Re: [PATCH] add aplaymidi & arecordmidi utils

[Will <walsac2@liam2.demon.co.uk>]

Clemens Ladisch <clemens@ladisch.de> wrote:
>Will wrote:
>> How easy would it be to make aplaymidi be able to adjust the playback speed
>> like playmidi?  (playmidi -t 0.5 music.mid plays at twice the default speed)
>
>Very easy.

1 hour of code changes?

>> How easy would it be to make aplaymidi be able to move forwards and backwards
>> during playback, e.g. by pressing f or b, like Takashi Iwai's drvmidi?
>
>Not so easy; even more so if you want to have correct controller
>values.  Adjusting settings changed by sysexs would be almost
>impossible.
>

I wonder whether drvmidi actually does correctly restore controller and sysex
when you move during MIDI playback.  I haven't studied the drvmidi code in
detail.  I know the sound quality always seems to be correct
even when you move forwards and backwards very often in a piece with
lots of sysex and controller settings.

>However, these tools are meant as basic command-line utilities (and
>examples).  I think your suggestions would fit better into some GUI
>player.

Yes, you're right a GUI player can be much more powerful but I also like
command-line players like drvmidi because you can always run them without X
and moving forwards and backwards using the ncurses interface is easy.
It's a useful minimum functionality (being able to move forwards and backwards
in a MIDI file while it's playing) but it sounds like it'd be difficult
to extend arecordmidi to do this.

William



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