shemihazazel
Fractal Fanatic
How the hell is this thread still alive?
Because people keep posting to it! Buwahahahhhaahaha.
How the hell is this thread still alive?
@Paco (and/or others), I tried to search at google about device/host clock you mentioned regarding win/mac USB devices but I didn´t find anything. Where can I find any info to read up on it? Thanks in advance!
most (all?) hosts use the sample clock of the
audio interface they are using and derive timecode and the rest
internally
pwned
We didn't write the driver, Apple did. Take your complaints to them.
Cliff, once again - If you using class compliant drivers, then it's very clear who wrote them - because they were part of the operating system, this was also my statement regarding class compliant interfaces. I'm aware of this..... Blue Microphones were also used apples class compliant driver, using the same majority of functionality provided by the class driver, which is also used by the axefx II after the bootloading usb controller driver talks with the OS, saying "hey my vendor name is Fractal Audio Systems, I'm a audio class 2.0 device etc" , but what it don't says yet is "I use Fractal Audio internal clock source", instead it says: "give my your poor audio clock adoption you stupid apple piece of shit" :lol: :lol:
on windows you were using a vendor specific driver - why not also for apple
An asynchronous interface doesn't have control over the clock that the driver uses. The driver must provide rate adaption between the peripheral's clock and the system clock. This is all semantics anyways. It is not the peripheral's responsibility to tell the OS how to do it's job. The peripheral defines its function and the rest is up to the driver.
So we're talking about a host/device clock mismatch because of a sample buffer over- and underrun, right? Well the device itself can request more or less samples per milisecond from the host so a buffer over- or underrun would not occour.
Sure the windows version works well, because it don't use audio class 2.0 compliant drivers A specific core audio driver would work too....but apple doesn't support a vendor specific driver, not even on requests
What kinda guitars do you have?Sure, you're welcome! Here are some infos regarding the topic:
http://www.audioresearch.com/downloads/DAC8_white_paper.pdf
The AxeFx II features USB audio class 2.0 HS (HS means high speed, full 480Mbit bandwith) but....don't use local fixed master clock (aka device clock) - they use PC clock - at least on apple plattform. 2nd - there is no real driver for mac and since they use a bootloading usb controller, it's not a real class compliant compatible interface (real class compliant doesn't need any drivers!!!)
As mentioned before - I work for one of the biggest distributors in switzerland, as their tech. support, repair service and know approx. 95% of all the gear we sell. We're supporting Blue Microphones as part of the TC-Group product lineup from 2010 to 2011 - they had many audio class 2.0 compliant products in their portfolio - best known product I often use for a good example is the YETI PRO Mic.
Check the specs: Blue Microphones | Yeti Pro - The Ultimate Professional USB Microphone w/ Built-In XLR Output
there is no apple driver needed - it works with 10.6.4 - up to 10.8.4 and higher. On the other hand - you need a WIN driver! Why? Because there is no audio class 2.0 support on win-based systems yet!
So instead of given a bad solution to 70% of the axefx II users who using WIN-machines , FAS decided to provide a good quality WIN-solution, a real ASIO driver. ASIO is a audio stream protocol introduced by Steinberg technologies. Apple did something similar whit their OSX operation system - they put some very powerful API in their OS, one thing called Core Audio, which is directly connected to their hardware abstraction layer. This allows high performance realtime audio functionality, directly implemented in the OS.
Here is some more info for you regarding core audio:
https://developer.apple.com/library....html#//apple_ref/doc/uid/TP40003577-CH10-SW1
FAS using audio class 2.0 compliant technique, they not providing a specific "core audio driver" which would be equal to the ASIO driver for WIN...but as I mentioned above - they did class compliant without an permanent installed usb controller ( somewhere Cliff mentioned that this would be far superior - but I can't remember to see any other company who did this on a class compliant device), so you still need to bootload the controller. They also not using "device clock" aka "local fixed DAC master clock" aka "sample clock by the audio interface" etc.....they use core audio host clock instead , which "nobody really wants to use" according to this quick google find:
coreaudio-api - Re: Has nobody used CoreAudio Clock? - msg#00018 - Recent Discussion OSDir.com
So what?
@ Shadoe: Because I'm contribute even more information to it! Enjoy!
What kinda guitars do you have?
What kinda guitars do you have?