mirror of
https://github.com/reactos/reactos.git
synced 2024-12-18 16:43:27 +08:00
52 lines
2.1 KiB
Plaintext
52 lines
2.1 KiB
Plaintext
BEEPMIDI :: BEEP.SYS MIDI DRIVER
|
|
(c) Andrew Greenwood, 2007.
|
|
|
|
http://www.silverblade.co.uk
|
|
|
|
Released as open-source software. You may copy, re-distribute and modify
|
|
this software, provided this copyright notice remains intact.
|
|
|
|
WHAT'S THIS ?
|
|
BeepMidi is a MME MIDI driver for NT-compatible operating systems,
|
|
which uses BEEP.SYS (the kernel-mode PC speaker driver) to play
|
|
MIDI data. It installs as a standard MIDI output device and can even
|
|
be selected as your default MIDI output device. The fundamental
|
|
code for interacting with BEEP.SYS was taken from ReactOS' kernel32
|
|
module.
|
|
|
|
WHY WAS THIS WRITTEN ?
|
|
Primarily for educational reasons - in the process, I've learned more
|
|
about the driver side of the MME API and how to interact with kernel
|
|
device drivers. It aids as a good starting point from which to
|
|
move on to bigger and better things :)
|
|
|
|
HOW TO INSTALL :
|
|
Copy the file to C:\WINDOWS\SYSTEM32\BEEPMIDI.DLL
|
|
|
|
Go into HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
|
|
Drivers32 in RegEdit and look for the "midi" entries on the right hand
|
|
side. Find the highest numbered one (eg: midi1) and create a new STRING
|
|
value. Give it another midi name, but one above the current highest
|
|
entry present (eg: midi2.)
|
|
|
|
You'll now see a "PC Speaker" entry in Sound & Audio Devices.
|
|
|
|
TWEAKING:
|
|
See the comments toward the top of beepmidi.c for tweakable driver
|
|
parameters. These can only be adjusted in the source code at present.
|
|
|
|
FEATURES :
|
|
* Supports note-on and note-off messages on channels 1-9 and 11-16
|
|
(channel 10 is rhythm, which is not supported.)
|
|
* Fake polyphony (actually just arpeggiates playing notes!)
|
|
* Threaded design for continuous playback (optional.)
|
|
|
|
ROOM FOR IMPROVEMENT :
|
|
* Pitch bend is not supported
|
|
* Velocity could determine timeslice
|
|
* Should wait for timeslice to complete before adding/removing notes
|
|
* Would be nice to allow configuration of polyphony etc. via Control Panel
|
|
|
|
BUGS :
|
|
* Crashes when used with Windows Media Player (mplayer2 is fine though)
|