Notices

Rofl... Is it possible to make an app for the N900 to be the amp for guitars?



Happy now?

You know there are miniature amps and pocket-sized effect processors (like Line6 pocket pod) available?

The iRig is a commercial product made by a large company which has spent years perfecting their DSP algorithms... With opensource the best bet would probably trying to apply LADSPA plugins in real-time and hope the delay isn't unbearable.

Also the hardware is not just a plug adapter, a DI unit/buffer amplifier is required and likely powered by the mic bias voltage.

I was looking for the same kind of application, even started a thread "guitar pedal effects". I was searching for a way to run this: http://fly.srk.fer.hr/~mvlah/fx_processor.html

source:http://linux-sound.org/

It seemed that it was the simple way for me to begin develop this kind of program. I also know that there is a lot of software and hardware for the same purpose, but I really also wanted to try running this on N900.

That info about the mic voltage bias, what we need to know is wether N900 sound (hardware)driver would be able to supply current to the guitar pickups, right?

Mmm i'm pretty sure that the n900 has nuff juice for the guitar.

I figured I'd dig up this grave since I'm curious if ExEf could be a candidate for a functional effects processor on nxx0's
It's bloody well old enough..
https://web.archive.org/web/20100219...//exef.xko.cz/
http://sourceforge.net/projects/exef/
rzr even did a custom deb for it ....it is possible he doesn't have it after such a long time..(mental note...should ask him)
uses alsa ..ExEf as a whole seems pretty lean compared to the more recent and modern processors..I'm wondering if it can jury-rigged for us.

To answer a couple mentions about "enough power" or "the nxx0 having enough for powering _ _ _ _" whatever...
The point of "a" pickup...or pickups is that "noise" is fed no differently than a microphone.
You don't need any more additional input power...
or needed power to run a pickup or pickups...
just microphone in...
for that matter ..I don't see why the necessity of an "input" mic port is even a need....since there isn't really an "mic" input port...but there is a natural device inbuilt mic on the nxx0.
So some silicone putty and slapping your nxx0 either on the inside of the instrument or outside (on the soundbox/chamber of course...where the most vibration can be picked-up would work)..of the instrument...turning the nxx0 into an outrageously capable oyster pickup.
(Personally I use dual stereophonic pickups and oysters in my harps and dulcimers..straight to one of my laptops...and use rakarrack, native, etc....
and then out through the headphone jack to either headphones for personal use ...or straight into one of my multi- effects processors and then from there straight to one of my amps)
.as far as output from the nxx0 goes...output through the headphone jack on the nxx0 to "power" something like an amp...well that is just silly...how many handheld devices do you know of that power amplifiers?
It doesn't "power" anything...for lack of a better term...to keep it simple...the pickup uses a very insignificant amount of juice to "transmit" the sound to an amp/ effects processor/ laptop ...whatever...transmitting yet again from that point to another after altering the sound to amplify it ...that doesn't have to be a huge consumer either...the output from the end point to be audible or stadium blasting is dependent on the power supply "from" the amp itself ...not the device "medium" (nxx0).
If you wished to use the (nxx0) speakers...you'd have to jury-rig a usb mic input...or something like that with a very loooong cable to the instrument...since if you have the device in close proximity or contact with the instrument utilizing the (nxx0) onboard mic. ..and outputting to the (nxx0) onboard speakers...you are gonna get feedback...don't need that...probably end up roasting your nxx0.

So yeah. there are saner options here...

1-Best option...(my fav. concept ) get an effects processor functioning on nxx0 (I would hope even through easy debian we could get ExEf running properly)...get some silicone...put a generous wad on the (nxx0) device..or a proper flexilble clamp to hold the (nxx0) device mic as close as possible to the where sound emits in greatest concentration (sound hole(s) ) in such a way as to still view and utilize the (nxx0) device screen to be able to play/ change your (nxx0) device onboard effects (ie- ExEf) on the fly. Then simply output to your headphones ..
or output from the headphone port 1/8" male to 1/8" male to your mic input on computer...
or utilize a couple of gold-plated 1/4" female to 1/8" male adapters
http://www.ebay.ca/itm/290634585862?...84.m1436.l2649
cheap or expensive ...depends on what quality you want..
and output to your amp

2- Not-as-fun-option ....No need for an (nxx0) onboard effects processor....just use a flexible clamp or silicone putty to position the (nxx0) device mic. doesn't matter if it is easily accessible (ie- inside the soundbox or out of sight since the nxx0 is acting simply as "the" pickup ...nothing more). Then Utilize the (nxx0) device bluetooth (or other methods of transmission) straight to a laptop and utilize whatever from there...more processors tools and from there feed it through the laptops headphone jack to headphones or an amp...

After some mad hunting...
Most definitely there may be a better than ExEf...

Like ...gtkgep..
hell you can create effects..plugins.. for it.
gtk base..
the base audio requirement is soundblaster 16
which just so happens to work already...perfectly fine... for dosbox...even on the 770.
The system requirements are nice and low...
No impossible demands it seems...
If any effects processor looks JUST perfect for our devices from the 770 on up to the n900..
with a nice looking interface that functions with our devices...
that appears to have the best audio alternative for us...
and all around looks like the one which is the most hassle-free in getting it working for us
it's gtkgep.
http://gtkgep.prv.pl/
I'm rooting through the files for it as we speak..
This program I want to definitely see on our devices....


