================================================================ AWE64 midi synth driver v0.5.0 ================================================================ 0. PREFACE ---------- This directory contains Emu8000 lowlevel driver. This driver was originally developed by Steve Ratcliffe <steve@parabola.demon.co.uk>. After releasing the OSS sequencer emulation module, another version was developed based on his early version by Takashi Iwai <iwai@ww.uni-erlangen.de>. These different versions are merged, and hereby released as ver.0.5.0. 1. DRIVER DESIGN ---------------- In the current version, the driver contains three indepent parts: - Emu8000 lowlevel synth engine - Soundfont manager - MIDI emulation The latter two parts don't contain any hardward specific codes. Other drivers can use these routines. The MIDI emulation will be independent module in the future release. The Emu8000 code contains the routines communicating with OSS sequencer emulator. If the driver is compiled with OSS emulation option, the soundfont file can be loaded via OSS sequencer device using the normal sfxload program. The sfxload program can be found at: http://bahamut.mm.t.u-tokyo.ac.jp/~iwai/awedrv Otherwise, you'll need to applay a patch to sfxload program. The patch can be found at: http://dialspace.dial.pipex.com/town/park/adf89/alsa/awe64.shtml The sample loading routines will be replaced to the ALSA standard instrument layer routines in the future release. The current version was tested on both 2.2.9 and 2.0.36 systems. Please note that compiling with egcs may cause a fatal bug (see BUGS). 3. MODULE OPTIONS ----------------- The following module options are available for snd-emu8000.o: - seqports Number of sequencer ports to be created as MIDI ports. Default value is 4. The ports for OSS synth devices are not included in this number. They are created dynamically. - emu8000_reset_addr Specify that the DRAM addresss is reset at each time if non-zero value is given. This makes sample loading time slow down (about twice) but ensures the correct data loading (see BUGS). Default value is 1. 4. CONTROLS ----------- There are a few things that can be controlled temporarily via the patch interface. dd if=/dev/asound/0/patch0 count=1 bs=2 Using a different block size will trigger a particular command. bs=2 Connect MIDI-in to the synth. After this command it will be possible to play from a connected keyboard etc. bs=3 Disconnects from MIDI-in. bs=4 All notes off. This is now done automatically when the sequencer disconnects, so this is not really needed any more. The triggering a test note using "dd bs=1" is removed. You might want to remove these features if you have no MIDI keyboard. In such a case, undefine HACK_MIDI_IN in emu8000_proc.c. 5. BUGS ------- - Compiling with egcs-1.1.1 (or 1.1.2-pre3) may cause kernel Oops together with OSS sequencer emulator. GCC-2.7.2.x has no problem. (Using egcs-1.1.2 seems fine -- iwai) - The sample loading to RAM is much slower than it should be. This is because of reliability to write the samples to RAM in the former versions. Some samples seem to have a large number of missing sample points. It is as if sometimes the write address pointer does not increment properly. Thus, the address are reset at each time before writing the actual data. This behavior can be disabled by module option "emu8000_reset_addr=0". In the current version, most of sample downloading works fine without resetting address. But this operation is remained for insurance as default. - You may get snd: seq: snd_seq_pool_done() - pool isn't free!! messages when a client disconnects from the synth (although I've never seen this -- Iwai) This is believed to be harmless, or at least mostly harmless. 6. MAINTAINERS -------------- - Emu8000 synth engine (emu8000_*.[ch]) Takashi Iwai <iwai@ww.uni-erlangen.de> - MIDI emulation (midi_emulate.c) Steve Ratcliffe <steve@parabola.demon.co.uk> -- Takashi Iwai <iwai@ww.uni-erlangen.de>Download Driver Pack
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