From mboxrd@z Thu Jan  1 00:00:00 1970
MIME-Version: 1.0
Date: Sat, 15 Jan 2011 11:04:54 +0100
Message-ID: <AANLkTinu5x=4XCeg_TLSk19qrNkEL2ZpvZa8u3C_O60p@mail.gmail.com>
From: Rudolf Sykora <rudolf.sykora@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Content-Type: text/plain; charset=ISO-8859-1
Subject: [9fans] sound, graphics, tuner
Topicbox-Message-UUID: 99542324-ead6-11e9-9d60-3106f5b1d025

Hello,

Recently I came across a need to tune a musical instrument.

I tried to think how difficult it'd be to write a program which would
1) read the signal from a microphone, 2) process it, 3) show the tone
played and its deviation, possibly graphically. (In linux, lingot is
the example.)

I have a good notion about the middle task (2). So far I've never
tried to read anything from a soundcard, nor to create any graphics in
plan9. First, I am aware that in linux the soundsystem is controlled
by something called ALSA or OSS. It's always seemed to me a
complicated thing (I may be well wrong). Second, in linux there are
many graphical libraries like GTK, Qt, wxWidgets, Tk, others. Is there
anything in plan9 that could be simple to grasp and create an analog
gauge with it?

Can anybody comment this and/or possibly point me at some good documents?

Thanks
Ruda