SIDPLAYFP(1) User Programs SIDPLAYFP(1) NAME sidplayfp - a C64 and SID chip emulator for playing Commodore 64 music. SYNOPSIS sidplayfp [OPTIONS] datafile DESCRIPTION Sidplayfp is a music player that emulates various components from a Com- modore 64 (C64) computer. The result is a program which can load and exe- cute C64 machine code programs which produce music and sound. Sidplayfp has been designed for accuracy which results in a quite high CPU usage. Additional playback modes have, however, been provided to allow playback on low-spec machines at the cost of said accuracy. OPTIONS -h, --help Display help. -h, --help-debug Display additional options helpful for debugging. -fo<a|b> <num> Set fade-out time in seconds (default: 0). Ends a(fter) or starts b(efore) actual song end time, the specified number of seconds wil be added to the tune length when after. If not specified starts after. Mostly useful for looping tunes. -f<num> Set audio output frequency in Hz (default: 48000). -nf No filter emulation. This will reduce CPU overhead at the cost of re- duced emulation quality. -s Stereo playback. If the tune is identified as stereo then sid 1 and 2 become the left and right channels respectively. For three sid tunes the chips are mixed as left, center and right. -m Mono playback. -v|q[level] Verbose or quiet (no time display) console output while playing. Can include an optional level, defaults to 1. -b<num> Set start time in [mins:]secs[.milli] format (compatible with sid2wav). -ds<addr> Force dual sid environment by adding a second chip at specified ad- dress. This forces emulation of 2 sid-chips for stereo playback even if datafile is identified as only being mono. This occurs in the case of the stereo prg format as currently there is no way to identify them. Stereo MUS and SID files are however automatically detected. The sec- ond sid may be installed in the 0xD420-0xD7FF or 0xDE00-0xDFFF address range. Address may be specified in exadecimal (e.g -ds0xd420) or dec- imal (e.g. -ds54304) format. -ts<addr> Add a third chip at specified address. The sid may be installed in the 0xD420-0xD7FF or 0xDE00-0xDFFF address range. Address may be speci- fied in exadecimal (e.g -ts0xd440) or decimal (e.g. -ts54336) format. -u<num> Mute a channel. May be used more than one time. Channel 1 to 3 are for the first SID chip while channels from 4 to 6 are for the second one and 7 to 9 for the third. -g<num> Mute samples. May be used more than one time, 1 for the first SID, 2 for the second one and 3 for the third. -p<num> Set bit precision for file saving. The default is 16 to create 16 bit signed samples, but can be set to 32 (32 bit float). Other values will cause invalid output. -o<num> Select start track number (default: preset). -o<l|s> [num] Option 'l' will select continuous track looping while 's' will play only the current track ignoring the others. The options can be com- bined and may include the track selection. The following variations are possible: -ol<num>: will loop selected track allowing moving to an- other one; -os<num>: will play selected track and then stop; -ols<num>: will loop selected track; -t<num> Set play length in [mins:]secs[.milli] format (0 is endless). -v<n|p>[f] Set VIC clock speed. 'n' is NTSC (America, 60Hz) and 'p' is PAL (Eu- rope, 50Hz). Providing an 'f' will prevent speed fixing that tries to compensate automatically for the speed difference. Removing speed fix- ing simulates what happens on a real C64. Options can be written as: -vnf or -vn -vf. -m<o|n>[f] Set SID chip model. 'o' is the old 6581 and 'n' is the new 8580. Pro- viding an 'f' will force the selected model overriding the one speci- fied by the tune. --digiboost Enable digiboost hack for 8580 model so the digi samples become audi- ble. -r<i|r>[f] Set resampling mode. 