1 .TH postfish 1 2004-05-29
3 postfish \- a heavyweight, Gtk2-based live recording postprocessor
18 is a digital audio post-processing, restoration,
19 filtering and mixdown tool. It works as a linear audio filter, much
20 like a rack of analog effects. The first stage of the filter
21 pipeline provides a bank of configurable per-channel processing
22 filters for up to 32 input channels. The second stage provides
23 mixdown of the processed input audio into a group of up to eight
24 output channels. The third stage applies processing filters to the
25 output group post-mixdown.
27 The Postfish is a stream filter; feed it audio from a list of files
28 or input stream, and it renders audio to standard out, as well as
29 optionally providing a configurable audio playback monitor via a
30 sound device. If the input audio is being taken from files,
31 Postfish also provides simple forward/back/cue seeking and A-B
36 .B \-c --configuration-file
37 load state from alternate configuration file
41 place following input files in a new channel grouping
49 Postfish takes WAV/AIFF input either from stdin or from a list of
50 files specified on the command line. A list of input files is handled
51 as time-continguous entries, each holding audio data that continues at
52 the instant the previous file ends. Files may also be arranged into
53 groups with -g; each group represents additional input channels
54 parallel to preceeding groups. All input files must be the same
55 sampling rate. Files in a group must have the same number of
60 Files a.wav, b.wav, c.wav and d.wav are all four channels and
63 .B postfish a.wav b.wav c.wav d.wav
65 This command line treats the input as forty minutes of four channel
66 audio in the order a.wav, b.wav, c.wav, d.wav.
68 .B postfish a.wav b.wav \-g c.wav d.wav
70 This command line treats the input as twenty minutes of eight channel
71 audio. Channels 1-4 are taken from files a.wav and b.wav while channels
72 5-8 are taken from files c.wav and d.wav.
74 .B cat a.wav | postfish
76 This command line sends a.wav to Postfish as a non-seekable stream
77 of four-channel data. If the WAV (or AIFF) header is complete, Postfish
78 obeys the length encoded in the header and halts after processing to
79 that length. If the data length in the header is unset (0 or -1),
80 Postfish will continue processing data until EOF on stdin.
84 Postfish writes output to stdout.
86 If stdout is piped, the output is nonseekable and Postfish marks the
87 produced header incomplete (length of -1). Stopping and re-starting
88 processing writes a fresh stream to stdout.
90 If stdout is redirected to a file, Postfish will write a complete header
91 upon processing halt or program exit. If processing halts and restarts,
92 the file is re-written from scratch.
94 If stdout is a pipe or redirected to a file, the user may specify
95 parallel audio monitor through the audio device using the 'mOn' activator
96 button in the main panel's 'master' section, or on the output config
97 panel. The audio device selected for playback is configurable on the
100 If stdout is redirected to an audio device, output is sent to that audio
101 device exclusively and the 'mOn' activator on the main panel will not
106 By default, persistent panel state is loaded from the file
107 'postfish-staterc' in the current working directory. Postfish rewrites
108 this file with all current panel state upon exit. -c specifies loading
109 from and saving to an alternate configuration file name.
113 This is Postfish's first prerelease; none known but many certainly exist.
117 Monty <monty@xiph.org>