From owner-freebsd-multimedia@FreeBSD.ORG Wed May 23 18:32:57 2012 Return-Path: Delivered-To: multimedia@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4CF091065676 for ; Wed, 23 May 2012 18:32:57 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-bk0-f54.google.com (mail-bk0-f54.google.com [209.85.214.54]) by mx1.freebsd.org (Postfix) with ESMTP id C44718FC0A for ; Wed, 23 May 2012 18:32:56 +0000 (UTC) Received: by bkvi18 with SMTP id i18so8455146bkv.13 for ; Wed, 23 May 2012 11:32:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=ffzJ+Hen6hxIeFZksrFhSlRIaU3BHuJHyi8XgfFlqoM=; b=TgxomsYv1qARQkiHTwFuwqoxTNcl+ojmCPLICaT8SkdgNpvc+UyPQ/IHQdTH+6BuZ4 X4NFd83UVMDCUCoJvahFRD7NnHqQf+mraKPcSaH6oqAcsKhEaTFaE/ee+ZnXWx4Ajy4M rlFqNjYpcu+U2rchLX0QDGMYgQ2RG41bWrNGKdHtlFue17CRac87k9mw+YkbC6zJ/ggc Wx7ioBHUUYtmULUBsmfkGyfx2W7pmAMka/A68ZqSx29WzbmdPxT/3xKIdxQg9WQAf6eG oZTUteAYzTHQ8cihXPbRk3HK8mKcMbFi+HnY7c9G5NgtjQwKqwHZdtjxI45PoNH82n8h yBMA== Received: by 10.204.9.199 with SMTP id m7mr12034056bkm.66.1337797975701; Wed, 23 May 2012 11:32:55 -0700 (PDT) Received: from mavbook2.mavhome.dp.ua (pc.mavhome.dp.ua. [212.86.226.226]) by mx.google.com with ESMTPS id gm18sm38615998bkc.7.2012.05.23.11.32.51 (version=SSLv3 cipher=OTHER); Wed, 23 May 2012 11:32:54 -0700 (PDT) Sender: Alexander Motin Message-ID: <4FBD2D50.5080205@FreeBSD.org> Date: Wed, 23 May 2012 21:32:48 +0300 From: Alexander Motin User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:10.0.3) Gecko/20120328 Thunderbird/10.0.3 MIME-Version: 1.0 To: Konstantin Belousov References: <20120522220640.GB2358@deviant.kiev.zoral.com.ua> In-Reply-To: <20120522220640.GB2358@deviant.kiev.zoral.com.ua> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: multimedia@freebsd.org Subject: Re: NV10 hdac issue X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 May 2012 18:32:57 -0000 On 05/23/12 01:06, Konstantin Belousov wrote: > I have (another) Atom motherboard from Intel, DN2800MT. Now, the problem > is with distorted sound. Anything is played as if some pause is inserted > after the next sample is finished. So I hear the proper pitch, but with > guggle between fragments. I am not sure how to describe it better, except > to say that it sounds as if buffering was not enough, for regular short > intervals of approx. 0.5 sec. > > I do not believe that 1.8Hhz Atoms are too slow to decode mp3 or to play wav. > > The hda controller is > hdac0@pci0:0:27:0: class=0x040300 card=0x20128086 chip=0x27d88086 rev=0x02 hdr=0x00 > codec is Realtek ALC888. The verbose dmesg from hda_snd load is at > http://people.freebsd.org/~kib/tom.dmesg.txt , assuming this is useful. > > I would want to get normal sound from this board, thanks in advance. I haven't seen alike reports neither for this controller, nor for this CODEC. I would try to experiment with: 1) disabling MSI interrupts with hint.hdac.0.msi=0 2) switching to polling mode without using any interrupts with dev.hdac.0.polling=1 3) changing buffer size with hw.snd.latency 4) changing playback format (or vchans format it it is used) 5) setting sysctl hw.snd.verbose=2 and checking for application level underruns with `cat /dev/sndstat`. -- Alexander Motin