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UADE(1) UADE(1) NAME UADE - Unix Amiga Delitracker Emulator SYNOPSIS uade123 [options] files ... DESCRIPTION uade123 plays old amiga music formats by emulating Amiga hardware. It re-uses Amiga Eagleplayer plugins to play different formats. Eagle- player plugins require an implementation of the Eagleplayer API and AmigaOS APIs to run on. Therefore Eagleplayer API and parts of AmigaOS have been implemented in uade. uade123 is a command line player that can be used to play Amiga songs. It's options and behavior are documented here. There is also a plugin for the audacious. Section FILE FORMAT DETECTION explains hardships of recognizing amiga formats and consequently problems it may cause for the user (and au- thors). Section COMMAND LINE OPTIONS documents command line options for uade123. Section ACTION KEYS documents action keys which are used to issue run- time commands to control playback. These commands include switching subsong, skipping to next song, skipping fast forward, pausing and al- tering post-processing effects. Section CONFIGURATION FILES documents variables which can be changed in eagleplayer.conf, song.conf and uade.conf to alter default behavior of uade123 and other frontends. eagleplayer.conf is used for eagleplayer plugin specific configurations. song.conf is used for song specific configurations which can be used to change sound effects or avoid prob- lems. uade.conf is the main configuration file that can be used to set defaults for variables. Command line options will always override uade.conf options. FILE FORMAT DETECTION Creating file detection heuristics for 200 formats is difficult and most of those formats are undocumented or otherwise not easily recog- nizable. Therefore we have to detect some formats by file name prefixes and postfixes which can easily cause problems. For example, many dif- ferent protracker variants are named with 'mod' prefix and the format lacks version number inside the data file making it rather hard to rec- ognize proper mod variant. Sound output can be buggy with some unrec- ognizable mod variants. When file format can not be deduced based on file contents, a heuristics based on the file name must be used. This may sound strange, but many of the m68k machine language player plugins are black boxes which have no reliable mechanism to validate whether a given file belongs to them or not. The filename based heuristics may cause unrecognized songs in uade123. In audacious plugin they can cause conflicts with other plugins. COMMAND LINE OPTIONS -1, --one Play at most one subsong per file. -@ filename, --list=filename Play song files listed in the file. --ao-option=x:y Set option for libao, where 'x' is an audio driver specific op- tion and 'y' is a value. Note 'x' may not contain ':' character, but 'y' may. This option can be used multiple times to specify multiple options. Example for alsa09 plugin: --ao-option=dev:default --buffer-time=x Set audio buffer length to x milliseconds. It can be used to avoid audio underruns on some systems. The default value of this setting is provided by the libao. Notice that libao support for ALSA has a bug in versions 0.8.6 and earlier that buffer_time must actually be given in microseconds rather than milliseconds. -d, --debug Turn debug mode on. Experts only. --detect-format-by-content Set file magic mode. The songs are only detected by file con- tents. File name based heuristics (prefixes and postfixes) are not used. --disable-timeouts Disable timeouts. The frontend will never timeout a song. --enable-timeouts Enable timeouts. The frontend will normally timeout a song. -e format Set output file format (au, raw, wav). Use with -f. -f filename Output sound data to filename. --filter Enable filter emulation. It is enabled by default but could be disabled from uade.conf. --filter=x Set filter emulation mode to x. x is a500, a1200 or none. A500 is the default. 