XMOS-based Asynchronous USB to I2S interface

[rsdio]

Originally Posted by 1audio

UAC1 and UAC2 are enough different that the device can't switch dynamically between them. In UAC2 it seems all the communications are at high speed even for a 44.1 file. It sort of makes sense because negotiating a high speed link is a little involved and you don't want to switch once engaged. UAC reserves some bandwidth for the audio stream (what they mean by isochronous) so the audio won't get hammered by a disk transfer on the same host. At lower data throughput it probably releases more bandwidth for other transfers.

You are correct. If the Device starts in UAC1, then it probably won't even list 192 kHz as an option in the Descriptors. If the Device starts in UAC2, then it's going to require a disconnect and reconnect or a USB rescan to change to the slower bus speed of UAC1.

However, a Device can have multiple Alternate Interfaces, and that's where different amounts of bandwidth for the Isochronous endpoints are specified. So, when a UAC2 Device switches from 192 kHz to 44.1 kHz, the selected Alternate Settings will be using less bandwidth, leaving the rest for other Devices on the USB.

In other words, the USB Audio Device does not change bus speed, but it does change the percentage of the available bandwidth that it reserves and uses.

[Ryelands]

Originally Posted by 1audio

In UAC2 it seems all the communications are at high speed even for a 44.1 file.

It does indeed make sense and would also explain why the isolator doesn't work with the WaveIO. Thanks for that.

[pinnocchio]

Here's something some of you without MACs will probably enjoy...!

Since WaveIO is natively supported in OSX and not in Windows, some of you probably wish they had a MAC. (I don't... )

There's a USB dongle called EFI-X (V2 or V3, older version like V1.1 only support MAC OSX to a certain version).

This dongle is capable of booting a RETAIL copy of MAC OSX as well as any other PC supported OS like Windows and Linux.

It boots MAC OSX natively (not virtualized and not Hackingtosh) from the retail original copy and installs without issues. Works like a charm but make sure you check the ACL since not all CPUs, Motherboards and GPUs are supported. But the list is pretty good. I believe it requires at least a Core 2 Duo and higher processor and maybe some AMDs as well...

I have a friend in the US using it with V2 and loves it

You can actually go to youtube and look for EFI-X

So this should make some WaveIO fans happy!

Ciao!
Do

[Telstar]

Paging Lorien

[soundcheck]

Originally Posted by pinnocchio

Here's something some of you without MACs will probably enjoy...!

Since WaveIO is natively supported in OSX and not in Windows, some of you probably wish they had a MAC.

Hmmh. Most of the USB HiRes DAC users out there use the generic Thesycon USB driver under Windows 7.

Is the WaveIO not working with that driver under W7?

[pinnocchio]

Originally Posted by soundcheck

Hmmh. Most of the USB HiRes DAC users out there use the generic Thesycon USB driver under Windows 7.

Is the WaveIO not working with that driver under W7?

No, working great and it is what I'm using. Just pointing out alternatives

Do

[jrling]

Many postings suggest that it is a scam? Ripping off others' software from Chameleon et al - see here from Toms Hardware which is a reputable site - Exclusive Report: EFI-X Mac Booter, A Scam?

Must say I wouldn't touch it especially as it costs 175 Euros + shipping and also almost certainly infringes Apple's licence terms.

[pinnocchio]

Originally Posted by jrling

Many postings suggest that it is a scam? Ripping off others' software from Chameleon et al - see here from Toms Hardware which is a reputable site - Exclusive Report: EFI-X Mac Booter, A Scam?

Must say I wouldn't touch it especially as it costs 175 Euros + shipping and also almost certainly infringes Apple's licence terms.

To infringe on Apple's licence is of course 1000000% true as just farting infringe on it and you might also get sued for iFart!

My friend uses the v2 or v1.1 and was going to get v2 on the hype. His experiences are mostly positive not saying there is not any bumps or hickups though... Like I said I'm happy with my PC!

Do

[yammy1688]

I picked up Lorien's board a ways back and haven't been up to date with any new firmware/drivers. I'm still using the luckit drivers.

I looked over thesycon's website, Is the USBIO generic USB device driver the one that is appropriate for this?

Originally Posted by pinnocchio

No, working great and it is what I'm using. Just pointing out alternatives

Do

[Lorien]

Entirely my fault, I apologies for this mess; here it is (v1.56.0)!
Cheers,
L