From: Hamish Moffatt <hamish@cloud.net.au>
To: linux-hams@vger.kernel.org
Subject: Re: gmfsk
Date: Tue, 31 Oct 2006 10:34:13 +1100 [thread overview]
Message-ID: <20061030233413.GA2108@cloud.net.au> (raw)
In-Reply-To: <1162246448.5345.5.camel@oh2bns.ampr.org>
On Tue, Oct 31, 2006 at 12:14:07AM +0200, Tomi Manninen wrote:
> On Tue, 2006-10-31 at 08:38 +1100, Hamish Moffatt wrote:
> > I don't think there is a CW decoder anyway.
> 0.7pre1 has one.
Neat!
> > I had more success when I set the sampling rate to 48000. My sound card
> > doesn't really have the lower rates and the sample rate converter inside
> > gMFSK seems to do a better job than the ALSA one which is providing
> > /dev/dsp.
>
> This is a good suggestion. I've heard lots of complaints about the
> sample rate conversion stuff in ALSA.
ISTR that I could hear clicking in the Tx audio until I changed the
sample rate. No problem with gMFSK's internal converter.
> > Could be that gMFSK requires (inadvertently?) a full duplex sound card
> > which yours is not? Unlikely though.
>
> It shouldn't. I've tried to make gMFSK as simple as possible here:
>
> - open card for reading
> - listen and decode
> - close card
> - open card for writing
> - send
> - close card
>
> ... and so on.
>
> That should be pretty fool proof, but I guess anything is possible.
It also seems unlikely to me that Richard's M-Audio card is half duplex.
More likely something is using the playback device already.
Hamish
--
Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>
next prev parent reply other threads:[~2006-10-30 23:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-29 16:07 gmfsk richard
2006-10-29 21:31 ` gmfsk Hamish Moffatt
2006-10-29 22:42 ` gmfsk richard
2006-10-30 17:31 ` gmfsk richard
2006-10-30 21:38 ` gmfsk Hamish Moffatt
2006-10-30 22:14 ` gmfsk Tomi Manninen
2006-10-30 22:47 ` gmfsk Al Bolduc
2006-10-30 23:34 ` Hamish Moffatt [this message]
2006-10-30 23:39 ` gmfsk Dave Platt
2006-10-31 1:26 ` gmfsk Hamish Moffatt
2006-10-30 23:44 ` gmfsk richard
-- strict thread matches above, loose matches on Subject: below --
2006-10-29 16:40 gmfsk richard
2004-01-20 21:14 gMFSK Erik Jakobsen
2004-01-20 21:35 ` gMFSK Tomi Manninen
2004-01-21 0:06 ` gMFSK Wilbert Knol
2004-01-21 6:07 ` gMFSK Erik Jakobsen
2004-01-21 8:27 ` gMFSK Wilbert Knol
2004-01-21 7:59 ` gMFSK Joni Bäcklund
2004-01-21 8:13 ` gMFSK Erik Jakobsen
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