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发表于 2014-4-10 14:11:37
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metric halo 這個usb方案，不是一般的接口，首先它可以接駁幾乎所有運作平台，包括Mac, windows, linux 及ios(手機平台），其次是他家將usb介面開發成可處理192聲道。
下面是相關訊息：
Hi Folks,As you may know, at the Musikmesse last week, we announced a technology preview of the tech that we will be releasing in an upcoming upgrade for the Mobile I/O Family.
If you did not see or hear the announcement, you can watch a video of the presentation here (note the first 20 seconds or so are in German, but we switch to English after that):
Part 1:https://www.facebook.com/photo.php?v=584657858292385
Part 2:https://www.facebook.com/photo.php?v=584662884958549
To summarize:
We have announce a set of Core technologies that will form the basis of an upgrade for existing MIO's, LIOs and ULN-8s as well as the basis for future products. These Core technologies are comprised of the following:
1) USB2 Class Audio with MH sureClock transport.
- This provides 192 channel (96in/96out) communication at 1x rates
- The audio clock and the USB transport clock are decoupled in HW
2) MH Router
- This provides 1024x1024 channel router @ 192k on every unit
- The router transports audio in one sample
- All audio sources and sinks are connected via the router
- 1024 channels is large enough that it is effectively infinite3) MH Link
- Each unit has 2 MHLink ports
- Each MHLink port provides 128 channels of audio in and out @ 192k
- Audio is transported with 1 sample of latency
- This is built on the Gigabit Ethernet Physical layer
- Connections are on Cat 5
- Cables are inexpensive and ubiquitous
- Cables can run 100m between nodes
- Connections are transformer coupled, so no ground loops
- Fully integrated with the MH Router
- Transports audio clock4) MH Link + MH Router Enabling Technology:
- No more aggregate devices
- No more legacy I/O to bridge mix busses from box to box
- Makes all boxes look like one box to the mixer and the computer
5) MH Router integrates all I/O in the unit
- USB
- MH Link
- ADAT
- AES/EBU
- SPDIF
- Analog
- MADI
- Not all products will have all I/O types
6) In practice, the combination of MH Link and MH Router mean that audio can be transported from the input point on one box to the output point on the next boxwith 4 samples of latency, and each additional MHLink hop adds an additional 2 samples of latency. Since all boxes have two MH Link ports, you can chain boxes as you like. Unlike FireWire and USB, the MHLink is not a bus, so each link has the full bandwidth available to it in both directions. Since we integrate Automatic delay compensation into the system, effectively each box that you add to the system adds 2 samples of system latency.For example, if you have 8 boxes to implement a 64 channel system, the system will add 16 samples of overall latency to ensure that all channels are aligned regardless of which box it comes from. This amounts to 333 microseconds of additional latency if you are operating at 48k. At higher sample rates, the latency scales down.The presence of the router on every box means that any input on any of the boxes can be routed or multed to any output on any of the boxes. This includes the USB, which could be connected to different computers on different boxes
.7) Since the computer transport is USB Class Audio, the units can be used with any host that supports USB Class Audio -- this includes Mac OS X, iOS, Windows and Linux.
8) Of course, in keeping with our commitment to future-proof products, this is an upgrade for every FireWire interface that we have ever shipped.There have been many questions about what we discussed and I wanted to clear as many of them up as a can. Please find a bit of a FAQ below. In addition, we'll be posting a tech talk that goes into some additional detail. The talk has been recorded, and it is being edited now. |
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