Message-ID: <001b01bdc6e8$0594ebc0$8704ac98@thomashe>
From: "Christian Henz" <ChrHenz AT gmx DOT de>
To: <djgpp AT delorie DOT com>
Subject: Thoughts on a multitrack HD-rec. program (OT ?)
Date: Thu, 13 Aug 1998 20:24:49 +0200
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Hi everyone !
I have been thinking of creating some very basic multitrack HD-recording =
software.
( using a normal soundcard (like SB16 etc.), doing some multitracking, =
serving as a musical notebook or as a composing tool, maybe even to do =
small demos, easy to use, free )
Here is my concept so far:
Recording:
You can record 2 tracks at once using the stereo line in of your =
soundcard (maybe also mic input). At the same time, the tracks already =
recorded are played back on the stereo line out of your soundcard (or =
headphone out). After recording, you have a new track-file and a =
mixer-channel assigned to it.
The tracks:
=20
Each track is represented by an individual file. You can work on =
that file in a track-window (editing, maybe cut and paste, importing =
etc.). The track-window would work and look like some .WAV editor. Maybe =
I'll even use .WAVs.
=20
Mixing:
Mixing is not done in realtime. You do pan and volume settings on =
your tracks and after that you just hit some "render mix" button and it =
will produce a stereo output-file that will then be played back. At the =
end of your session you could then take that (.WAV) output-file and use =
it with any .WAV player/editor (do some "mastering") and maybe even put =
it on a CD-R !
EQs, dynamics and FX:
I also thought of those. I have no idea how to actually code them, =
but we'll see :) They would be controlled from the "mixer" and they =
would not be real-time as well. Everytime you change the settings, the =
track will be recomputed. Of course, the original track will always be =
kept, so everything is "non-destructive" [ the magic word of =
HD-recording ;) ].
The program surface would consist out of two basic windows:
Mixer window:
Here you have some kind of virtual channel strip for every track you =
create/record. You can do all the basic things you would do with a =
normal mixing desk. Most important: pan/volume settings.=20
Track window:
Edit the track like described above.
This is the concept so far. Now for the programming issues:
Basically, the program would consist of some basic parts:
The I/O engine that records/plays back the input/output file =
simultaniously.
The rendering engine, that produces the playback file out of the =
individual tracks. Since this isn't real time, I don't see any problems =
here (am I wrong ?).
The rendering engine that creates a version of an indidual track =
were all the EQ settings etc. are computed. The output-file of this =
engine would then be used in the mixing engine.
The .WAV editing/cut & paste stuff.
Any comments/ideas ? Anyone intrested in working on such a project ?
Has anyone tried to do something like this and can share some of his/her =
experiences so far ?=20
Anyone into sound programming ?
Now for the DJGPP-specific part:=20
Are there libs for DJGPP that could handle the hardware part of this =
concept (recording and playing back large .WAV-files at the same time) ? =
What about MIDAS ?
If not, is there some lib that would at least do all the low-level stuff =
(like DMA buffers, mixer-settings etc.)
Any comments/ideas are apreciated...
Christian.
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<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2></FONT><FONT color=3D#000000 size=3D2>Hi everyone =
!</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I have been thinking of creating =
some very basic=20
multitrack HD-recording software.</FONT></DIV>
<DIV><FONT size=3D2>( using a normal soundcard (like SB16 etc.), doing =
some=20
multitracking, serving as a musical notebook or as a composing tool, =
maybe even=20
to do small demos, easy to use, free )</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Here is my concept so =
far:</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Recording:</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> You can record 2 =
tracks at=20
once using the stereo line in of your soundcard (maybe also mic input).=20
</FONT><FONT color=3D#000000 size=3D2>At the same time, the tracks =
already recorded=20
are played back on the stereo line out of your soundcard (or headphone =
out).=20
After recording, you have a new track-file and a mixer-channel assigned =
to=20
it.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT size=3D2></FONT>
<DIV><FONT color=3D#000000 size=3D2>The tracks:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> Each track is =
represented by=20
an individual file. You can work on that file in a track-window =
(editing, maybe=20
cut and paste, importing etc.). The track-window would work and look =
like some=20
.WAV editor. Maybe I'll even use .WAVs.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV></DIV>
<DIV><FONT size=3D2>Mixing:</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> Mixing is not =
done in=20
realtime. You do pan and volume settings on your tracks and after that =
you just=20
hit some "render mix" button and it will produce a stereo =
output-file=20
that will then be played back. At the end of your session you could then =
take=20
that (.WAV) output-file and use it with any .WAV player/editor (do some=20
"mastering") and maybe even put it on a CD-R !</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>EQs, dynamics and FX:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> I also thought of =
those. I=20
have no idea how to actually code them, but we'll see :) They would be=20
controlled from the "mixer" and they would not be real-time as =
well.=20
Everytime you change the settings, the track will be recomputed. Of =
course, the=20
original track will always be kept, so everything is =
"non-destructive"=20
[ the magic word of HD-recording ;) ].</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000 size=3D2>The program surface would consist =
out of two=20
basic windows:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Mixer window:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> Here you have =
some kind of=20
virtual channel strip for every track you create/record. You can do all =
the=20
basic things you would do with a normal mixing desk. Most important: =
pan/volume=20
settings. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Track window:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> Edit the track =
like described=20
above.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2></FONT><FONT color=3D#000000 =
size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>This is the concept so far. Now for =
the=20
programming issues:</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Basically, the program would consist of some basic=20
parts:</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> The I/O engine =
that=20
records/plays back the input/output file simultaniously.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> The rendering =
engine, that=20
produces the playback file out of the individual tracks. Since this =
isn't real=20
time, I don't see any problems here (am I wrong ?).</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2> The rendering =
engine that=20
creates a version of an indidual track were all the EQ settings etc. are =
computed. The output-file of this engine would then be used in the =
mixing=20
engine.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000 size=3D2> <FONT =
color=3D#000000>The .WAV=20
editing/cut & paste stuff.</FONT></FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Any comments/ideas ? Anyone intrested in working on =
such a=20
project ?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Has anyone tried to do something like this and can =
share some=20
of his/her experiences so far ? </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Anyone into sound programming ?</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Now for the DJGPP-specific part: =
</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Are there libs for DJGPP that could handle the =
hardware part=20
of this concept (recording and playing back large .WAV-files at the same =
time) ?=20
What about MIDAS ?</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>If not, is there some lib that would at least do all =
the=20
low-level stuff (like DMA buffers, mixer-settings etc.)</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Any comments/ideas are apreciated...</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Christian.</FONT></DIV>
<DIV> </DIV></BODY></HTML>
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