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jack-file by Dan A. Muresan

Jack transport-centric utilities for audio playback

Jack-File contains two utilities for Jack transport-bound playback:

file2jack is an audio player that maps files onto the (optionally periodic) transport timeline. The player achieves periodicty (looping) without moving the transport (and thus without gaps): the looped segments are simply mapped to transport time-points. A picture is worth 10^n words:

|*****| FILE A | FILE B |******| FILE C | FILE C | FILE C | ...
      |        |        |      |        |        |        |
     10s      20s      30s    40s      50s      60s      70s

file2jack --at 10 -i A.flac --at 20 -i B.flac --at 40 -i C.flac --loop 40

In the example above (which assumes files A, B, C are all 10s long) the user has requested 10s of silence, then FILE A at 10s, then FILE B at 20s, then after 10 more seconds of silence, FILE C repeated periodically from 40s to infinity evert 10s.

jacktransportloop is a simpler way to loop other transport-aware players: it forces the Jack transport to loop between two time-points. When the transport reaches the loop endpoint, it is forced back to the starting point. This will loop any transport-aware player, but compared to file2jack it will create playback a gap at the end of the loop.

See README.txt in the distribution for more information.


Apache License, Version 2.0


Dan A. Muresan (danmbox at gmail dot com)


You can download this project in either zip or tar formats.

You can also clone the project with Git by running:

$ git clone git://