usb redriver

[doitttt]

put redriver in between from laptop to dac
A "Reclocker" performs an UP-shaping of the waveform of the digital signals with additional low output impedance, so that the cables' capacitive
load and any impedance mismatch have no or - at least - minor importance.
The sharper the digital signals are, the more precisely the signal is processed the rest of the way through the DAC. That's what you hear as
result of
https://dk.rs-online.com/web/p/kommunikation-og-tradlos-udvikling/2659953
gives better sound

What Is a USB redriver? | Video | TI.com

This video discussed the role USB redrivers play in device connectivity

www.ti.com

 

[DVDdoug]

A solution looking for a problem.

There are rarely audio problems caused on the "digital side" and if you do have digital corruption or errors the sound is usually terrible.

This is the beauty of digital... As long as a "1" remains a "1" and a "0" remains a "0", everything is good. Digital data goes all over the world (including this thread) through all kinds of wired & wireless connections with no problems.

Timing errors and "jitter" are normally way-way too small to he audible, except if the clock in your soundcard is off the speed & pitch can be off, or if you are sending real-time data over the Internet it can get interrupted and you can get glitches/dropouts.

 

[Ron Texas]

Sometimes placing a USB2 hub between a DAC and a USB3 port will solve a gross problem like stuttering.

 

[doitttt]

usb redriver only converts pure square signal
much better all decrap you put to the usb port

 

[popej]

It is a circuit for active USB cables, usually with length of 5m or greater. You should use one for a remote DAC

 

[doitttt]

3 meters its max

 

[voodooless]

gives better sound

And you have proof of this?

In any case, this product should not cost more than € 20. It’s two 2 euro chips and a few USB connectors…

 

[wwenze]

put redriver in between from laptop to dac
A "Reclocker" performs an UP-shaping of the waveform of the digital signals with additional low output impedance, so that the cables' capacitive
load and any impedance mismatch have no or - at least - minor importance.
The sharper the digital signals are, the more precisely the signal is processed the rest of the way through the DAC. That's what you hear as
result of
https://dk.rs-online.com/web/p/kommunikation-og-tradlos-udvikling/2659953
gives better sound

What Is a USB redriver? | Video | TI.com

This video discussed the role USB redrivers play in device connectivity

www.ti.com

Isn't it interesting that the reference documentation linked always do not contain any mention or support of the claims being presented.

 

[Chrispy]

WTF?

 

[kchap]

I think redriver is designed for the Gb/s speeds of usb 3.n devices, not the Mb/s of usb 2 devices. As far as I'm aware all the usb DACs tested and/or discussed in ASR are usb 2. In any case its function is to ensure that even where the io chipset is some distance from the usb connector, the signals at the connector will be compliant.

Just to clarify a fully compliant usb 3.n connector will have 2 sets of data lines. A tx and rx pair carrying at least 5Gb/s full duplex usb3.n data and a single half duplex pair carrying up to 480Mb/s usb 1/2 data.

 

[doitttt]

the usb cable with redriver works like an optical cable
with pure square curves it behaves like optical cable
if you don't, read some more literature

 

[NTK]

From the video transcript. This device is for high speed signals transmitted on long signal paths that can cause signal attenuation and signal timing problems, which will result in data corruptions.

These input and output eye diagrams are from the TUSB501 datasheet. If your eye is not stressed like the first (input) diagram, there is no benefit to using this redriver. Notice that the data rate for these signals are 5 Gb/s.
And the signals are not "pure square waves". If they are, you are leaving a lot of bandwidth on the table.

 

[kchap]

the usb cable with redriver works like an optical cable
with pure square curves it behaves like optical cable
if you don't, read some more literature

The redrivers are:

• Equalizers, they do not perform clock extraction, re-timing and re-shaping. Thanks @NTK
• Work on the 5Gb/s usb 3.n signals, not the usb 2 signals used by most DACs.
• Intended to cleanup usb 3.n signals across circuit boards.

They are a waste of time for DACs.

 

[voodooless]

The redrivers are:

• Equalizers, they do not perform clock extraction, re-timing and re-shaping. Thanks @NTK
• Work on the 5Gb/s usb 3.n signals, not the usb 2 signals used by most DACs.
• Intended to cleanup usb 3.n signals across circuit boards.

No, the board contains two chips, also one for USB 2.0.

They are a waste of time for DACs.

Yes!

the usb cable with redriver works like an optical cable

No it does not! There is no galvanic isolation, there is no signal conversion.

with pure square curves it behaves like optical cable
if you don't, read some more literature

We still haven’t seen you prove it improves audio quality…

 

[pseudoid]

TL&DR: I am imagining this killer audio system, built around a killer streaming DAC along w/this USB reclocker and that Muon Pro Ethernet filter.

 

[kchap]

No, the board contains two chips, also one for USB 2.0.

Noted. In my defence your worship, the video concentrates on usb 3 redrivers.

 

[voodooless]

Noted. In my defence your worship, the video concentrates on usb 3 redrivers.

There is a video ? I only just saw it after you mentioned it

I just jumped on the datasheets of the chips.

 

[popej]

3 meters its max

In most cases, you don't need redriver for 3m.

USB Active Extension Cables | Eaton

Need Help Finding USB Active Extension Cables? Tripp Lite's USB Active Extension Cables increase the distance between 2 connected USB-A or USB-C devices, including Chromebooks, MacBook Pros or Windows laptops, without signal loss and allow you great flexibility in placing equipment in your data...

tripplite.eaton.com

 

[fpitas]

with pure square curves

I'll reiterate: that's not what high-speed digital ever looks like. See the eye diagrams in post #12.

 

[fpitas]

In most cases, you don't need redriver for 3m.

USB Active Extension Cables | Eaton

Need Help Finding USB Active Extension Cables? Tripp Lite's USB Active Extension Cables increase the distance between 2 connected USB-A or USB-C devices, including Chromebooks, MacBook Pros or Windows laptops, without signal loss and allow you great flexibility in placing equipment in your data...

tripplite.eaton.com

Yes, but somebody wants you to buy their goofy gizmo nonetheless.