From owner-freebsd-multimedia@freebsd.org Mon Mar 29 08:24:32 2021 Return-Path: Delivered-To: freebsd-multimedia@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 66F0C5C0AAA for ; Mon, 29 Mar 2021 08:24:32 +0000 (UTC) (envelope-from timsofteng@gmail.com) Received: from mail-qt1-x82d.google.com (mail-qt1-x82d.google.com [IPv6:2607:f8b0:4864:20::82d]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4F85GR3GMYz4mSP for ; Mon, 29 Mar 2021 08:24:31 +0000 (UTC) (envelope-from timsofteng@gmail.com) Received: by mail-qt1-x82d.google.com with SMTP id j7so8752211qtx.5 for ; Mon, 29 Mar 2021 01:24:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=xrtwTrr91/ahw/VKHZRtv2G+bc7ZjW7LIEoLBRiC73o=; b=EC0hMOmJbYkGrBncGwD98QsJi1FaBGnGJB78t4Tz+Z0x+gwjTtbOv6+hUtketgUuYp /Fq2PPg9yrZrpAlypup6zMGj9FHbazHCI70tto2u/+UV6ymnkkvqzTMBq3+duV/uJsdj YcMXS9P1cz69i0vqMuNN+5v86cZwACjrEIoK6EiYN2mYwOAj1d/0PROGR+IHnV+JrJEO ABVQoPrrwm5jyyyWIuMIszElmDkWnIkEe4dXOy5nEy5/G0Ocvv7CMMG/H98PME/YIow2 3TyBP7E264irwTNuQSvsyiiTYehpI6XcB/1FvmTGtWTag6CqBj38qjpd2MTM/XcWvWyU QJNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=xrtwTrr91/ahw/VKHZRtv2G+bc7ZjW7LIEoLBRiC73o=; b=ai4lh+I07vOMZ/VwqDeUsKbHtrQ+UvUTh213c/a6gYtkMWQZ8OUO4Uq31/RbLaab7a BRCwMUKH2dKRjFObUlN9Ito/zsjIx7ZBjbA+a9LA8zxVsmFPeHj5B4oovOKlpSrUfLBu WW+4ljjS6oIsw7lPheQFJddWe/x3aAuif1VCJej+opBKWycZ+RAuiw8RCBZiO4nCPGP1 /30gUoNOv/P6SCKa8EkyO7nBO5GHECjNMd1U5UbfZt00kxT0HyZqJsh7iA0sTkcUkdwf 8Jumwcnqp2JJDlf3vKiqcFr3BdWp/B9eHXCSHNaKLZlZtp3gQj6T+BDBqDxe/t7SYtSc ntRQ== X-Gm-Message-State: AOAM530mo1ZGw0WgH8KJr7QYpgHBw2cW3QnpiN5C5sZFptocLBzMGoLN q9Le6TFIqo4CrgfB2AeQ9IFQxLJXn9ENDDI6TxI= X-Google-Smtp-Source: ABdhPJx47U1eT/zIHB4wmZgXrBCqn8KyB5eD/oAfAlee8omUOF/eVHxA/95y3mTyLi2zOpTP9tOEmBpsbyrd5eEsbTs= X-Received: by 2002:ac8:4412:: with SMTP id j18mr22133121qtn.387.1617006270531; Mon, 29 Mar 2021 01:24:30 -0700 (PDT) MIME-Version: 1.0 References: <4938264f-686a-af1a-cb28-f39585b1375a@selasky.org> In-Reply-To: <4938264f-686a-af1a-cb28-f39585b1375a@selasky.org> From: Softwafe Engineer Date: Mon, 29 Mar 2021 11:24:19 +0300 Message-ID: Subject: Re: Distorted sound with external usb-device and bitperfect To: Hans Petter Selasky Cc: freebsd-multimedia@freebsd.org X-Rspamd-Queue-Id: 4F85GR3GMYz4mSP X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=EC0hMOmJ; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of timsofteng@gmail.com designates 2607:f8b0:4864:20::82d as permitted sender) smtp.mailfrom=timsofteng@gmail.com X-Spamd-Result: default: False [-2.02 / 15.00]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; RBL_DBL_DONT_QUERY_IPS(0.00)[2607:f8b0:4864:20::82d:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; NEURAL_SPAM_SHORT(0.98)[0.984]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-multimedia@freebsd.org]; SPAMHAUS_ZRD(0.00)[2607:f8b0:4864:20::82d:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::82d:from]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-multimedia] X-Mailman-Approved-At: Mon, 29 Mar 2021 11:25:08 +0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.34 X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Mar 2021 08:24:32 -0000 Thanks a lot. But what application should do if file is in 16 bit? Should all files be converted to 32 bit? I supposed bitperfect sends pure stream without any converter. =D0=BF=D0=BD, 29 =D0=BC=D0=B0=D1=80. 2021 =D0=B3., 11:12 Hans Petter Selask= y : > On 3/29/21 6:59 AM, Softwafe Engineer wrote: > > Here is dmesg after motu m2 was plugged: > > > > https://pastebin.com/1mcQNn1H > > > > (is pastebin ok?) > > > > I've tried it in few music players which are could be find in ports > > - deadbeef > > - audacious > > > > Both sound distorted when I enable bitperfect and disable vchans. If > > not then sounds ok. > > > > I never try virtual_oss. I just would to send bitperfect sound from > > freebsd to motu m2 to listen music. > > > > Hi, > > I suspect the applications you are trying to use don't support 32-bit > mode via OSS. That's why you hear noise. They've configured something > else, like 16-bit or 24-bit mode. > > You could ktrace the application possibly to figure this out. It will > show all IOCTL's. > > Try to configure virtual_oss in bitperfect mode instead for a test. > > Beware that many applications that output 16-bit audio, don't properly > fill the lower bytes with noise when they resampling to 32-bit. That's > another reason to use virtual_oss :-) > > --HPS >