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Old 30th November 2017, 03:42 PM   #321
Russ White is offline Russ White  United States
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Quote:
Originally Posted by janho12345 View Post
One more thing, excuse me if i'm wrong: Aren't the Data and word of the i2s interface always a LVDS?
That is incorrect.
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Old 30th November 2017, 04:51 PM   #322
BrianDonegan is offline BrianDonegan  United States
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Introducing the bit "Teleporter"
Quote:
Aren't the Data and word of the i2s interface always a LVDS?
No.
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Old 30th November 2017, 05:25 PM   #323
janho12345 is offline janho12345  Germany
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Thank you both!just ordered one =)


One (I hope) last thing:
From the data sheet of the IC used in Teleporter, it states that it can drive multiple targets with one channel.


If I'm driving 2 DACs with one Teleporter, MCLK is the (already ordered) Cronus, should I use 2 different channels, from two of the buffered MCLK outputs of the Cronus? Or just one one and then parallel or serial connect it?

What about termination?




(And if wiring up the propriety of th i2s signals from cronus to this 2 dacs - in parallel - right?)






Thank you very much, again!!!
You could promote this versatility of the Teleporter more. Before I thought it was ONLY for this long distance connection.
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Old 30th November 2017, 06:17 PM   #324
Russ White is offline Russ White  United States
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The only use case I have ever tried is sending to another teleporter - so you will need to try it on your own
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Old 11th December 2017, 04:20 PM   #325
ichiban is offline ichiban  United States
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Introducing the bit "Teleporter"
Default Does it make a sonic difference?

What's the consensus on using Teleporters to remote the BBB-Hermes-Cronus away from the converter dac box?

Is there a benefit sound wise, by moving the noisy BBB etc away from the dac?
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Old 11th December 2017, 06:45 PM   #326
francolargo is offline francolargo  United States
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Originally Posted by ichiban View Post
What's the consensus on using Teleporters to remote the BBB-Hermes-Cronus away from the converter dac box?
I doubt there is a consensus. Are you hearing noise?

I use teleporters between boxes for spacing issues to keep I2S lines very short. There is never any detectable noise, interference, or signal degradation even when the BBB is running filters at 95% CPU. That doesn't mean there would be noise if the boards were in closer proximity, though I believe USB wifi dongles have been reported as a significant noise source. Using teleporters with I2S, the signal at the DAC is robust so the dpll bandwidth can be set to 'no bandwidth', which gives audibly better performance with 9018s.

I have not tried transferring the master clock via teleporters for synchronous DAC operation. I'd appreciate hearing how well MCLK transfer works. If Teleporters give good synchronous DAC operation up to reasonably high PCM frequencies, then I see no downside whatsoever.
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Old 11th December 2017, 06:57 PM   #327
ichiban is offline ichiban  United States
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Introducing the bit "Teleporter"
Quote:
Originally Posted by francolargo View Post
I doubt there is a consensus. Are you hearing noise?

I use teleporters between boxes for spacing issues to keep I2S lines very short.
I'm not using Tele's, so no noise.
What I'd like to know, is if moving the BBB etc out of the DAC box
has resulted in an improvement in sound as the result of the move.

My thought was that clocks from the BBB & Cronus might be
affecting the sound, either by creating cross beating with the DACs
clock or spewing clock noise into the analog sections , IV converter,
outputs to RCA connectors?
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Old 11th December 2017, 09:25 PM   #328
Russ White is offline Russ White  United States
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The best solution is usually the simplest one
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Old 11th December 2017, 09:39 PM   #329
ichiban is offline ichiban  United States
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Introducing the bit "Teleporter"
Quote:
Originally Posted by Russ White View Post
The best solution is usually the simplest one
True.

Maybe, I'll setup a metal barrier between the DAC IV and the rest.
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Old 4th June 2018, 07:01 PM   #330
Unkgd is offline Unkgd  United States
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Introducing the bit "Teleporter"
Default Adverse effects from increasing number of connections between Transporter modules?

Currently have a RaspTouch unit that incorporates both the Raspberry Pi 2B+ and a touchscreen. Want to use the Transporter modules to communicate I2S to my DAC.

Would install the transmitting module close to the RPI and then wire it to a Neutrik Ethercon panel mount on the back panel of the RaspTouch case. Wires from the Teleporter to the Neutrik Ethercon will be twisted. Will duplicate this scheme inside the DAC.

Doing this will essentially double the amount of phsical connections versus cabling directly from Teleporter (Tx) to Teleporter (Rx).

Will configuring the Teleporters thi way have any negative effects on the I2S signal to the DAC?

TIA
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