NAME

SYNOPSIS

DESCRIPTION

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 and xmms (1).

Section FILE FORMAT DETECTION explains hardships of recognizing amiga formats and consequently problems it may cause for the user (and authors).

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 altering 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 problems. 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

COMMAND LINE OPTIONS

-@ 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 option 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.

--cygwin

Enable Cygwin workaround mode that converts X:\foo style Windows names into /cygdrive/X/foo. This can be set by default with "cygwin" keyword in uade.conf.

-d, --debug

Turn debug mode on. Experts only.

--detect-format-by-content

Set file magic mode. The songs are only detected by file contents. 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 difference 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 and XMMS plugins).

-G, --gain=x

Set volume gain to x. x must be a non-negative value. The default 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 eagleplayer. 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 channel 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 releases may help revealing the problem source.

--scope

Turn on audio register debug mode. Prints Paula hardware register 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

--speed-hack

Enable speedhack. Emulate all instructions to be executed in one m68k cycle. Some players, such as EMS v6, take too many m68k cycles 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 situations.

-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 detected the (sub)song ends.

-z, --shuffle

Randomize playlist order before playing.

ACTION KEYS

CONFIGURATION FILES

eagleplayer.conf

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

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
detect_format_by_name eagleplayer.conf only: the eagleplayer is detected by name extension only. Furthermore, any eagleplayer that recognizes the same file by content is ignored. Do not use this option without a good reason. Name extensions are unreliable.
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
vblank Play in vblank mode (works only for protracker variants)

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.Bubble_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

The valid commands are:

action_keys x Set action keys "off" or "on". 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_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. song_title x Set song title for GUI plugins according to given specification x. See section SONG TITLE SPECIFICATION. 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

SONG TITLE SPECIFICATION

%F - filename %T - songtitle %P - player or formatname %A - minimum subsong %B - current subsong %C - maximum subsong %X - only display subsongs when more than one

An example of alternative specification that displays the song name received from the eagleplayer (as opposed to file name):

song_title %T %X [%P]

EAGLEPLAYER OPTIONS

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

RESAMPLERS

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 accurate and very fast, but loses some treble and causes some aliasing distortion. For high frequencies (above 44,1 kHz), sinc becomes an option and is probably the best choice.

FILTERS

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 lowpass filter was removed entirely in favour for accurate treble response.

The filter emulation is based on hi-fi measurements made on two particular 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, because 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 mentioned above. Therefore sinc can be used on all frequencies above 44.1 kHz without quality loss (or increase, for that matter).

UAERC

INCREASING AMIGA MEMORY FOR LARGE MODULE FILES

uaerc can be edited to increase Amiga memory. The variable named chipmem_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 variable can be set up to 16, which would mean 8 MiB of memory for modules.

FILES

PREFIX/bin/uade123

Player executable.

PREFIX/share/uade2/eagleplayer.conf or $(HOME)/.uade2/eagleplayer.conf

PREFIX/share/uade2/score

MC68000 sound core file

PREFIX/share/uade2/players

MC68000 eagleplayer binaries

PREFIX/share/uade2/song.conf or $(HOME)/.uade2/song.conf

PREFIX/share/uade2/uade.conf or $(HOME)/.uade2/uade.conf

Main configuration file

PREFIX/share/uade2/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

Public web forum

(primary place for all discussion):
http://board.kohina.net/index.php?c=5

Project home:

http://zakalwe.fi/uade

IRC channel:

#amigaexotic at IRCNet

Project manager:

Heikki Orsila <heikki.orsila@iki.fi>

VERSION CONTROL SERVER

AUTHORS