vgetty OGM is very, very soft

• Messages sorted by:[ date ][ thread ][ subject ][ author ]

> -----Original Message-----
> From: Brian McGovern [mailto:bmcgover@cisco.com]
> Sent: Friday, 25 June 1999 00:06
> To: craigs@equival.com.au
> Cc: mgetty@muc.de
> Subject: re: vgetty OGM is very, very soft

> >  My last problem is that the outgoing message is barely
> audible. This is
> >the second time I've had this problem with a Rockwell
> chipset, and it is the
> >only problem I'm having with vgetty and the current modem.
>
> Have you tried tweaking the gains on the modem? Its entirely
> possible, being
> from Rockwell, that the defaults are silly.

How do you change the gain?

I've been through the Rockwell.c file, and the transmit_gain variable (as
set in the voice.conf file) is not used!

I modified Rockwell.c to output AT#TL=7FFF during the init sequence, but
this command generates an error when used. A closer inspection of the
documentation reveals that this comand appears to apply only to the
handeset/speaker, not the output volume, as the docs say thatthis command
will "generate an error what the phone line is selected", whatever that
means.

> >  The OGM was plenty loud enough using another modem (not
> Rockwell), and the
> >source WAV file seems to be pretty loud. Using a recorded
> .rmd file as the
> >OGM also seems a very soft. However, the beep at the end of
> the message is
> >just fine.
>
> This sounds like a gain issue. If I remember correctly (read: I'm
> probably wrong), the beep is generated by the modem to a
> specific tone and
> volume, and is not linked to the output gain.

I though this might have been the case =8^(!

> >  Does anyone have any ideas? Are there some hints to
> recording suitable
> >OGMs for use with Rockwell modems?
>
> Well, one could record it REALLY loudly, and let the low-gain
> of the modem
> bring it back down to more "normal" ranges. But, I doubt you
> want to scream
> in to a telephone or mic. in order to record it in the first
> place. Also sounds
> a little silly :)

My thoughts exactly.

> In any event, even if the default gain is set reasonably, you
> may want to beef
> if up in your case.

But how?

   Regards,

      Craig Southeren

 -------------------------------------------
 Equivalence - home of FireDoor, MibMaster & PhonePatch

 Email: equival@equival.com.au
 Web:   http://www.equival.com.au
 Fax:   +61 2 4368 1395        Voice: +61 2 4368 2118
-----------------------------------------------------