Update to correct (minor) misstatememt pointed out on netbsd-users
by Ramiro Aceves.

(Someone with better knowledge of the audio system than I should
review this and correct anything I do not correctly understand.)

branches: 1.25.4;
fix various typos in comments, documentation and messages.
mainly s/paramater/parameter/ and s/reduntant/redundant/.

audioctl.1: describe foibles

branches: 1.23.2;
Sort options (no-argument options before ones demanding arguments).

Bump date.

Remove -p option. AUDIO_SETCHAN is insecure and is obsoleted.

branches: 1.21.12;
Audio now uses fdclone, there is no longer a limitation of one audio
instance per process. Virtual channels are placed in a queue, so there is
no longer a compile time limit of VAUDIOCHANS.

A new sysctl has been added to control multiple user access.
Mixer labels on virtual channels are now prefixed by vchan.

audiobell.c and audioctl have been updated to reflect these changes.

Use of fdclone was posted to tech-kern@ and improvements made.
Multiuser access control changes and the use of a queue were suggessted by
pgoyette@

branches: 1.20.2;
The audio sub-system now supports the following features as
posted to tech-kern:

* Simultaneous playback and mixing of multiple streams
* Playback streams can be of different encoding, frequency, precision
and number of channels
* Simultaneous recording to different formats
* One audio device per process
* Sysctls to set the common format frequency, precision and channels
* Independent mixer controls for recording/playback per stream
* Utilizes little cpu time for multiple streams / good performance
* Compatible with existing programs that use OSS/NetBSD audio
* Changes to audioctl(1) to allow specifying process id for corresponding
audio device

branches: 1.19.28;
Reorder sections to canonical order.

Convert TNF licenses to new 2 clause variant

branches: 1.17.32;
.Nm does not need a dummy argument ("") before punctuation or
for correct formatting of the SYNOPSIS any longer.

New sentence, new line. Use Aq/An.

Use '-d' rather than '-f' for specification of alternative
mixer or audioctl device. The support for '-f' is kept for compatibility
for now.

Sort sections, drop some whitespace.

Xref audioplay(1) and audiorecord(1).

branches: 1.12.2;
Add missing .El line.

Oops; update the date as well.

Update comments.

Rework the examples section a little.

Use audio and mixer devices with unit numbers. Also allow the devices
without unit numbers of a compatibility option is set. Fixes PR 5991.

Chnage the name of the environment variables just introduced.

Add an environment variable for the default audio device.

fix .Nm usage

Fix tipo inherited from old version of TNF copyright template.

Change to use /dev/audioctl.

Add HISTORY section.

Add audio utility programs.
The audio device can be inspected and changed by audioctl,
and the mixer device by mixerctl. The command syntax was
inspired by sysctl.