From owner-freebsd-current@freebsd.org  Tue Sep 15 06:23:50 2020
Return-Path: <owner-freebsd-current@freebsd.org>
Delivered-To: freebsd-current@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id BF20D3F2161;
 Tue, 15 Sep 2020 06:23:50 +0000 (UTC) (envelope-from hps@selasky.org)
Received: from mail.turbocat.net (turbocat.net [88.99.82.50])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256)
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 4BrCq96xWtz4v3W;
 Tue, 15 Sep 2020 06:23:49 +0000 (UTC) (envelope-from hps@selasky.org)
Received: from hps2020.home.selasky.org (unknown [178.17.145.105])
 (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)
 key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256)
 (No client certificate requested)
 by mail.turbocat.net (Postfix) with ESMTPSA id 6688226044C;
 Tue, 15 Sep 2020 08:23:47 +0200 (CEST)
Subject: Re: USB sound devices with FreeBSD-CURRENT
From: Hans Petter Selasky <hps@selasky.org>
To: Graham Perrin <grahamperrin@gmail.com>,
 FreeBSD CURRENT <freebsd-current@freebsd.org>,
 FreeBSD questions <freebsd-questions@freebsd.org>
References: <9551111b-5dfb-c42b-6f58-81f6c8b8bbd1@gmail.com>
 <b35f3d8a-6d47-67fa-864b-488cf63b9b9a@selasky.org>
 <7731b641-687c-03e1-60b6-11f21595f13c@gmail.com>
 <56165f3e-515e-e048-a1e5-6f2f059f39c3@selasky.org>
Message-ID: <c38f7bb2-246d-fc92-c5dd-56f104de7384@selasky.org>
Date: Tue, 15 Sep 2020 08:23:17 +0200
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101
 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <56165f3e-515e-e048-a1e5-6f2f059f39c3@selasky.org>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
X-Rspamd-Queue-Id: 4BrCq96xWtz4v3W
X-Spamd-Bar: -
X-Spamd-Result: default: False [-1.93 / 15.00]; RCVD_TLS_ALL(0.00)[];
 RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[];
 FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3];
 R_SPF_ALLOW(-0.20)[+a:mail.turbocat.net];
 NEURAL_HAM_LONG(-1.04)[-1.040]; MIME_GOOD(-0.10)[text/plain];
 DMARC_NA(0.00)[selasky.org]; ARC_NA(0.00)[];
 NEURAL_SPAM_SHORT(0.27)[0.272]; TO_MATCH_ENVRCPT_SOME(0.00)[];
 TO_DN_ALL(0.00)[]; NEURAL_HAM_MEDIUM(-0.87)[-0.865];
 FREEMAIL_TO(0.00)[gmail.com,freebsd.org];
 FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[];
 MIME_TRACE(0.00)[0:+];
 ASN(0.00)[asn:24940, ipnet:88.99.0.0/16, country:DE];
 RCVD_COUNT_TWO(0.00)[2];
 MAILMAN_DEST(0.00)[freebsd-current,freebsd-questions]
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.33
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 15 Sep 2020 06:23:50 -0000

On 2020-09-13 16:30, Hans Petter Selasky wrote:
> On 2020-09-13 16:13, Graham Perrin wrote:
>> pcm3: <USB audio> (rec)
>> pcm4: <USB audio> (play/rec)
> 
> Or:
> 
> -R /dev/dsp4 -P /dev/dsp4
> 
> -f /dev/dsp4
> 
> You can also add these parameters run-time via the GUI for virtual_oss.
> 

As a follow up to this discussion I've lowered the default buffer 
latency to 8ms, which is the default for all USB devices.

https://svnweb.freebsd.org/changeset/ports/548703

--HPS