length in seconds would be nice, for information purpose

fix the mono dumper, the panning has to be used

when we close the player, finish to play all the data.

up/down in tag window = move left or right in time (more generaly, find
good keyboard shortcuts to move left/right in time, ie the part of
tracks which is displayed)

class marks by alpha/beta order

when we open, verify it is a regular file, otherwise strange error messages

save the gui stuff (pos, size, on/off) in the save file

? yes_no can return yes/no, change the code to use it instead of callbacks

? smooth the overload of the preview stuff (a little overload is
? acceptable, the more red the more overload)

? modification of a marker while in play mode, take it into account
? if it is in use (ie is selected as a start or stop marker)
? (currently, before to play, we copy the value of the marker, so
? changing it won't affect the live player)

? up/down tracks relatively to them

? when clicking "ok" in the recorder, and no record has been done => no error
? message

when modifying 1 position, redraw only affected track (so
integrate a track * in the struct pos)

better handling of the mouse wheel to move audio track view

? use 'space' and 'escape' to play/stop the sound
? (do we need to keep "audio already in use", thinking about it?)

check places with modal windows (they must be destroyed before doing
anything else)

? read mp3
? read ogg

? handle history (later (maybe), not in 0.1)

? clean callbacks (1 callback only calling another function may be
? replaced by the function and can disappear)

? write help system

? make vertical lines for markers

make an equalizer, a cut (to make a distortion, coupled with
a gain and a lowpass), low/band/high pass filters, inverted
(to do weird things with stereo files)

? when deleting a record track, propose to delete the recorded data on disk

#raw: separate big and little endian

record: conserv previous setting (record from mark for instance)

load: do a chdir because some files may be relative in the saved file

delete_track: allow deleting of audio file on disk

do a command-line dumper (songs toto.sng -dump)
