Two decays?

[Carey Carlan]

A new phenomenon. Recording in a different, large hall, I'm hear a
loud, fast decay and another very faint but much longer decay. Imagine
recording in a dead hall with an attached stairwell.

Anyone ever heard of such a thing?

[T Maki]

Sure. It's what one would expect, especially if doors are
opened through to the other space or there are other ways
for the air in one space to be influenced by the moving of
the air in the other.

About a year ago I did a surround recording of a choral
group in their normal performing venue with exactly that
characteristic. The title of the album was "Echoes" and
featured pieces written specifically for antiphonal choirs.
One piece by Orlando di Lasso ("Echo Song") was done in such
a way as to exploit three distinct acoustical personalities
of this building - the main hall, the organ/choir loft, and
the reverberant stair/hallway leading to the basement and up
to the choir loft. It is a very contemporary structure in
terms of architecture and is not your typical
narthex/nave/chancel arrangement. In this case, all
passageways and doors were opened to provide the best
opportunity to capture what was going on.

Bottom line - if the effect of multiple acoustic spaces and
characteristics is what you're looking for, exploit it with
care. If not, take care not to.




TM


Carey Carlan wrote:
>
> A new phenomenon. Recording in a different, large hall, I'm hear a
> loud, fast decay and another very faint but much longer decay. Imagine
> recording in a dead hall with an attached stairwell.
>
> Anyone ever heard of such a thing?

[Scott Dorsey]

Carey Carlan > wrote:
>A new phenomenon. Recording in a different, large hall, I'm hear a
>loud, fast decay and another very faint but much longer decay. Imagine
>recording in a dead hall with an attached stairwell.
>
>Anyone ever heard of such a thing?

Yes. I bet you have two halls connected together. Or one big hall, and a
big backstage area connected together. Or one big hall split into two halves
by a balcony, and the two halves have different reverb times. OR one hall
with a drop ceiling that goes to a very long air plenum (which is the case
in our local movie theatre).
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Carey Carlan]

(Scott Dorsey) wrote in
:

> Carey Carlan > wrote:
>>A new phenomenon. Recording in a different, large hall, I'm hear a
>>loud, fast decay and another very faint but much longer decay.
>>Imagine recording in a dead hall with an attached stairwell.
>>
>>Anyone ever heard of such a thing?
>
> Yes. I bet you have two halls connected together. Or one big hall,
> and a big backstage area connected together. Or one big hall split
> into two halves by a balcony, and the two halves have different reverb
> times. OR one hall with a drop ceiling that goes to a very long air
> plenum (which is the case in our local movie theatre).

Bingo. Further research yielded a door now permanently open for a handicap
ramp that led into a long hallway.

"Carey Carlan" > wrote in message
. 205...
> (Scott Dorsey) wrote in
> :
>
> > Carey Carlan > wrote:
> >>A new phenomenon. Recording in a different, large hall, I'm hear a
> >>loud, fast decay and another very faint but much longer decay.
> >>Imagine recording in a dead hall with an attached stairwell.
> >>
> >>Anyone ever heard of such a thing?
> >
> > Yes. I bet you have two halls connected together. Or one big hall,
> > and a big backstage area connected together. Or one big hall split
> > into two halves by a balcony, and the two halves have different reverb
> > times. OR one hall with a drop ceiling that goes to a very long air
> > plenum (which is the case in our local movie theatre).
>
> Bingo. Further research yielded a door now permanently open for a
handicap
> ramp that led into a long hallway.

Wow... amazing that a single door could contribute that much, relative to
the overall space you're probably dealing with.
--


Neil Henderson
Saqqara Records
http://www.saqqararecords.com

[Carey Carlan]

> wrote in
:

> "Carey Carlan" > wrote in message
> . 205...
>> (Scott Dorsey) wrote in
>> :
>>
>> > Carey Carlan > wrote:
>> >>A new phenomenon. Recording in a different, large hall, I'm hear a
>> >>loud, fast decay and another very faint but much longer decay.
>> >>Imagine recording in a dead hall with an attached stairwell.
>> >>
>> >>Anyone ever heard of such a thing?
>> >
>> > Yes. I bet you have two halls connected together. Or one big hall,
>> > and a big backstage area connected together. Or one big hall split
>> > into two halves by a balcony, and the two halves have different reverb
>> > times. OR one hall with a drop ceiling that goes to a very long air
>> > plenum (which is the case in our local movie theatre).
>>
>> Bingo. Further research yielded a door now permanently open for a
> handicap
>> ramp that led into a long hallway.
>
> Wow... amazing that a single door could contribute that much, relative to
> the overall space you're probably dealing with.

Well, I said it was "very faint".

[Scott Dorsey]

> wrote:
>"Carey Carlan" > wrote in message
. 205...
>> (Scott Dorsey) wrote in
>> :
>>
>> > Carey Carlan > wrote:
>> >>A new phenomenon. Recording in a different, large hall, I'm hear a
>> >>loud, fast decay and another very faint but much longer decay.
>> >>Imagine recording in a dead hall with an attached stairwell.
>> >>
>> >>Anyone ever heard of such a thing?
>> >
>> > Yes. I bet you have two halls connected together. Or one big hall,
>> > and a big backstage area connected together. Or one big hall split
>> > into two halves by a balcony, and the two halves have different reverb
>> > times. OR one hall with a drop ceiling that goes to a very long air
>> > plenum (which is the case in our local movie theatre).
>>
>> Bingo. Further research yielded a door now permanently open for a
>handicap
>> ramp that led into a long hallway.
>
>Wow... amazing that a single door could contribute that much, relative to
>the overall space you're probably dealing with.

If it does... it is probably a slap echo, or something close to it. This
is not good.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Don Cooper]

Carey Carlan wrote:

> > Wow... amazing that a single door could contribute that much, relative to
> > the overall space you're probably dealing with.
>
> Well, I said it was "very faint".


I believe that's the Doppler Effect.

Try some WD-40.

[Don Cooper]

Carey Carlan wrote:

> > Wow... amazing that a single door could contribute that much, relative to
> > the overall space you're probably dealing with.
>
> Well, I said it was "very faint".


I believe that's the Doppler Effect.

Try some WD-40.

[Ricky W. Hunt]

"Don Cooper" > wrote in message
...
>
>
> Carey Carlan wrote:
>
>> > Wow... amazing that a single door could contribute that much, relative
>> > to
>> > the overall space you're probably dealing with.
>>
>> Well, I said it was "very faint".
>
>
> I believe that's the Doppler Effect.
>
> Try some WD-40.

I nominate WD-40 for the official RAP Lubricant. (lets see what that
starts).

[Ricky W. Hunt]

"Don Cooper" > wrote in message
...
>
>
> Carey Carlan wrote:
>
>> > Wow... amazing that a single door could contribute that much, relative
>> > to
>> > the overall space you're probably dealing with.
>>
>> Well, I said it was "very faint".
>
>
> I believe that's the Doppler Effect.
>
> Try some WD-40.

I nominate WD-40 for the official RAP Lubricant. (lets see what that
starts).