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Old 20th September 2012, 05:38 PM   #351
glt is offline glt  United States
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Quote:
Originally Posted by orpheus View Post
Thank you for taking the time to respond. I appreciate your help.

Right now I am using the Buffalo with a MUX, SPDIF to i2s. I don't experience any noise or dropouts with this configuration. I also have a Philips 963 SACD player hacked to output DSD, and this works without noise or issues into the i2s inputs on my DAC as well. I assume that I have the firmware that has the DPLL at the "lowest" setting, it has been a few years since I installed my Volumite (I think before the clock on the Buffalo II went to 100Mhz).

Should the ground be connected from the Amanero to the Buffalo? It plays music either way, but is one a better choice?

I did try my laptop last night, but it made too much noise and I had to stop (likely because it seems the default setting on the Amanero is maximum). I will try to get it working better this afternoon and report back. I'll look for the lock light and see if it goes on and off.

Aaron.
Do you mean this mux: S/PDIF 4:1 Receiver/MUX Module if that is the case and you don't have dropouts, the you likely have the DPLL set at "best" (not "lowest").

The GND of the Amanero board should be connected to the BII Gnd. Make sure the wire connections are solid.

I also have a BII-80, I have not tried mine but will do so soon...
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Old 20th September 2012, 06:03 PM   #352
opc is offline opc  Canada
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If it kinda works without any GND connection, then I'm guessing something is amiss with the wiring. Are you 100% confident that your ground connections are correct?

Try directly connecting the USB shell to the DGND on the DAC.

I too have a BII 80 and I have connected variety of different I2S sources to it without issue.

I'll be testing the Amanero with it this evening, so I can confirm later tonight or tomorrow.

Regards,
Owen
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Old 20th September 2012, 06:59 PM   #353
qusp is offline qusp  Australia
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well theres probably a ground loop, if it works without being grounded, chances are the dac is grounded somewhere else that is also connected to the same ground as the USB input to amanero. this could perhaps disrupt the dac enough to cause dropouts methinks. I have the 80MHz version as well as the 100MHz version BII and the Ackodac :redface: sounds like you too have 'best' DPLL Owen, with lowest you would definitely have encountered issues at some point. best is a dynamic setting that sets as low as it can while remaining with solid lock. in practice this is normally around medium-low->medium

actually thats a question for Amanero, will the combo384 work with just the data wires if external power supply is arranged? not all USB devices will allow this.

@glt: afaik 'lowest' spdif is a different DPLL setting to 'lowest' i2s, with the spdif being set to a less demanding setting. I could be wrong there, but thats my memory

Last edited by qusp; 20th September 2012 at 07:02 PM.
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Old 20th September 2012, 07:26 PM   #354
NicMac is offline NicMac  Italy
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Default Automatic DSD/I2S switching with Buffalo III SE?

I saw that TPA is about to release a Buffalo III SE (stereo edition) where one of the new features is that there is a header for changing the ES9018 settings between I2S and DSD. I think the Amanero USB/DSD/I2S has an output header which changes value when incoming DSD is detected.

Can this combo be wired so that Buffalo III SE changes settings automatically according to the Amanero output format?

Also, as the Amanero has an MCK output, and the BIII SE a MCK header one might play with synchronous clocking. Correct?

Any opinions?

Cheers,

Nic
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Old 20th September 2012, 07:52 PM   #355
qusp is offline qusp  Australia
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yes and yes =D

the DSDOE (Output Enable) pin can be harnessed to trigger switching, Amanero will have to define what happens when its sensed and the timing, it was touched on a few pages ago from memory. I presume its either an i2c output, or it pulls logic high, or logic low when DSD is detected.

you can use sync mode, but the onboard clock speeds are not high enough for the ESS oversampling filter to also be enabled at the higher bandwidths. it also, although providing an MCLK output, isnt really an ideal connector type and probably not the lowest jitter. i'm sure it'll work though. it'll work for up to 88.2/96khz with the oversampling on, or the full range of speeds with it off.

so without the oversampling filter for higher speeds, as well as not ideal connections for a remote MCLK, i'm pretty certain jitter will be higher than using the async onboard clock, so will be somewhat counter-productive IMO.

Last edited by qusp; 20th September 2012 at 07:55 PM.
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Old 20th September 2012, 08:03 PM   #356
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I played DSD trought Amanero USB-I2S with the same connection like PCM between the USB-I2S and the B3.

All my USB-I2S (Amanero & Lorien) card needs to connect is gnd ground to Sidecar gnd to play. Also my USB-SPDIF HiFace card need to connect is gnd ground to play.

Last edited by merlin el mago; 20th September 2012 at 08:06 PM.
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Old 20th September 2012, 08:21 PM   #357
qusp is offline qusp  Australia
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what about the IIR bandwidth? there is different settings in the IIR for PCM and DSD, this will not be switched with your method

Last edited by qusp; 20th September 2012 at 08:30 PM.
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Old 20th September 2012, 09:07 PM   #358
tassosk is offline tassosk  Greece
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My board arrived today. Nice little toy...
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Old 20th September 2012, 11:16 PM   #359
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by orpheus View Post
I assume that I have the firmware that has the DPLL at the "lowest" setting, it has been a few years since I installed my Volumite (I think before the clock on the Buffalo II went to 100Mhz).
If you have any concern on the DPLL bandwidth setting of your firmware, why don't you detach MCU and make a DAC chip default effective. In that case, please remember that a volume gets small because of no input redirections.
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Old 21st September 2012, 08:09 AM   #360
August is offline August  Netherlands
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Quote:
Originally Posted by qusp View Post
umm, no...

even if you could I really dont know why you would get this board if you were going to do that. for starters there is no way to send the DSD over spdif and the max PCM you could send is 192khz. With the added jitter and cost for adding a further i2s->Spdif stage to this, you may as well just get another USB->SPDIF module.

I presume you thought you could send DSD somehow?
The SDIF-2 interface is a three wire professional studio interface that in dCS (and Sony, pyramix, etc.) professional units can be used to transmits DSD in the configuration L, R, CLK, just like this raw I2S. But in contrast to I2S which is really only a protocol that is normally used for internal communication on short lengths between chips, SDIF-2 is suitable for normal length cables (75 Ohm BNC)

So I have DSD capable DAC that can recieve it in SDIF-2 format. I currently upsample to DSD and then go to the DAC, but if there is any way to convert I2S to SDIF-2, I could benefit from native DSD files played on my computer. But I figured it wasn't going to be easy despite the similarity of the three wire interface.
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