'none' means disabling the filter. Please note that A500 and A1200 are audibly different on every song even if a song doesn't use filtering. Surprisingly, the biggest differ- ence between A500 and A1200 is filter behavior when LED is off (i.e. song doesn't use filtering). When LED is off, A1200 does very little filtering but A500 does some filtering that can be easily heard. Please try switching between A500 and A1200 modes. You should get same results with real Amigas too :-) --force-led=x Force Amiga filter on or off. 0 means "OFF" and 1 means "ON". --frequency=x Set output frequency to x Hz. The default is 44,1 kHz. Note that this option applies to all frontends (including Audacious plu- gin). -G, --gain=x Set volume gain to x. x must be a non-negative value. The de- fault value is 1,0. -g, --get-info Print playername and subsong information to stdout and then exit. This is useful for recording script. --headphones Enable headphones postprocessing effect. --headphones2 Enable headphones 2 postprocessing effect. -h, --help Print command line help. -i, --ignore Force eagleplayer to play the song. -j x, --jump=x Jump to song position of x seconds. -k x, --keys=x Turn action keys on (x = 1) or off (x = 0). -n, --no-ep-end-detect Play music ad infinitum by ignoring song end reported by the ea- gleplayer. Note that this does not affect timeouts. --ntsc Set NTSC mode. This can be buggy. --pal Set PAL mode. This is the default. -p x, --panning=x Set panning effect to x. This means mixing left and right chan- nel affinely together. n is a value between 0 and 2. 0 is full stereo, 1 is mono and 2 is inverse stereo. -P playerfile Set filename of the eagleplayer. -r, --recursive Play directories recursively. --repeat Play playlist over and over again. --resampler=s Set resampling method to s. It can be default, sinc or none. See RESAMPLERS section for more information. -s n, --subsong=n Choose subsong n. -S scorefile Set filename of sound core. Experts only. Useful for debugging sound core related problems. Picking score file from earlier re- leases may help revealing the problem source. --scope Turn on audio register debug mode. Prints Paula hardware regis- ter hits on the command line. Support for this option has to be enabled from the configure script (--with-text-scope). --set="option1 option2 ..." Set song.conf options for given songs. uade123 will not play anything if --set is used. --set makes uade123 remember song specific options for future playback. For example, this option is useful for working around bugs in ripped songs (and even uade ;-). Example: Set volume gain to 2 for mod.foo: uade123 --set="gain=2" mod.foo. Another example: Force mod.uptim8 to be played as a Startrekker 4 song: uade123 --set="player=PTK-Prowiz epopt=type:flt4" mod.uptim8 mod.level6h in the "Disposable Hero" requires vblank timing for the protracker replayer: uade123 --set='epopt=vblank' mod.level6h --speed-hack Enable speedhack. Emulate all instructions to be executed in one m68k cycle. Some players, such as EMS v6, take too many m68k cy- cles to be real-time. This option gives them enough m68k cycles. Notice that you do _not_ need to use this switch with EMS v6 or Octamed, because it is automatically enabled for those formats. A replayer usually knows to ask for speedhack. --stderr Print all messages on stderr. This is useful if one uses -f /dev/stdout as a trick to pipe sample data on the command line. -t x, --timeout=x Set song time out to x seconds. Default is infinite (-1). -w x, --subsong-timeout=x Set subsong timeout to x seconds. -1 means infinite. Default is 512 seconds. -v, --verbose Turn verbose mode on. This is useful for debugging strange situ- ations. -x, --ep-option=y Use eagleplayer option y. For example, to force a module to be played as a Protracker 1.1b module, execute: uade123 -x type:pt11b mod.foobar -y x, --silence-timeout=x. Set silence timeout to x seconds. If x seconds of silence is de- tected the (sub)song ends. -z, --shuffle Randomize playlist order before playing. --write-audio filename Write a paula events and register writes to a given filename. This can be used to generate an oscilloscope view video. See write_audio/README.md for more info. ACTION KEYS uade123 can be controlled interactively on the command line by pressing specific action keys. [0-9] Change subsong. '<' Previous song. '.' Skip 10 seconds forward. SPACE, 'b' Next subsong. 'c' Pause. 'f' Toggle filter (takes filter control away from eagle- player). 'g' Toggle gain effect. 'h' Print keyboard commands (this list) 'H' Toggle headphones effect. RETURN, 'n' Next song. 'p' Toggle postprocessing effects. 'P' Toggle panning effect. Default value is 0,7. 'q' Quit. 's' Toggle between shuffle mode and normal play. 'v' Toggle verbose mode. 'x' Restart current subsong. 