Return-Path: Received: from rly-ma10.mx.aol.com (rly-ma10.mail.aol.com [172.20.116.54]) by air-ma01.mail.aol.com (v121.4) with ESMTP id MAILINMA014-8cf47ae2378e0; Sat, 09 Feb 2008 17:04:47 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma10.mx.aol.com (v121.4) with ESMTP id MAILRELAYINMA101-8cf47ae2378e0; Sat, 09 Feb 2008 17:04:42 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1JNxnw-0006bq-7R for rs_out_1@blacksheep.org; Sat, 09 Feb 2008 22:04:12 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1JNxnv-0006bh-KW for rsgb_lf_group@blacksheep.org; Sat, 09 Feb 2008 22:04:11 +0000 Received: from pne-smtpout2-sn2.hy.skanova.net ([81.228.8.164]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1JNxns-0007rd-OZ for rsgb_lf_group@blacksheep.org; Sat, 09 Feb 2008 22:04:11 +0000 Received: from [127.0.0.1] (81.232.131.201) by pne-smtpout2-sn2.hy.skanova.net (7.3.129) (authenticated as u33233109) id 47A02DB900377AEA for rsgb_lf_group@blacksheep.org; Sat, 9 Feb 2008 23:04:01 +0100 Message-ID: <47AE2351.8010202@telia.com> Date: Sat, 09 Feb 2008 23:04:01 +0100 From: "Johan H. Bodin" User-Agent: Thunderbird 2.0.0.9 (Windows/20071031) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <001501c8690d$0e706f40$410d7ad5@w4o8m9> <001501c869db$a296b840$97188351@w4o8m9> <000d01c86aa8$96510040$ae197ad5@w4o8m9> <47ADFB8F.5050001@telia.com> <47AE1D7E.808@usa.net> In-Reply-To: <47AE1D7E.808@usa.net> X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: M0BMU WOLF Beacon Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : n X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : n X-Mailer: Unknown (No Version) Alberto, > A good suggestion for Nico would be to implement the resampler > inside the Perseus software... Yes. I'd suggest that you put that suggestion on the Perseus list to remind Nico that this question should have higher priority than the colour of buttons :-). I mentioned this VAC stuff to Nico (together with spectrum screen dumps) but he did not reply. Maybe a a CPU friendly fractional resampler is not easy to make :-) 73 Johan SM6LKM Alberto di Bene wrote: > Johan H. Bodin wrote: > >> This sampling rate is re-sampled to a "standard" rate by >> Windows when listening through the soundcard, and by the VAC software >> (Virtual Audio Cable) when routing the signal to other programs such as >> Wolf. Unfortunately, the VAC software seems to use a quite sloppy >> algorithm for resampling, probably to reduce the CPU load. At some >> output sampling rates, there are distorsion products that look like some >> kind of "in-band aliasing" and these are not more than 40dB down or so >> :-( Maybe this percent of THD goes unnoticed by "normal" VAC users who >> listen to mainsream music (which is usually 100% distorsion anyway ;-) ) > > Yes, I can confirm that VAC has a very bad resampler. You can hear the > artifacts easily, even on voice recordings. A good suggestion for Nico > would be to implement the resampler inside the Perseus software... > > 73 Alberto I2PHD > > >