_____
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Tom
Betka
Sent: Saturday, February 17, 2007 8:48 AM
To: flightgear-devel@lists.sourceforge.net
Subject: [Flightgear-devel] Better audio for FG
Hello all,
I am new to FG and to the developer list. I sent an earlier e-mail around to
this effect but am not certain that it actually made it to the list, so I
will try it again.
In a recent developer's e-mail thread, the need for improved audio was
briefly discussed. I may be able to help in this regards.
In addition to being a budding programmer and long-time flight sim fan, I am
a 25+ year pilot and have been a CFII/A&P for 20 years. I also own a 1967
Piper Aztec. In addition I have what amounts to a PC-based home recording
studio with several mid/high quality condenser mics and some of the latest
in sound gear, including Sonar software. It would not be at all difficult to
obtain audio samples of both reciprocating and turbine engine starts &
shut-downs, at the very least.
I suppose what we need is a list of audio products needed. If I knew the
kinds of things you guys think the FG project needs, I would be able to tell
you how I could contribute to the project. Incidentally, I also have access
to the cockpits of various types of aircraft for panel pictures. Once
again--all I need to know is the types of things that are needed.
One last thing--I work as a physician, so sometimes my schedule can be a bit
hectic. But as our Wisconsin weather warms over the next couple of months,
there is no reason that I can't get several new audio samples.
Tom Betka
Green Bay, WI
Having been involved slightly in the audio portion of a Level C flight
simulator, one of the hardest parts of recording aircraft sounds is that you
need isolated sounds. These isolated sounds are then combined as events
happen to generate the entire spectrum of noise in the cockpit.
For example, It's not any fun trying to get the sound of the gear operating
if the engines are running and you have air rush. The solution for that
particular problem is that you need to have the aircraft on jackstands in a
hanger where there is nothing going on. For this not-for-profit, volunteer
effort, it's not practical for you to pay to have your aircraft placed on
jackstand and cycle the gear. However, if you have something schedule that
involves jackstands, or you are wandering through a hanger and there is
someone working on an aircraft in such a situation, grab your recorder.
Some of the other items of value are sounds such as stall warnings, various
avionics noises, espcially such as the autopilot would make when a taret
altitude is reached. These can't always be isolated, but oft-times they are
generated tones of a certain frequency and cycle time. Recording them allows
someone later to determine the frequency and cycle time and then artifically
generate these sounds.
Microphone placement is another important issue. Placing it near the pilot's
ear is a good place, hanging rather than lying on a surface.
Hope this helps.
Bill
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