ROM Hack Is this idea possible?

[Gangsta_L]

Hi,

Currently I'm doing some stuff with music and DSMI applications on my DS in combination with my mix program, but I'd like to see some other programs which need a kind of line in. First: how to create a cable so you can use the DS's mic in as a line in? I thought that buying a headset for the DS and "edit" it with 2 normal tulip cables at the end where the headset should be (tulip 1 for line in, tulip 2 for line out). Don't know if this is possible?
And here my ideas:
1. An effect unit. I'm using the Kaos-DS program now for using effects over MIDI in my mix program, but I'd like to see a standalone application for the DS, with 3 effects: flanger, echo and filter. And ofcourse with editable parameters (for the flanger the strength, for the echo the length - 1/2 beat, 1 beat, 2 beats etc - and for the filter high pass and low pass). These can be edited with the touch screen, but in a way that you can assign which parameter is the X axis and which the Y axis. And for that, you'll need a BPM counter, which could be a manual BPM tap or (if possible) an automatic BPM counter?

2. A loop program. Something like Ableton Live, that you can record from the line in for 2 beats or more/less, and it loops automatically after the recording. Think that's pretty clear. Also, this will need a BPM counter (manual or automatic).

So, IF this is possible (editing the headset and making the homebrew) can a homebrewer PLEASE contact me?!

Regards,
Gangsta_L

 

[FAST6191]

First up my interest is video really so I am not too hot on anything beyond basic terminology and quality improvement, I will try and help though.

Theoretically though is should just be a case of desoldering a few wires (line in is nothing more than a tweaked microphone port), I am not sure you would get the normalising effect of standard line ins without a chunk of code though.
I also suggest reading this page:
http://nocash.emubase.de/gbatek.htm#dssound
This page (search for DStek if the link does not work for you):
http://www.google.com/search?q=cache:QZOPt...lient=firefox-a
And maybe these pages (they are more to do with rom audio though):
http://forum.gbadev.org/viewtopic.php?t=8674
http://d.hatena.ne.jp/loveemu/ (Japanese but the important stuff is in English and/or machine translation works well)

Oh and I assume you have heard of nitrotracker, it might make a good branch/fork for you to start from
http://nitrotracker.tobw.net/
if not dsmidiwifi:
http://dsmidiwifi.tobw.net/

 

[Gangsta_L]

riiiiight

I don't understand a thing of those memory and sound things.
And yes, I'm using DSMidiWiFi/DSMI at the moment for the effects control at the mix program. I'd really like to use Nitrotracker for normal drum loops but I couldn't get the loops work very well, but I'll try later and read the documentation a few times

but anyway thanks for your reply!

 

[FAST6191]

You got me thinking about stuff so think nothing of it, low level hardware/coding is not for everyone I guess (and I do not blame you).
I do believe however that ndslib (part of devkitpro/devkitarm) and even Palib (a very nice if not especially efficient (compared to ndslib and such) library/coding aid) both have nice sound capabilities well within scope of what you need.