From mboxrd@z Thu Jan 1 00:00:00 1970 From: Felix Homann Subject: Re: M-Audio FTU issues Date: Fri, 24 Jun 2011 10:52:40 +0200 Message-ID: <4E045058.6000405@showlabor.de> References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------060103060706090602030808" Return-path: Received: from vwp5738.webpack.hosteurope.de (vwp5738.webpack.hosteurope.de [83.169.30.203]) by alsa0.perex.cz (Postfix) with ESMTP id D62191039EF for ; Fri, 24 Jun 2011 10:52:43 +0200 (CEST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Daniel Mack Cc: =?ISO-8859-1?Q?Aur=E9lien_Leblond?= , alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org This is a multi-part message in MIME format. --------------060103060706090602030808 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi again, Am 24.06.2011 03:14, schrieb Daniel Mack: > > Hence my question is: How do you guys test? I renderened a sine tone > in different samplerates and bit depths to .wav files and play them > with aplay (no pulseaudio or anything in the chain). Could you try the > same and report what happens? > OK, I've rendered a sine to a .wav (well, in audacity), played it via aplay on the FTU8R and could hear the clicks. I've been using plughw though, cause I don't remember right now how to convert bit-depths. I even played sines directly from puredata and audacity without JACK and could still hear the clicks. Please, make sure you have the routing "diagonal", i.e. "DIn i - Out j" is set to 0% if i !=j and 100% if i == j. I've attached a small bash script to accomplish this. After plugging the device in all playback volumes are initially at 100%. I could not notice the clicks then unless it turned the volume very very loud (I guess aplay plays back on all channels, which blurs the clicks). If you still can't hear the clicks please try using a headphone? Sometimes the clicks are hardly noticable when there's minimal background noise. You might even have turn the volume higher than convenient for your ears... I hope this helps hearing the clicks using the unmodified driver. Kind regards, Felix --------------060103060706090602030808 Content-Type: application/x-shellscript; name="ftu-diagonal-routing.sh" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="ftu-diagonal-routing.sh" IyEvYmluL2Jhc2gKCmZvciBpIGluIGBzZXEgMSA4YDsgZG8KICAgICAgICBmb3IgaiBpbiBg c2VxIDEgOGA7IGRvCiAgICAgICAgICAgICAgICBpZiBbICIkaSIgIT0gIiRqIiBdOyB0aGVu CiAgICAgICAgICAgICAgICAgICAgICAgIGFtaXhlciAtYzEgc2V0ICJESW4kaSAtIE91dCRq IiAwJSA+IC9kZXYvbnVsbAogICAgICAgICAgICAgICAgZWxzZQogICAgICAgICAgICAgICAg ICAgICAgICBhbWl4ZXIgLWMxIHNldCAiREluJGkgLSBPdXQkaiIgMTAwJSA+IC9kZXYvbnVs bAogICAgICAgICAgICAgICAgZmkKICAgICAgICAgICAgICAgIGFtaXhlciAtYzEgc2V0ICJB SW4kaSAtIE91dCRqIiAwJSA+IC9kZXYvbnVsbAogICAgICAgIGRvbmUKZG9uZQo= --------------060103060706090602030808 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline --------------060103060706090602030808--