Date: Thu, 21 Feb 2002 18:51:17 +0100 From: "Daan Vreeken [PA4DAN]" <Danovitsch@Danovitsch.dnsq.org> To: FreeBSD-multimedia@FreeBSD.org Subject: Re: No FM synthesizer in PCI soundblasters? Message-ID: <02022118511701.03193@FreeBSD.Danovitsch.LAN>
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On Thursday 21 February 2002 18:19, you wrote: > On Thu, 21 Feb 2002 17:13:57 +0100 > > "Daan Vreeken [PA4DAN]" <Danovitsch@Danovitsch.dnsq.org> wrote: > > Hi, > > > > I have a FreeBSD machine that's playing music via it's SoundBlaster > > PCI128. I want to create some beep's with it, during the music, through > > the soundcard. > > > > Opening /dev/midi0 or /dev/sequencer0 just gives "Device not configured". > > And opening /dev/dsp0 and trying for example ioctl "SNDCTL_SYNTH_INFO", > > gives me "Invalid argument". > > > > Is my PCI-soundcard just not equipped with a FM synthesizer, or am I > > missing something here? > > > > What I am trying to do is playing short tones while some other program is > > playing sound. If there is any other way to do this, other than > > in-software mixing the two streams (music & tones) into one, I would like > > to know how :) > > You could let the FreeBSD kernel mix the two streams for you, by using > vchans. Try playing with the sysctl hw.snd.pcm0.vchans (I have it set to 4) > and then opening /dev/dsp0.[0123]. > > It works quite OK for me, for example I have XMMS set to use /dev/dsp0.3, > so other programs won't give me a "Device busy" if I try to utilize > /dev/dsp while I'm playing an MP3... The system is currently running FreeBSD 4.3-RELEASE, and it has no "vchans". Since what version of FreeBSD is this feature included? But I would still prefere to use a FM synthesizer for this job, since I only want some beep's. Having the kernel mix two streams into one looks to me as a waste of CPU-cycles on the Pentium-133 I set up for this job, if it is also possible to just turn on/off a simple tone and let the soundblaster take care of the mixing... -- Control the lights in my room: http://www.Danovitsch.dnsq.org/webcam Moo, ]:8) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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