Re: setting mic volume
Re: setting mic volume
- Subject: Re: setting mic volume
- From: Brian Willoughby <email@hidden>
- Date: Sun, 2 Nov 2008 13:29:36 -0800
Daniel,
There are certainly professional preamps with remote/electronic-
controlled volume/gain on the inputs. However, it seems that few or
perhaps none of the manufacturers have written CoreAudio drivers to
expose these gain controls. I think that their collective market
analysis is that people prefer to use the custom software for
controlling these preamps, rather than the generic interface provided
by CoreAudio. Perhaps they also prefer to keep these controls
proprietary, rather than expose them for any software to use.
Whether it's the difficulty of implementation, lack of customer
demand, or desire to remain proprietary, one can only guess - and the
reasons may be different for each manufacturer with capable gear.
What you're asking for is valid, and it is technologically possible,
but it seems that we're at the stage where customers need to demand
the feature from vendors. The vendors must modify their audio
drivers to support this. Of course, this is a chicken-and-egg
situation, because your software would add to the incentive, but you
want to test your software with existing hardware, so which comes first?
Meanwhile, I've made a mental note to check all of my interfaces for
CoreAudio support, but it will take me a while to find the time with
my gear scattered among multiple locations. However, others on this
list will give individual reports on specific pieces of gear.
Good luck,
Brian Willoughby
Sound Consulting
P.S. Is there any part of the FireWire specification which would
allow an audio device to describe such controls in a generic way that
would not require a custom driver? My impression is that all
FireWire audio devices require a custom driver. Or, to phrase my
question from a different angle: Does the Apple FireWire audio
(generic) driver have any support for automatically detecting input
channel gain controls and exposing them through the CoreAudio
standard API?
On Nov 2, 2008, at 12:50, John Pitcairn wrote:
I would be grateful if anyone could tell me of any mixer/preamps
that support this.
I think you'll be hard-pressed to find anything that exposes this to
the HAL.
You could consider looking for something that allows digital control
over (analog) preamp input level via the Mackie Control protocol, and
use that to control your input trim. Possibly the Metric Halo units,
though I think you might currently need a "legacy" (non-2D) unit for
this?
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