jack-record − JACK Capture Client
jack−record [options] sound−file
−b : Set the disk buffer size in frames (default=4096). This value must be a power of two. If the JACK period size at any time exceeds this value the recorder will halt.
−f : Set the file format (default=0x10006). The number is a bitwise−or of two values, the first describes the file type, the second the data type. The default value of 0x10000 | 0x00006 describes a thirty−two bit floating point WAV file. 0x2 is 16−bit and 0x3 24−bit.
−m : Set the minimal disk transfer size in frames (default=32). This is an optimization switch.
−n : Set the number of input channels to create (default=2).
−o : Integer offset for port connection pattern (default=0).
−p : A pattern describing the JACK ports to connect to, ie. SuperCollider:out_%d (default=nil).
−s : Capture to a set of single channel sound files. The sound file name must be a valid template.
−t : Set a timer to stop the recording after the specified number of seconds (default=−1).
jack−record is a light−weight JACK capture client to write an arbitrary number of channels to disk. It implements no connection logic, use jack−plumbing(1) instead.
If the default mode a single multiple channel sound file is written. If the −s option is given a set of single channel sound files are written. In this case the sound file name must be a valid template, the substring %d is replaced with the channel number counting from zero.
jack−record will write files in any format supported by libsndfile. The table below shows the most common file format masks. For other values see the file sndfile.h.
Format Code Description −−−−−− −−−− −−−−−−−−−−− SF_FORMAT_WAV 0x10000 Microsoft WAV format SF_FORMAT_AIFF 0x20000 Apple/SGI AIFF format SF_FORMAT_PCM_16 0x00002 Signed 16 bit data SF_FORMAT_PCM_24 0x00003 Signed 24 bit data SF_FORMAT_PCM_32 0x00004 Signed 32 bit data SF_FORMAT_FLOAT 0x00006 32 bit float data
Rohan Drape http://rd.slavepianos.org/
jackd(1), libsndfile(3) http://mega−nerd.com/libsndfile/
Rohan Drape <rd@slavepianos.org>
Author.