Re: full duplex (future)
Re: full duplex (future)
- Subject: Re: full duplex (future)
- From: Bill Stewart <email@hidden>
- Date: Wed, 13 Jun 2001 11:50:32 -0700
on 10/6/01 7:58 AM, James McCartney wrote:
>
On my powerbook there is one device that is input-only and one that is
>
output-only. This is a step backward from ASIO which gives you both at once.
>
So in order to do full duplex processing I would have to contrive something
>
to save away the input as I once did with sound manager (and which I presume
>
the ASIO SoundMgr driver is actually doing).
>
>
It would be nice if I could get both input and output in the same device and
>
IOProc. Why is this not the case?
It is NOT a problem in the design of the audio architecture, rather it was
the way that the built in hardware drivers were implemented in the current
release.
We will address this issue and fully expect to fix this at some point in the
future for built-in hardware and provide a single device with IO streams
where that is possible.
USB Audio devices appear as separate devices because of the way that USB
interfaces work and the matching processes, etc, that the USB spec provides.
We've had some conversations about this and whether we can work around this
in some way - currently I don't believe that we can.
PCI cards will hopefully have drivers written that will publish an unified
IO cycle. For many of them I would fully expect this feature.
It boils down to how the hardware works, and how the driver for that
hardware can best publish its capabilities.
In addition to this we also see that there are some things we can do to make
this kind of task easier to manage (ie. presenting some kind of I/O stream
where the I and the O are from different devices). I'll release details of
that as we complete that work. Any ideas or features you'd like to see can
be addressed to me privately (or posted to the list if you want some
discussion about them).
Thanks
Bill
mailto:email@hidden
tel: +1 408 974 4056
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| >full duplex (From: James McCartney <email@hidden>) |