From: "Joël Krähemann" <joel@weedlight.ch>
To: Felix Homann <linuxaudio@showlabor.de>
Cc: alsa-devel <alsa-devel@alsa-project.org>,
Clemens Ladisch <clemens@ladisch.de>
Subject: Re: is 440 Hz the true harmonic wave
Date: Mon, 31 Mar 2014 11:57:41 +0200 [thread overview]
Message-ID: <1396259861.3923.24.camel@debian> (raw)
In-Reply-To: <1396259368.3923.22.camel@debian>
On Mon, 2014-03-31 at 11:49 +0200, Joël Krähemann wrote:
> On Mon, 2014-03-31 at 11:30 +0200, Joël Krähemann wrote:
> > On Mon, 2014-03-31 at 10:27 +0200, Felix Homann wrote:
> > > 2014-03-31 10:20 GMT+02:00 Joël Krähemann <joel@weedlight.ch>:
> > >
> > >
> > > I believe that 440 Hz is an approximation rather than true
> > > harmonic on
> > > it's pressure. Or am I wrong? Sine is harmonic in default arc.
> > >
> > >
> > >
> > > What are you talking about???
> >
> > About scale. Am I wrong when I believe 440 Hz has physical property to
> > be harmonic?
> >
> >
> >
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel@alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
> Note: 1/45 is 90 degree.
>
> (250000000 * (1 / 45)) calculated with calculator on GNU/Linux equals:
> 5555555.555555556
>
> This, some handy threading functions and nanosleep makes my application
> run with a thread tree.
>
> sf.net/p/ags
>
> As I'm reflecting I recognize that there are 10^3 more zero's as I
> wanted. I give it a try with: 250000
>
> That would result about 4𝜇s
>
> That could you have seen if you didn't ban me from
> linux-kernel@vger.kernel.org:
>
> GNU/Linux is great!
>
> This changed my life:
>
> /* and now async */
> {
> static const struct timespec req = {
> 0,
> (250000000 * 1 / 45),
> };
>
> if(!AGS_IS_DEVOUT_THREAD(thread)){
> nanosleep(&req, NULL);
> }
> }
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
It runs into a deadlock! It could practically intefer with any software.
But back to topic: I'm doing softsynth.
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prev parent reply other threads:[~2014-03-31 9:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-31 5:36 is 440 Hz the true harmonic wave Joël Krähemann
2014-03-31 7:45 ` Clemens Ladisch
2014-03-31 8:20 ` Joël Krähemann
[not found] ` <CAFz=ag7Xgvjq6JL7i=KMjCoh==3EDw2Y-NSoeBm3hnjKt2ZDrw@mail.gmail.com>
2014-03-31 9:30 ` Joël Krähemann
2014-03-31 9:49 ` Joël Krähemann
2014-03-31 9:57 ` Joël Krähemann [this message]
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