Forums > MaxMSP

seq~ read and write

October 18, 2011 | 5:20 pm

i am trying out writing sequencers into seq~ with the aim to be able to store them as patch of the patch then load them later. writing them doesnt seem to be a problem using the write message, i get a dialogue asking me to name and save in a location, but when i try and read message and navigate to where i saved the text file they are greyed out and dont give me the option to load them.

what am i doing wrong?

thanks
ned


October 19, 2011 | 11:25 am

anyone?


October 19, 2011 | 12:33 pm

Make sure that the filename has a .txt extension.


October 19, 2011 | 4:31 pm

i knew it had to be something simple and obvious.

thanks for that i’ll give it a try.


October 19, 2011 | 4:42 pm

well i gave it a try and writing was successful and reading was too, however it seems that once i loaded the txt file it wouldn’t play out. i tried inserting a message to show me the info as it was playing but there was no sound…


October 19, 2011 | 5:25 pm

As I understand it, seq~ is a sequencer for control data, not audio..


October 19, 2011 | 5:44 pm

understood, what i should have said was that once i read the txt file, it seemed to have loaded and was playing, but didnt seem to be sending out the data, going to a midi out, that was going into a synth in ableton… hence my confusion over why i couldn’t ‘hear’ the data as it were… :~


October 19, 2011 | 6:05 pm

Ok, can you see the recorded data in the text file?
If so, connect ‘print’ to seq~ output to check what’s actually sent out.


October 19, 2011 | 6:24 pm

i tired that and the print window showed it was reading, but in between each event i got a warning saying "object = midi flush message = does not understand list" i’m pasting the patch to see if it makes htings easier, its maxforlive by the way

– Pasted Max Patch, click to expand. –

i guess the midi flush is the problem?


October 19, 2011 | 7:57 pm

The problem is that you are recording a stream of raw midi bytes without converting into lists.

Quote from the reference page:

"Note: seq~ can be used to sequence MIDI data if the MIDI input stream is converted into lists of MIDI events. This conversion is necessary to avoid outputting a corrupted MIDI stream which would occur if only the raw int messages of a MIDI stream were sequenced individually and the seq~ object were not doing a simple forward linear playback."


October 19, 2011 | 8:51 pm

good call. i decided to copy the example in that midi subpatch and use that rather than try to rebuild it.

so now i can indeed read and write sequences to text files. great :)

my next question is how can i have those text files as part of the patch, with the aim to record sequences live or recall ‘recorded’ sequencers in real time? i thought a message ‘read = name of text file’ would do it, but that doesnt seem to work. do i have to save the text file in a certain place?

would storing them in a coll be better?

thanks for your help.


October 19, 2011 | 11:44 pm

The message ‘read filename’ (without ‘=’) should work provided the file is stored in the search path of Max.

You may also look at the [folder] object which allows to fill a menu with the names of files in a folder.


October 20, 2011 | 7:10 am

i wasnt using the = in the messages, just in that post.

great i’ll give those a go. many thanks for your help. :)


October 20, 2011 | 11:43 am

the folder object is great. does that work with buffer~?


October 20, 2011 | 12:09 pm

Sure. The filenames of umenu are sent out on the middle outlet and can be used for anything you like.


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