Digital Source Advice

slavedata

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Bottesford Melton
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Dave Slater
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It was me. I confused TOS and SPDIF I agree I was wrong. I apologised up thread and suggested TOS alternatives. I know in the design of the Digione Allo specifically rejected TOS, I think but I'm not sure, because  of clocking issues with TOS.

 

bencat

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It was me. I confused TOS and SPDIF I agree I was wrong. I apologised up thread and suggested TOS alternatives. I know in the design of the Digione Allo specifically rejected TOS, I think but I'm not sure, because  of clocking issues with TOS.
Dave i did not mean you there is a comment that John Darko says , or was that you just mixing it up and he did not say that in which case sorry i should of left things alone because I did read your retraction and it happens to us all .

 

greybeard

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Having both an Allo Digione with Pi3 and Pi4 I would say it does not matter. They sound so alike I would find it very hard to hear or identify which is which. 

The Pi4 has the advantage of a stand alone USB controller chip while the Pi3 shares this with the network chip. Makes a big difference if you use usb out (which I do not) much quieter . But given the separation it probably lowers internal noise as well.

Also whoever said the Allo Signature has a TOSLINK output is just plain wrong it only has two SPDIF outs on RCA and BNC but of course he would know this as he is testing the unit ?
I use my Pi 4 with usb out, into a Oppo Sonica dac  (es 9038 pro chip) and it sounds superb IMO.

 
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slavedata

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Bottesford Melton
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Dave Slater
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Interesting comment here from a much admired designer of Dac and digital audio equipment about batteries for powering devices:

[SIZE=12pt][/SIZE]

[SIZE=10pt]In Sept 2018, John Westlake posted opinions about battery power on his Facebook page:[/SIZE][SIZE=12pt][/SIZE]

[SIZE=10pt]“It’s an often repeated fallacy that battery supplies are low noise - this is simply not true - battery rely on a chemical process. This chemical noise is dependent on the type of Cells used - the lowest being lead acid cells. I learnt the hard way about battery noise when designing the battery PSU for the Pink Triangle PIP II and Dacapo...[/SIZE][SIZE=12pt][/SIZE]

[SIZE=10pt]Lithium cells are VERY noisy - they have a shot-noise type distribution, worst still, most Lithium cell type battery packs use switching PSU to convert their typical cell voltage of ~ 3.6V to something more usable...[/SIZE][SIZE=12pt][/SIZE]

[SIZE=10pt]I see battery supply benefit- not so much in their claimed "low" noise performance (there is something more salient going on here) - but lower system noise due to mains isolation.”[/SIZE][SIZE=12pt][/SIZE]

[SIZE=12pt][/SIZE]

 
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Gizza

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Gary
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It was me. I confused TOS and SPDIF I agree I was wrong. I apologised up thread and suggested TOS alternatives. I know in the design of the Digione Allo specifically rejected TOS, I think but I'm not sure, because  of clocking issues with TOS.
That's correct, they found there was more jitter when using Toslink.

 

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