Version 2022/06/22
Created 2018/01/09
Category Max/Msp Externals
License GNU/LGPL external
Files 11ffload~.mxo 11ffload~.mxe64 11ffload~.maxhelp read_me_on_Windows.txt windows_support/
ZipSize 34.75 MB
Downloads 1,390

11ffload~ starts a separate thread to decode audio data and write into a buffer~.

Compared to buffer~‘s own loading of files, we are not blocked until the complete file has been decoded and written to the refered buffer~. As soon as some data has been written to the target buffer, outlet 1 outputs properties of the source and we can start playback while the remaining data is written.
Outlet 2 will confirm with a bang when the write operation is completed.
Outlet 3 outputs a bang if no audio can be found in the source file or an error occured while processing the file.

We can abort a running decode process with a new load request.  

Based on ffmpeg, we support a lot of video and audio file formats.



set [buffername] - set the target buffer~;

replace [filename] [opt. parameters] - load file into buffer~;

importreplace [filename] [opt. parameters] - replace buffer~ with part of file;

import [filename] [opt. parameters] - load part of file into buffer~;

info [filename] - only info output (outlet1);

break - stop decoding;


resample [int] - resample loaded audio, see inspector for available values;

metadatadict [dictname] - fill a dict with the metadata of a loaded file;

debug 1/0 - print progress to Max window;

more attributes related to the "import" message (see help file)


With "importreplace" and "import" messages, you can use "buffer=<name>" instead of a filename to use another buffer~ as source.

You can use "dict=<dictname>" instead of a filename. Other externals can write a C-string to keys "name" and "path" of a dict. You can open the file without using Max symbol table for the file name.

Source Code:

soon on github



  • added importreplace, import and info messages
  • added resample, metadatadict and import related attributes
  • added "channel route" argument for all messages
  • added ability to import from another buffer~
  • updated help patcher
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