Subject: From: Date:

Re: [ECS] Continuing modem stutter problems Mark Gilmore Sun, 21 Feb 1999 08:53:39 -0800

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Ingo, this sounds very much like another program is
"grabbing" the CPU during playback.

Ingo Dean wrote:
> 
> I'm still having problems with ECS 4.0 stuttering when playing a
> Phone-Recording-C to the modem.
> 
> What's odd here is that playing the same Phone-Recording-C file to the
> soundcard (Play->VC) sound perfect.  But when I send it to the modem
> (Play->HS), it stutters, with the "RD" light on the modem flashing
> during every pause.  It plays about 1 1/2 seconds, pauses for 1/10 of a
> second or so, plays another 1 1/2 seconds, pauses, etc.  (The pauses are
> very short, but long enough to break up the words to where they're not
> understandable).  Another way of saying this: If I record a single long
> tone using the handset and play it back to the soundcard (play->VC) it
> sounds perfect, but if I play it back to the modem (Play->HS) it breaks
> it up into multiple 1 1/2 second long tones.
> 
> It's a Zoom model 2835 external modem on COM2.  COM2 is setup for 115200
> baud, hardware flow control.  The modem is also setup for 115200 baud,
> (8N1 parity) with hardware flow control in the Modems control panel.
> The FIFO's are both set to maximum.  All on a Pentium 200MMX with an
> Asus P55T2P4 motherboard with "2 high-speed UART compatible serial
> ports".
> 
> It seemed like a flow-control problem, but didn't go away when I made
> sure the baud rates were nice and high and it was using hardware flow
> control.  I rebooted after every change, and held the shift key down
> while logging in to make sure no other programs are running.  But if
> it's a flow-control problem, it should also do it when recording from
> the voice modem, right?
> 
> I've tried every combination of flow-control, baud rates, and FIFO
> settings, but nothing makes a difference. Maybe I need a different
> modem?
> 
> Is anyone else seeing this?  Would you all try to reproduce this and let
> me know if it's my system, or if ECS is causing it?  Just create a
> Phone-Recording-C item, record a continuous tone into it, and play it
> back to both your soundcard and to the handset.
> 
> --
> Work: mailto:Ingo_Dean@MentorG.com  Personal: mailto:idean@iname.com
>               http://www.geocities.com/Hollywood/Hills/2948/

-- 
Mark Gilmore
Omnipotence (ECS Home Automation Software)
omnip@usit.net
http://www.usit.com/omnip

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