'i' is interpolation (less expensive) and 'r' re- sampling (accurate). Providing an 'f' will provide faster resampling sacrificing quality. Fast resampling is available only for reSID emu- lation. Options can be written as: -rif or -ri -rf. -w, --wav[name] Create WAV-file. The default output filename is <datafile>[n].wav where [n] is the tune number should there be more than one in the sid. This allows batch conversion of sid tunes without them overwriting each other. By providing a name it is possible to override this default be- havior. The output file will be <name> with no tune number added and the extension .wav appended if no extension is given. --au[name] Create AU-file. The default output filename is <datafile>[n].au. Same notes as the wav file applies. --resid Use VICE's original reSID emulation engine. --residfp Use reSIDfp emulation engine. --sidlite Use sidlite emulation engine. --hardsid Use HardSID device. --exsid Use exSID device. --usbsid Use USBSID-Pico device. --cpu-debug Display CPU register and assembly dumps, available only for debug builds. --delay=[num] Simulate C64 power on delay as number of CPU cycles. If greater than 8191 the delay will be random. This is the default. --fcurve=<num>|auto Controls the filter curve in the ReSIDfp emulation. Ranges from 0.0 (light) to 1.0 (dark), the default value is 0.5. If set to auto it will choose a predefined value for 6581 depending on the tune author. --frange=<num>|auto If available controls the filter range for the 6581 in the ReSIDfp emu- lation. Ranges from 0.0 (light) to 1.0 (dark), the default value is 0.5. If set to auto it will choose a predefined value for 6581 depend- ing on the tune author. -cw<w|a|s> Set the strength (width) of combined waveforms. 'w' for weak (thin) waves, 'a' for average waves, and 's' for strong (wide) waves. -co Enable old caps for 6581 model. Use old 2200pF caps mounted on ASSY 326298 in place of the standard 470pF caps producing a lower cutoff. --noaudio Run without an audio output device. --nosid Run without sid emulation. --none Run with no audio output device and no sid emulation. Key bindings 1-9 Mute/unmute voice. 1-3 are for the first chip and so on. a,s,d Mute/unmute samples. a for the first chip and so on. f Toggle filter. p/space Pause/unpause playback. h/F1Show/hide help. Esc/q Quit player. Up/Down Arrows Increase/reset playback speed. Left/Right Arrows Move to previous/next subtune. Home/End Arrows Go to first/last subtune. ENVIRONMENT VARIABLES HVSC_BASE The path to the HVSC base directory. If specified the songlength DB will be loaded from here and relative SID tune paths are accepted. FILES sidplayfp.ini The configuration file. See sidplayfp.ini(5) for further details. kernal The C64 Kernal ROM dump file. basic The C64 BASIC ROM dump file. chargen The C64 Character Generator ROM dump file. BUGS The upstream bug tracker can be found at <https://github.com/libsid- playfp/sidplayfp/issues/>. SEE ALSO sidplayfp.ini(5) NOTES ROM dumps are not embedded due to copyright issues and must be supplied by the user. Check the sidplayfp.ini(5) documentation for configuration de- tails and default search paths. AUTHORS Leandro Nini Current maintainer. Simon White Wrote the original Sidplay2. Dag Lem Wrote the reSID emulation engine. Antti S. Lankila Wrote the reSIDfp emulation engine as a fork of reSID 0.16. The Vice team Large part of the emulation is based on the VICE's code. AndrA(C) Fachat Wrote the original reloc65 utility. Michael Schwendt Wrote the original SidTune library. Mikko Kilponen Wrote the original man page. Stian Skjelstad SID status display. Michael Hartmann filter curves. Thibaut VARENE exSID support. LouDUSBSID-Pico support. Craig Chamberlain and Harry Bratt Authors of COMPUTE!'s Sidplayer. David Reid Author of miniaudio. Victor Zverovich Author of fmt. Steffen SchA1/4mann Author of filesystem. RESOURCES Home page: <https://github.com/libsidplayfp/> Sidplay2 homepage: <http://sidplay2.sourceforge.net/> High Voltage Sid Collection (HVSC): <http://hvsc.c64.org/> Compute's Gazette Sid Collection (CGSG): <https://www.c64music.co.uk/> COPYING Copyright (C) 2000-2004 Simon White Copyright (C) 2007-2010 Antti Lankila Copyright (C) 2009-2015 VICE Project Copyright (C) 2010-2026 Leandro Nini This program is free software; you can redistribute it and/or modify it un- der the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FIT- NESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. perl v5.38.2 2026-06-21 SIDPLAYFP(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | Key bindings | ENVIRONMENT VARIABLES | FILES | BUGS | SEE ALSO | NOTES | AUTHORS | RESOURCES | COPYING
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