amp. I have disconnected the Buffalo form Legato and put the output of the DAC directly to power amp. Only one channel first, the left one.

The left channel worked just great, all 8 DACs in MONO, no distortion, no loosing lock by switching on and off the home equipement... just perfect!

I decided to put both channels on go and connected the right Buffalo to my power amp. Before i tested the output with earphones if there is any sound...and it looked good.
So i connected all the cables and turned DAC and then power amp on....holly shit, there where just loud clips from the speaker, i thought i burned the speaker! Have checked buffalo again with earphones...all fine. I have conneced the left buffalo to affected amp and it works fine (god bless you, even if im an atheist).

Well, knowing my right channel doesnt work in voltage mode and left does i decided to connect just the left channel to Legato and see what happens....shit happens actually...just distortion and some music in the background.

Again...it works all fine until i use just 4 DACS (or the left buffalo in voltage mode with all 8 DACs)

So comming to conclusion...somthing is wrong here!
I dont know where to dig, software must be fine.
in all dual mono with 8 DACs:
-left buffalo works perfect in voltage mode, with Legato its disaster.
-right buffalo works neither in voltage mode, nor with Legato.

What could that be??? need help, seriously

Edited by user Wednesday, October 28, 2015 11:14:31 PM(UTC)  | Reason: Not specified

Hi Russ,


Thanks for the answear.

I dont have a scope :/ I can just make some listening tests.
This is all a bit strange for me. If I put the earphones to balanced output of Buffalo (all 8 DAC added, full mono), it works just fine, both of Buffalos sound very good.

I can also config both of Buffalos as dual mono, and stack them on the Legato just with 4 DACs added (no mather which 4 DACS from 8) and it still works just fine.


So basically, it all works just fine... until i stuck full mono 8 DACS Buffalos on Legato. Basically the little disaster starts, strange thigs are happening... full distored sound, when i switch home equipement sound is gone (but lock is still there!?).




Russ, suppose i get myself the scope, how shall I proceed? Anything i can think of is to put the wave on the input and check the output.