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Post by MartinT on Aug 7, 2022 16:28:34 GMT
Processing? No, I just send YouTube via BT from my Android tablet to the DAC. It sounds good enough for YouTube. I don't use BT otherwise, I use I2S from the U18.
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Post by MartinT on Aug 7, 2022 19:05:42 GMT
Isolation: How To Improve Your Streaming SystemHaving had a 'discussion' with someone on Facebook who yet again quoted the incorrect 'digits are digits' mantra at me, suggesting that nothing can affect the quality of the digital data once extracted, I would like to remind members once again that the enemy of digital replay is noise, specifically jitter (time domain noise) and phase noise (frequency domain noise). The best way to eliminate this noise is through isolation: to separate the digital datastream from the noise. As an example, here are the four stages of isolation I employ in my system: 1.
| 4G router. By receiving the internet feed over 4G mobile data, it is air-gapped compared with noisy telephone line or cable based internet with their kilometres of noisy lines. An exception should be FTTP (Fibre to the Premises), which should be as effective as 4G. However, i am not able to test its effectiveness. | | 2. | EtherREGEN. The ER is a reclocker which features a 'moat' isolating the incoming ethernet from the outgoing by the use of data and power isolators between the 'dirty' side and the 'clean' side. | 3.
| Optical fibre feed. Passing the internet feed down optical cable further isolates the receiving end from noise. In this case, I am using an optical SFP in the cage of the EtherREGEN, with single-mode fibre cable to the receiving SFP in the cage of the Signature Rendu. | | 4. | Gustard U18. The U18 is a reclocker which features a 'moat' isolating the incoming USB from the outgoing I2S by the use of data and power isolators between the 'dirty' side and the 'clean' side. |
So you can take one or more of the above ideas to further improve your system with some well-selected noise isolating components.
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