pCP Team 3 April 2024 pCP 5.0.0 Components

Squeezelite is a small headless Squeezebox emulator for Linux using ALSA audio output (and other platforms using portaudio).

It is aimed at supporting high quality audio including USB dac based output at multiple sample rates including 44.1/48/88.2/96/176.4/192/352.8/384kHz.

  • Squeezelite is always included in the piCorePlayer image.
  • Originally developed and released by Adrian Smith.
  • Currently maintained by Ralph Irving.

Squeezelite Help

Squeezelite v1.9.7-1237-pCP, Copyright 2012-2015 Adrian Smith, 2015-2020 Ralph Irving. See -t for license terms
Usage: squeezelite [options]
 -s <server>[:<port>]  Connect to specified server, otherwise uses autodiscovery to find server
 -o <output device>    Specify output device, default "default", - = output to stdout
 -l                    List output devices
 -a <b>:<p>:<f>:<m>    Specify ALSA params to open output device, b = buffer time in ms or size in bytes, p = period count or size in bytes, f sample format (16|24|24_3|32), m = use mmap (0|1)
 -a <f>                Specify sample format (16|24|32) of output file when using -o - to output samples to stdout (interleaved little endian only)
 -b <stream>:<output>  Specify internal Stream and Output buffer sizes in Kbytes
 -c <codec1>,<codec2>  Restrict codecs to those specified, otherwise load all available codecs; known codecs: flac,pcm,mp3,ogg,aac,wma,alac,ops,dsd (mad,mpg for specific mp3 codec)
                       Codecs reported to LMS in order listed, allowing codec priority refinement.
 -C <timeout>          Close output device when idle after timeout seconds, default is to keep it open while player is 'on'
 -d <log>=<level>      Set logging level, logs: all|slimproto|stream|decode|output|ir, level: info|debug|sdebug
 -G <Rpi GPIO#>:<H/L>  Specify the BCM GPIO# to use for Amp Power Relay and if the output should be Active High or Low
 -e <codec1>,<codec2>  Explicitly exclude native support of one or more codecs; known codecs: flac,pcm,mp3,ogg,aac,wma,alac,ops,dsd (mad,mpg for specific mp3 codec)
 -f <logfile>          Write debug to logfile
 -i [<filename>]       Enable lirc remote control support (lirc config file ~/.lircrc used if filename not specified)
 -m <mac addr>         Set mac address, format: ab:cd:ef:12:34:56
 -M <modelname>        Set the squeezelite player model name sent to the server (default: SqueezeLite)
 -n <name>             Set the player name
 -N <filename>         Store player name in filename to allow server defined name changes to be shared between servers (not supported with -n)
 -W                    Read wave and aiff format from header, ignore server parameters
 -p <priority>         Set real time priority of output thread (1-99)
 -P <filename>         Store the process id (PID) in filename
 -r <rates>[:<delay>]  Sample rates supported, allows output to be off when squeezelite is started; rates = <maxrate>|<minrate>-<maxrate>|<rate1>,<rate2>,<rate3>; delay = optional delay switching rates in ms
 -S <Power Script>     Absolute path to script to launch on power commands from LMS
 -R -u [params]        Resample, params = <recipe>:<flags>:<attenuation>:<precision>:<passband_end>:<stopband_start>:<phase_response>,
                        recipe = (v|h|m|l|q)(L|I|M)(s) [E|X], E = exception - resample only if native rate not supported, X = async - resample to max rate for device, otherwise to max sync rate
                        flags = num in hex,
                        attenuation = attenuation in dB to apply (default is -1db if not explicitly set),
                        precision = number of bits precision (NB. HQ = 20. VHQ = 28),
                        passband_end = number in percent (0dB pt. bandwidth to preserve. nyquist = 100%),
                        stopband_start = number in percent (Aliasing/imaging control. > passband_end),
                        phase_response = 0-100 (0 = minimum / 50 = linear / 100 = maximum)
 -D [delay][:format]   Output device supports DSD, delay = optional delay switching between PCM and DSD in ms
                        format = dop (default if not specified), u8, u16le, u16be, u32le or u32be.
 -v                    Visualiser support
 -O <mixer device>     Specify mixer device, defaults to 'output device'
 -L                    List volume controls for output device
 -U <control>          Unmute ALSA control and set to full volume (not supported with -V)
 -V <control>          Use ALSA control for volume adjustment, otherwise use software volume adjustment
 -X                    Use linear volume adjustments instead of in terms of dB (only for hardware volume control)
 -z                    Daemonize
 -Z <rate>             Report rate to server in helo as the maximum sample rate we can support
 -t                    License terms
 -?                    Display this help text


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