'z' Previous subsong. CONFIGURATION FILES All configuration files are in a line based format. This means that line breaks (\n) must be used properly. Lines beginning with # are com- ment lines. Empty lines are ignored. eagleplayer.conf Each line in eagleplayer.conf sets eagleplayer specific options. It is used, among other things, to specify file name extensions to different formats. It has the format: playername prefixes=prefix1,prefix2,... [opt1 opt2 ...] [comment] playername refers to an existing eagleplayer in players/ directory. prefixes is a list of file prefixes and postfixes that are associated with this eagleplayer. opt1, opt2 and so forth are options that can be given to the player. Valid options for eagleplayer.conf are listed in the song.conf section. Some example lines for eagleplayer.conf: custom prefixes=cust fred prefixes=fred broken_song_end PTK-Prowiz prefixes=mod,pha,pp10 always_ends EMSv6 prefixes=emsv6 speed_hack foobar comment: this format is not detected by a filename prefix but file content as it should be song.conf song.conf is a configuration file for applying work-arounds for songs that have problems with eagleplayers. Protracker is especially notori- ous for having many incompatible versions, and modules do not have ver- sion information about the editor which was used to create them. One can program song.conf rules for songs by using the --set option in uade123. For example, forcing a module into vblank timing, do: "uade123 --set='epopt=vblank' mod.level6h" The file shall have lines of following format: md5=XXX option1 [option2 ...] [comment: YYY] Valid options for eagleplayer.conf and song.conf: a500 Use A500 filter emulation a1200 Use A1200 filter emulation always_ends A song will always end. This means that song end detection code is perfect so timeouts in uade.conf can be ignored. However, timeouts given from command line will override this setting. broken_song_end Song end reported by the eagleplayer is ignored detect_format_by_content A song can only be detected by contents, never by filename prefix or postfix epopt=x Append option x for eagleplayer. Valid options are listed in section "EAGLEPLAYER OPTIONS". gain=x Set gain value to x ignore_player_check Eagleplayer tries to play the song even if it is not recognized as being in proper format. One can use this option with bad eagleplayers in eagleplayer.conf and bad rips in song.conf. led_off Force LED off led_on Force LED on no_ep_end_detect Song end reported by the eagleplayer is ignored no_filter No filtering (avoid this option, using a1200 is better) no_headphones, No headphone effect no_panning No panning no_postprocessing No postprocessing effects ntsc Uses NTSC timing (can be buggy) one_subsong Play only one subsong per file pal Uses PAL timing panning=x Set panning value to x player=name Set eagleplayer, where name is the directory entry in players/ dir. This option is not allowed in eagleplayer.conf. reject Reject a song (usable for blacklisting). This option is not allowed in eagleplayer.conf. resampler=x Set resampling method silence_timeout=x Set silence timeout speed_hack Enable speed hack subsongs=x,y,... Set playable subsong (not implemented yet) subsong_timeout=x Set subsong timeout timeout=x Set timeout comment is a tag after which everything is considered just a comment about the line. Those options should be self-explanatory ;) A few example lines for song.conf: md5=09ad7aed28ec0043e232060546259767 broken_subsongs comment cust.Bub- ble_Bobble reports wrong subsong numbers md5=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx speed_hack comment this is the only song in format foo that needs speedhack md5=yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy led_off comment this song just sucks with filtering md5=zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz led_on comment turning LED ON makes this song sound c00l md5=wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww no_panning subsongs=2,5 comment only subsongs 2 and 5 sound good md5=c351076a79033336a0ea1747b6d78783 ntsc comment Play Platoon song in NTSC mode uade.conf uade.conf sets default variables for configuration settings. Each line may contain at most one command. The configuration file is read from users home directory ( $HOME/.uade/uade.conf ) if it exists. If it does not exist, it is tried from $PREFIX/share/uade/uade.conf . Making a copy of the uade.conf into $HOME/.uade/ can be useful for users. The same uade.conf controls settings for all frontends. Specifi- cally, this includes the audacious plugin too. The valid commands are: ao_option x:y Set libao driver option with key=x and value=y. See --ao-option=x:y for more information. Example: ao_option dev:default buffer_time x Set audio buffer length to x milliseconds. cygwin Set Cygwin path name workaround mode. See help for --cygwin option. detect_format_by_content Only detect files by content. Do not use file name based heuristics. disable_timeout A