[rec.audio.high-end] dbx 224 info

dbk@tove.cs.umd.edu (Dan Kozak) (01/07/91)

Hi folks!  I recently purchased a used dbx 224 Simultaneous
Encode/Decode Type II Noise Reduction System from a local music store
(Chuck Levin's).  It came with no documentation, but I've found a
place to order it.  On the other hand, I'd like to start playing with
it immediately :-) but someone has craftily reset the trim pots in the
back that adjust the record and playback levels.  Does anyone out
there know the procedure for setting these?  I'd love to know . . .

#dan

Clever:         dbk@mimsy.umd.edu | "Softly her tower crumbled in the 
Not-so-clever:  uunet!mimsy!dbk   |  sweet silent sun." - Nabokov

hull%janus.Berkeley.EDU@ucbvax.Berkeley.EDU (Christopher Hull) (01/08/91)

In article <8730@uwm.edu> you write:
>
>Hi folks!  I recently purchased a used dbx 224 Simultaneous
>Encode/Decode Type II Noise Reduction System from a local music store
>(Chuck Levin's).  It came with no documentation, but I've found a
>place to order it.  On the other hand, I'd like to start playing with
>it immediately :-) but someone has craftily reset the trim pots in the
>back that adjust the record and playback levels.  Does anyone out
>there know the procedure for setting these?  I'd love to know . . .
>
>#dan
>
>Clever:         dbk@mimsy.umd.edu | "Softly her tower crumbled in the 
>Not-so-clever:  uunet!mimsy!dbk   |  sweet silent sun." - Nabokov

The record and play trim pots on the dbx are not critical.  Just set them
for whatever gives reasonable levels for your system.  I.E. set the record
level so that your tape deck has reasonable input signal strength (but not
too much) and set the playback level so that the overall level as about
like what the cassete deck would usually be without dbx (subjectively).

In general it is better to set the levels too low than too high.  That will
at worst add a tiny bit of noise to your system.  Setting them too high, as
a friend of myne once did on a live recording can cause tragic results  
(specifically clipping of the dbx) , ruining a live recording session.
Set them high enough though so that you can successfully get your record level
to peak out above the dolby level (or 0 vu), and so you can play your tapes
back at a loud level.


Chris Hull

Hull@janus.berkeley.edu