From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: just an observation about USB Date: Mon, 19 Oct 2015 10:02:36 +0200 Message-ID: <1445241756.13733.6.camel@redhat.com> References: <561EAF76.1010105@eggo.org> <561EB530.6010605@redhat.com> <561EBB5E.1000602@eggo.org> <20151016115528.GB10205@stefanha-thinkpad.redhat.com> <56211C64.5020708@eggo.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Stefan Hajnoczi , Paolo Bonzini , kvm@vger.kernel.org To: "Eric S. Johansson" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:38333 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750997AbbJSICj (ORCPT ); Mon, 19 Oct 2015 04:02:39 -0400 In-Reply-To: <56211C64.5020708@eggo.org> Sender: kvm-owner@vger.kernel.org List-ID: On Fr, 2015-10-16 at 11:48 -0400, Eric S. Johansson wrote: > > On 10/16/2015 07:55 AM, Stefan Hajnoczi wrote: > > QEMU can emulate PCI soundcards, including the Intel HD Audio codec > > cards (-device intel-hda or -soundhw hda might do the trick). Low > > latency and power consumption are usually at odds with each other. > > That's because real-time audio requires small buffers many times per > > second, so lots of interrupts and power consumption. Anyway, PCI > > should be an improvement from USB audio. Stefan > > I set it up with ich9. I switched the default audio to my headset. I > hear the windows startup sound in the headset. Dragon reports that the > mic is not plugged in. I can see the audio level move in the sound > settings so I know the host is hearing the audio > > what should I look at next? Try '-device intel-hda -device hda-micro' (instead of -device intel-hda -device hda-duplex', or '-soundhw hda' which is a shortcut for the latter). 'hda-duplex' presents a codec with line-in and line-out to the guest. 'hda-micro' presents a codec with microphone and speaker to the guest. Other than having in and out tagged differently the codecs are identical. But especially declaring the input being a mic seems to be needed to make some picky windows software happy. cheers, Gerd