USB sound suggestion

[wafflesomd]

Ok, I really hate to have to suggest something like this.  Becuase I know you guys work har don this, and if I want it, I should code it myself, too bad I dont have any coding experience.

Anyways.

I posted this on misticriver, but I thought it would be a good idea if we could get sound to be played through the usb port to a 3.5 jack.

I thought of this becuase of a recent ipod amp I saw.  The audio came from the usb port, rather than the already amped, headphone jack.

I assume this would help the quality of the song.

Good Idea?  Possible?

[soap]

The ipods don't have a solo USB connector, they have a "dock connector" with lots of pins besides USB.  There is a line-out on the dock connector.  That is what the amp was connected to.  Line-out adapters can be purchased, or made quite easily.
If you are going to use a headphone amp, yes, it is a good idea to run it off the line-out connector.

[Genre9mp3]

It's possible to stream audio via the USB port on devices with USBOTG (H300, iAudio X5) Though, it's not easy to do that at all, since we have to be able first to control the USBOTG chip (hard task on H300, harder on X5 due to lack of documentation). In other words, don't expect this soon.

[wafflesomd]

Is there dock support for rockbox and the h10 yet?

Does the h10 by defualt, supply sound to the headphone jack and the usb slot?

If so, shouldnt the usb cable just work with the Left/Right and Ground connectors to a .25, 3.5 or whatever you choose.

[Llorean]

Please try to use whole words as per our posting guidelines.

[saratoga]

Is there dock support for rockbox and the h10 yet?

For the Ipod yes.  The H10 has no dock, so we cannot support it.

Does the h10 by defualt, supply sound to the headphone jack and the usb slot?

I don't think its possible to do this on any player.   You can send audio over a USB port, but the device connected would need to be able to understand what it was connected to.  I'm not sure that any such devices exist, though I could be wrong.

If so, shouldnt the usb cable just work with the Left/Right and Ground connectors to a .25, 3.5 or whatever you choose.

USB is a digital bus operating at 480MHz.  Theres nothing to hook analog connectors up to, so no.

[wafflesomd]

Sry to disagree, but the h10 does have a dock.

Pictured here:

http://www.k55.ch/out/oxbaseshop/html/0/dyn_images/1/dockh1020_p1.jpg

Also, when asking to record with "line in" with the original firmware, it asks to to connect to irier to the dock.

[Genre9mp3]

I don't think its possible to do this on any player.   You can send audio over a USB port, but the device connected would need to be able to understand what it was connected to.  I'm not sure that any such devices exist, though I could be wrong.

There are some DAC devices that use USB to digitally receive audio and convert it to a clean analog signal as well as USB speakers.

But as I said, only USBOTG players are able to stream audio. Players that use standard USB, can only act as a USB peripheral. This means that they lack of the necessary controls to transfer data. They depend on a USB host (PC) for that.

[wafflesomd]

Hmmmm, this sucks.

Puts a damper on my little project.

Plz dont get mad at me if you've answered this question yet:

Can rockbox be coded to output sound to these selected pins, possibly, override them, I dont really know how to explain it.

/edit

Ok, this mgiht help:

Can you get it to act as the host?

I beleive the h1xx series can do this (though I'm pretty sure they have usbotg support)

Hmmm, poopy.

[Febs]

Plz

For the second time, our posting guidelines *require* the use of whole words.

I beleive the h1xx series can do this (though I'm pretty sure they have usbotg support)

The H100 series does not support USBOTG.  You may be thinking of the S/PDIF support.

What exactly is it that you are trying to do that can't be accomplished with an analog line out?

[wafflesomd]

Getting the audio from the usb port would make it, for lack of a better word, "pure" , instead of being amplified by the h10, it is amplified by an extrenal amp, which in basically all cases, would be better.

[Llorean]

The rules are not because *we* don't know what it means. The rules are because most computer translation does not know what it means. These rules are enforced so that people who must use screen readers or translation tools can still understand the text in these forums.

[Genre9mp3]

Getting the audio from the usb port would make it, for lack of a better word, "pure" , instead of being amplified by the h10, it is amplified by an extrenal amp, which in basically all cases, would be better.

If h1xx is your player... except of the fact that it is not capable of streaming audio via the USB port, there is no need to, as well. You see, these players have S/PDIF which in other words mean that they are already capable to output "pure" digital audio.

[wafflesomd]

No, its an h10.

[Febs]

Getting the audio from the usb port would make it, for lack of a better word, "pure" , instead of being amplified by the h10, it is amplified by an extrenal amp, which in basically all cases, would be better.

You do realize that you would then need an external DAC as well as an amp, don't you?