From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hamish Moffatt Subject: Re: gmfsk Date: Tue, 31 Oct 2006 10:34:13 +1100 Message-ID: <20061030233413.GA2108@cloud.net.au> References: <4544D1A7.3010103@blueyonder.co.uk> <20061029213157.GA25286@cloud.net.au> <45452E68.9060601@blueyonder.co.uk> <454636E0.6090009@blueyonder.co.uk> <20061030213843.GB25496@cloud.net.au> <1162246448.5345.5.camel@oh2bns.ampr.org> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <1162246448.5345.5.camel@oh2bns.ampr.org> Sender: linux-hams-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hams@vger.kernel.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