song will never timeout. enable_timeout A will timeout normally. filter x Set filter emulation mode to be A500, A1200 or none. force_led x Force LED "on" or "off" force_led_off Same as "force_led off" force_led_on Same as "force_led on" frequency x Set output frequency to x Hz. The default is 44,1 kHz. gain x Set gain value to x which is a non-negative value. The default value is 1,0. headphones Enable headphone effect. headphones2 Enable headphone effect 2. ignore_player_check Force eagleplayers to recognize any given song. no_content_db Disable song end database. no_ep_end_detect Disable eagleplayers ability to end song. See --no-ep-end-detect. no_filter Same as "filter none". ntsc Set NTSC mode. (might not work properly) one_subsong Play only one subsong per file. pal Set PAL mode. panning x Set panning value to x inside range [0, 2]. The default is 0. random_play Set random play or shuffle mode. Used for uade123 only. recursive_mode Scan directories recursively. Used for uade123 only. resampler x Set resampling method to x. It is either default, sinc or none. silence_timeout x Set silence timeout value to x seconds. speed_hack Enable speed hack mode. subsong_timeout x Set subsong timeout value to x seconds. -1 implies no timeout. timeout x Set timeout value to x seconds. -1 implies no timeout. verbose Enable verbose mode EAGLEPLAYER OPTIONS Eagleplayers can be given song specific or general options in song.conf and eagleplayer.conf. Use epopt=x to set one option. It can be used many times. You can also issue eagleplayer options from the command line (so that they are not stored into song.conf) by using -x option: "uade123 -x type:nt10 mod.foobar" will play mod.foobar as a Noise- tracker 1.0 module. With -x option "epopt=" prefix must be dropped. Valid options for eagleplayers: PTK-Prowiz epopt=vblank epopt=type:<tracker> <tracker> can be one of the following: st20 (Soundtracker 2.0 - 2.3) st24 (Soundtracker 2.4) nt10 (Noisetracker 1.x) nt20 (Noisetracker 2.x) m&k. (Noisetracker M&K.) flt4 (Startrekker 4ch) pt10c (Protracker 1.0c) pt11b (Protracker 1.1b - 2.1a) pt23a (Protracker 2.3) pt30b (Protracker 3.0b) example: uade123 -x type:nt20 mod.foobar Infogrames epopt=timer=x This option is used to set playback speed. Higher value means slower playback. This is the CIA timer register value. x is a hexadecimal value. The default is 1a00. example: uade123 -x timer=24ff gobliins31.dum SUPPORTED FORMATS Quite a few. See documentation, eagleplayer.conf and players/ direc- tory. RESAMPLERS Internally Amigas Paula chip operates at 3,5 MHz, and in theory, it is possible to generate a 1,75 MHz output signal. However, maximum DMA based sample rate, which is approximately 28876 Hz, is limited by chip memory access slots. These frequencies are not well supported with cur- rent computer equipment, and synthesizing samples at 3,5 MHz would be very slow. Regardless, in principle UADE "samples" Paula's output at 3,5 MHz and then immediately resamples it to playback frequency, which is usually 44,1 kHz or 1/80th of the sample rate of Paula. This output frequency is configurable, see uade.conf section. UADE currently supports three resampling methods: none that directly discards 79 of the 80 samples; default that estimates the true output value by averaging the last 80 samples together (also known as boxcar filter). This is the recommended resampler; and sinc that trades cpu for best high-frequency component removal through low-pass filtering the audio with a sinc function. The default resampler is a very good choice because it is pretty accu- rate and very fast, but loses some treble and causes some aliasing dis- tortion. For high frequencies (above 44,1 kHz), sinc becomes an option and is probably the best choice. FILTERS The Amiga output circuitry contains a fixed low-pass filter on most models, and a dynamic lowpass filter connected to the power LED (known as the "LED filter"), which can be toggled on and off. On the Amiga 1000, which was the first Amiga computer, the LED filter was perma- nently enabled. In the succeeding models, such as the Amiga 500, the LED filter was made optional, but another, permanent RC filter circuit was added on the audio output. Finally, for Amiga 1200, the static fil- ter was removed altogether, and only the LED filter remains. These low-pass filters were most likely added in order to make Amiga's pulse-based audio sound softer, and to make lower sampling frequencies useful for audio playback: by removing some of the treble, the hard edges of a pulse waveform become rounder and the waveform