diff options
Diffstat (limited to 'jackd/jackd.1.in')
| -rw-r--r-- | jackd/jackd.1.in | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/jackd/jackd.1.in b/jackd/jackd.1.in index 1bc7c9c..6b86210 100644 --- a/jackd/jackd.1.in +++ b/jackd/jackd.1.in @@ -28,7 +28,7 @@ For the latest JACK information, please consult the web site, .br Select the audio interface backend. The current list of supported backends is: \fBalsa\fR, \fBcoreaudio\fR, \fBdummy\fR, \fBfreebob\fR, -\fBoss\fR \fBsun\fR and \fBportaudio\fR. They are not all available +\fBoss\fR \fBsun\fR \fBportaudio\fR and \fB sndio. They are not all available on all platforms. All \fIbackend\-parameters\fR are optional. .TP \fB\-h, \-\-help\fR @@ -523,6 +523,43 @@ Driver name (default: none) .TP \fB\-z \-\-dither\fR Dithering mode (default: none) +.SS SNDIO BACKEND PARAMETERS +.TP +\fB\-r, \-\-rate \fIint\fR +Specify the sample rate. The default is 44100. +.TP +\fB\-p, \-\-period \fIint\fR +Specify the number of frames between JACK \fBprocess()\fR calls. This +value must be a power of 2, and the default is 1024. If you need low +latency, set \fB\-p\fR as low as you can go without seeing xruns. A larger +period size yields higher latency, but makes xruns less likely. The JACK +capture latency in seconds is \fB\-\-period\fR divided by \fB\-\-rate\fR. +Note that this value is mostly advisory when aucat server is running +and may be updated internally. +.TP +\fB\-n, \-\-nperiods \fIint\fR +Specify the number of periods in the hardware buffer. The default is +2. The period size (\fB\-p\fR) times \fB\-\-nperiods\fR times four +(assuming 2 channels 16-bit samples) is the JACK buffer size in bytes. +The JACK output latency in seconds is \fB\-\-nperiods\fR times +\fB\-\-period\fR divided by \fB\-\-rate\fR. +Note that this value is mostly advisory when aucat server is running +and may be updated internally. +.TP +\fB\-w, \-\-wordlength \fIint\fR +Specify the sample size in bits. The default is 16. +.TP +\fB\-i, \-\-inchannels \fIint\fR +Specify how many channels to capture (default: 2) +.TP +\fB\-o, \-\-outchannels \fIint\fR +Specify number of playback channels (default: 2) +.TP +\fB\-d, \-\-device \fIdevice_file\fR +Specify device for capture and playback (default: NULL) +.TP +\fB\-b, \-\-ignorehwbuf \fIboolean\fR +Specify, whether to ignore hardware period size (default: false) .SH "EXAMPLES" .PP Print usage message for the parameters specific to each backend. @@ -544,6 +581,8 @@ Print usage message for the parameters specific to each backend. \fBjackd \-d sun \-\-help\fR .br \fBjackd \-d portaudio \-\-help\fR +.br +\fBjackd \-d sndio \-\-help\fR .PP Run the JACK daemon with realtime priority using the first ALSA hardware card defined in \fB/etc/modules.conf\fR. |