From owner-freebsd-multimedia Thu Feb 21 11:47: 0 2002 Delivered-To: freebsd-multimedia@freebsd.org Received: from anchor-post-30.mail.demon.net (anchor-post-30.mail.demon.net [194.217.242.88]) by hub.freebsd.org (Postfix) with ESMTP id F26CA37B400 for ; Thu, 21 Feb 2002 11:46:56 -0800 (PST) Received: from vilnya.demon.co.uk ([158.152.19.238]) by anchor-post-30.mail.demon.net with esmtp (Exim 3.34 #1) id 16dzB8-0007fI-0U; Thu, 21 Feb 2002 19:46:55 +0000 Received: from haveblue (haveblue.rings [10.2.4.64]) by vilnya.demon.co.uk (Postfix) with SMTP id E16F72E84C; Thu, 21 Feb 2002 19:46:50 +0000 (GMT) Message-ID: <028101c1bb10$72ebee60$4004020a@haveblue> From: "cameron grant" To: "Martin Faxr" , Cc: References: <02022118511701.03193@FreeBSD.Danovitsch.LAN> <20020221190157.7be685b2.gmh003532@brfmasthugget.se> Subject: Re: No FM synthesizer in PCI soundblasters? Date: Thu, 21 Feb 2002 19:46:26 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-freebsd-multimedia@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org > I'm not quite sure... It should definitely be in 4.5-RELEASE, and I think > 4.4-RELEASE too. You could try searching the CVS logs or asking Cameron Grant. use 4.5. > > 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... > > Actually, I think that FM synthesizer support in -STABLE isn't really mature, > if it even exists at all (although I'm not 100% sure, perhaps you'd be better > off asking Cameron Grant here too). there is no fm synth support in -stable. not that that matters, since none of the pci soundblasters contain an fm synth. they do have a secondary playback channel which is intended to be used for cpu-generated fm which could be used as a general second playback channel but we don't use it for some reason. if anyone wants to extend the driver, i can provide hardware docs. > I don't think the vchan mixing will waste too many CPU cycles, if the upgrade > isn't a problem. i haven't tested on a p133- my slowest testbox is a dual p2/300- but i'd be very surprised if the overhead was more than 2% cpu time for 4 channels. if you were to extend the driver as above, there would be no overhead. -cg To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message