undulates more smoothly, mimicking many instrument sounds more accurately at lower sampling rates. The downside of fixed filtering is that the smoothing occurs with all the higher sampling rates, too. However, with the introduction of Amiga 1200 and its AGA graphics modes and spacious chip memory, it became possible to read more than 28876 samples per second from chip memory, and we guess that the fixed low- pass filter was removed entirely in favour for accurate treble re- sponse. The filter emulation is based on hi-fi measurements made on two partic- ular Amiga computers, Amiga 500 and Amiga 1200. The Amiga 500 output path was found to contain a 6 dB/oct lowpass RC filter circuit with cutoff at 5000 Hz. (Some early Amiga 500 revisions may have had 4500 Hz tuning for this filter.) The LED filter was found to be a 12 dB/oct Butterworth lowpass filter with cutoff value at approximately 3300 Hz. The details of the Amiga 1000 filter arrangements are not known, be- cause nobody has been able to provide any samples. Accurate digital simulation of analog filters is usually not possible without some upsampling. When "default" method is used, the samples are generated at the playback frequency, and the post-processing step that applies filtering is composed with a series of hand-fitted first-order IIR filters that together approximate the correct frequency response for the expected synthesis frequencies of 44,1 kHz or 48 kHz. The sinc resampling method, in turn, emulates the filters directly at Paula's 3,5 MHz sampling frequency by folding the filters directly into the shape of the fundamental synthesis unit, the BLEP. In the sinc mode, the filters are realised by fitting the digital models for (slightly modified) butterworth and RC filters with the parameters men- tioned above. Therefore sinc can be used on all frequencies above 44.1 kHz without quality loss (or increase, for that matter). UAERC You can edit PREFIX/share/uaerc to edit Amiga emulation related vari- able. INCREASING AMIGA MEMORY FOR LARGE MODULE FILES uaerc can be edited to increase Amiga memory. The variable named chip- mem_size (4 by default) controls the memory allocation. The allocated memory size is determined by formula chipmem_size * 512 KiB, and thus, there is 2 MiB of memory available for modules by default. This vari- able can be set up to 16, which would mean 8 MiB of memory for modules. FILES PREFIX/bin/uade123 Player executable. PREFIX/share/uade/eagleplayer.conf or $(HOME)/.uade/eagleplayer.conf PREFIX/share/uade/score MC68000 sound core file PREFIX/share/uade/players MC68000 eagleplayer binaries PREFIX/share/uade/song.conf or $(HOME)/.uade/song.conf PREFIX/share/uade/uade.conf or $(HOME)/.uade/uade.conf Main configuration file PREFIX/share/uade/uaerc Configuration file for UAE PREFIX/share/doc/uade-* UADE documentation PREFIX/share/man/man1/uade123.1 This man page. EXAMPLES uade123 -zr /path Play files under /path recursively in random order. uade123 -f output.wav mod.foo uade123 --set=epopt=type:pt10 mod.foo Set protracker compatibility to Protracker 1.0c for mod.foo. After this uade will remember epopt=type:pt10 for mod.foo. See -x option also. TIPS AND WORKAROUNDS 1. uade123 users libao to play audio. However, some distributions have a broken or badly configured libao. This can be workarounded with a simple shell script that uses ALSA's aplay for playback. It works for ordinary cases. You can call it hackuade and issue "hackuade -zr /music/chip" on the command line. Put hackuade script somewhere in your command $PATH: #!/bin/sh uade123 -c "$@" |aplay INFORMATION SOURCES Project home: https://zakalwe.fi/uade IRC channel: #amigaexotic at IRCNet Project manager: Heikki Orsila <heikki.orsila@iki.fi> VERSION CONTROL SERVER git clone https://gitlab.com/uade-music-player/uade AUTHORS UADE project was started by Heikki Orsila <heikki.orsila@iki.fi>. There have been many other contributors. Most notable contributors are Michael 'mld' Doering (for almost anything), Harry 'Piru' Sintonen (MorphOS port) and Antti S. Lankila <alankila@bel.fi> (Amiga filter em- ulation, resampling and postprocessing effect code). Heikki Orsila and Michael Doering 2007-02-16 UADE(1)
NAME | SYNOPSIS | DESCRIPTION | FILE FORMAT DETECTION | COMMAND LINE OPTIONS | ACTION KEYS | CONFIGURATION FILES | eagleplayer.conf | song.conf | uade.conf | EAGLEPLAYER OPTIONS | SUPPORTED FORMATS | RESAMPLERS | FILTERS | UAERC | FILES | EXAMPLES | TIPS AND WORKAROUNDS | INFORMATION SOURCES | VERSION CONTROL SERVER | AUTHORS
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