From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: is 440 Hz the true harmonic wave Date: Mon, 31 Mar 2014 09:45:18 +0200 Message-ID: <53391D0E.2000306@ladisch.de> References: <1396244213.3927.4.camel@debian> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from dehamd003.servertools24.de (dehamd003.servertools24.de [31.47.254.18]) by alsa0.perex.cz (Postfix) with ESMTP id 691DD26510F for ; Mon, 31 Mar 2014 09:45:19 +0200 (CEST) In-Reply-To: <1396244213.3927.4.camel@debian> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: =?ISO-8859-1?Q?Jo=EBl_Kr=E4hemann?= , alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Jo=EBl Kr=E4hemann wrote: > Is 440 Hz the true harmonic wave? 440 Hz is a frequency, not a wave. A single sine wave does not have overtones, so it is not possible to apply the term "harmony". I do not understand what you mean with "true". > Is there a constant for it in glibc, like M_PI? What would be the use of a definition like "#define HZ_440 440"? Regards, Clemens