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Options
Type | Short | Long | Description | Hint |
---|---|---|---|---|
Option | c | cache | Path to a directory where files will be cached. | CACHE |
Option | system-cache | Path to a directory where system files (credentials, volume) will be cached. Can be different from cache option value. | SYSTEM_CACHE | |
Option | cache-size-limit | Limits the size of the cache for audio files. It's possible to use suffixes like K, M or G. | CACHE_SIZE_LIMIT | |
Flag | disable-audio-cache | Disable caching of the audio data. | ||
Option | n | name | Device name | NAME |
Option | device-type | The displayed device type in Spotify clients. Can be unknown , computer , tablet , smartphone , speaker , tv , avr (Audio/Video Receiver), stb (Set-Top Box), and audiodongle . Defaults to speaker
|
DEVICE_TYPE | |
Option | b | bitrate | Bitrate (96, 160 or 320). Defaults to 160 | BITRATE |
Option | onevent | The path to a script that gets run when one of librespot's events is triggered. | PROGRAM | |
Flag | v | verbose | Enable verbose output | PROGRAM |
Option | u | username | Username to sign in with | USERNAME |
Option | p | password | Password | PASSWORD |
Flag | disable-discovery | Disable discovery mode | ||
Option | backend | Audio backend to use. Use '?' to list options | BACKEND | |
Option | device | Audio device to use. Use '?' to list options (Only with the rodio /portaudio /alsa backends) |
DEVICE | |
Option | format | Output format (F32 , S32 , S24 , S24_3 or S16 ). Defaults to S16
|
FORMAT | |
Option | mixer | Mixer to use (softvol /alsa ) |
MIXER | |
Option | mixer-name |
alsa mixer name e.g PCM or Master . Defaults to PCM
|
MIXER_NAME | |
Option | mixer-card |
alsa mixer card, e.g hw:0 or similar from aplay -l . Defaults to default
|
MIXER_CARD | |
Option | mixer-index |
alsa mixer index, Index of the cards mixer. Defaults to 0 |
MIXER_INDEX | |
Option | initial-volume | Initial volume in %, once connected [0-100] | VOLUME | |
Flag | enable-volume-normalisation | Enables volume normalisation for librespot | ||
Option | normalisation-method | Specify the normalisation method to use - [basic , dynamic ]. Default is dynamic . |
NORMALISATION_METHOD | |
Option | normalisation-gain-type | Specify the normalisation gain type to use - [track , album ]. Default is album . |
GAIN_TYPE | |
Option | normalisation-pregain | A numeric value for pregain (dB). Only used when normalisation active. | PREGAIN | |
Option | normalisation-threshold | Threshold (dBFS) to prevent clipping. Default is -1.0. | THRESHOLD | |
Option | normalisation-attack | Attack time (ms) in which the dynamic limiter is reducing gain. Default is 5. | ATTACK | |
Option | normalisation-release | Release or decay time (ms) in which the dynamic limiter is restoring gain. Default is 100. | RELEASE | |
Option | normalisation-knee | Knee steepness of the dynamic limiter. Default is 1.0. | KNEE | |
Option | volume-ctrl |
[linear, log, fixed] Choose between a logarithmic (default), linear, or fixed volume scaling. |
||
Flag | disable-gapless | Disables gapless playback by forcing the sink to close b/w tracks | ||
Flag | autoplay | Autoplay similar songs when your music ends | ||
Option | zeroconf-port | The port that the HTTP server advertised on zeroconf will use [1-65535]. Ports <= 1024 may require root priviledges. | ||
Option | proxy | Use a proxy for resolving the access point. Proxy should be an HTTP proxy in the form http://ip:port , and can also be passed using the all-lowercase http_proxy environment variable. |
||
Option | passthrough | output raw Ogg data to stdout (needs pipe backend) |
librespot
supports ReplayGain volume normalisation, with the ReplayGain values provided by Spotify in the Ogg streams. As of librespot
0.2.0, there are two types of volume normalisation methods available:
The volume is increased or decreased as per the average ReplayGain of that track or its album. If that would result in peaks over a certain threshold (hard-coded at 0 dBFS for librespot
up to 0.1.6; -1 dBFS and configurable as of librespot
0.2.0), then the volume increase is limited so that the peak is exactly 0 dBFS. This gain is fixed for the entire duration of the track.
This is the only limiter available in librespot
up to 0.1.6.
(as of librespot
0.2.0)
Again the volume is increased or decreased as per the average ReplayGain of that track or its album. However, if this now results in peaks over the threshold (-1 dBFS by default), the gain is dynamically reduced for the duration of that peak, then recovered to the original target gain. This length of the attack and release for this reduction and recovery from zero to full effect by default mimic the Spotify client, and are configurable.
During the attack and release period, the rate of change from zero to full effect (the "knee") has a configurable steepness. By default this is 1.0, which means a linear slope. Values above 1.0 yield softer knees with a more gentle start and end but steeper rate of change mid-way. Values below 1.0 start and stop more sharply, and are flatter in between. Values of 0.0 and below first give an impulse response, then invert the limiter, and should not be used.
librespot
up to 0.1.6 always outputs 16-bit samples, except for JACK Audio where it converts to 32-bit output after volume control.
As of librespot
0.2.0, the audio output is still 16-bit by default, but can be configured to output 32-bit floating point (F32
), 32-bit integer (S32
), 24-bit PCM in a 32-bit word (S24
) or 24-bit integer packed as three bytes (S24_3
). Software volume control and normalisation is done before sample conversion, so that there is no loss of dynamic range.