Pitchbox is a possible (conceptually odd program) one as well...it would necessitate the use of easy debian at the least...for the jre 5 (or higher) requirements...and would be limited to perhaps just the n900
http://www.pitchtech.ch/PitchBox/index.html

i would avoid pitchbox because of jre requirement. i did take a quick look at exef yesterday but didn't go any further because of the tcl/tk interface. Like gtkgep, the interface would need some work to make it usable for us. Maybe a tabbed interface like pierogi or a screen full of buttons that present dialog boxes. gtkgep would probably be easier to adapt however when was it last updated?

I concur with your estimation of pitchbox's viability ...
when was gtkgep last updated?
yeah...that is the million dollar question.
Lotta distros used this program...
seems that some still use it ....
freebsd and 'buntu studio I believe do...(or did anyway..it is confusing since I have seen this for example for freebsd 8.2-released in 2013- -which is still a viable release until the year's end- and gtkgep is there in the package list http://distrowatch.com/table.php?dis...on=8.2#pkglist..)...

(correction it was on a wishlist for 'buntu studio.
But it was made for freebsd, arch and slack.. as well as mandriva, ROSA and ALT..
I know there are more though.) it depends ..also I have read in the same breath that it is available for freebsd 8.2 it has been abandoned due to lack of maintenance...back in 2011-ish ...so I'm finding conflicting info...
I believe what is supposedly functioning and what has been abandoned are (hopefully) ports .. and nothing more...

.I've mucked about with arch and slack a bit more than the rest ...for sure,
I like freebsd...but it doesn't play well with any of my computers...
mandriva ROSA and ALT I know very little about...Tried Rosa out ...love the set up...but boy I found it irksome to use....All in all...I cannot say I would be accomplished enough to be effective after mucking about with distros I am not comfortable with (due to lack of exposure).....all the way to distros I've never ever used... making me feel downright alien in...and I've played with some off the beaten track distros in my time...but these distros aren't my norm...or else I could test out gtkgep.
I do know that ROSA 2012 release actually has the gtkgep package...
http://pkgs.org/rosa-lts-2012/rosa-c...86_64.rpm.html
properly maintained too...but the distro itself I had probs with...perhaps I simply need a day or two from it to mull it over...

Correction again...Openmandriva also has gtkgep(gtk guitar (don't see why it won't work for any electfied instrument with proper pickups) effects processor)
I don't know what was up with Rosa...couldn't wrangle it...
Openmandriva I finally muddled through...weird since it pretty much IS Rosa ...
Anyway...
Openmandriva 2014.1 is what I have on a small hard-drive I use for distro testing and the like... in a secondary removable bay on one of my Xperimental laps.
Anyway...Openmandriva 2014 has gtkgep 2013 available for it.
And after running down the dependency rabbit hole on an rpm.. I am completely not familiar with...(actually I'm not familiar with rpms at all..I'm sooo ignorant ...noob central here..with my city map in hand...binoculars and camera around my neck...like a complete tourist )
Anyway...got gtkgep installed and running...
but my awkwardness around rpms doesn't help...
especially since I am at a loss for the proper installation/ manipulation of the plugins files ...
why o why couldn't they just make a deb for cryinoutloud.

But yup...it sure isn't dead...
she ain't abandonware that's for sure.
but I think someone more savvy than I will have to work this into our devices who knows more about such magics beyond my ken...
I imagine for someone who is familiar it won't take a heartbeat to do...

If this is left to me to figure out for our devices...
I'm quick on the uptake and all...buuttttttt...
oooh...we'll be waitin' a while.




It installed without any problems.
the program works...
but I'm stumped getting the plugins functioning..

Ok ...
got some help from a grand fella...
Boy o boy ...
[palm-smack to forehead]
the reason why I couldn't get the plugins to work is...
I didn't install them properly ..
I did install gtkgep properly...
but not the necessary libraries..
here is the real simple way of installing it on
Openmandriva 2014 86_64 with the files from the previous post.

as terminal as root

# urpmi gtkgep

and

# urpmi lib64gtkgep0

if your arch is 64bit
or

# urpmi libgtkgep0

if it is 32bit

aaaannnnd it works!

halfway now to getting this on a .deb


speaking of which...
I have mucked about with this and "alien"
perhaps it's me and I'm not doing something right...
or there is something I've not considered...
but I'm not having good luck with the "easy" way to turn this .rpm to a functioning deb.
I need to mull it over while I play with the brand new toy.
ok enough fun with the new effects processor.
So yeah...
I used the "easy" way with "alien"
sure it makes the debs
but there is definitely errors in the outputted dialogue flashing by ...with the headers if my vision and short-term memory isn't too skewed ..
the debs install into a fresh lubuntu 15 64bit fine and dandy...
the title shows up inthe menu under "audio and sound" but the gtkgep icon is instead a "cog" icon.. and naturally the program launches (or attempts to rather) but nothing happens.
Still mulling it over...
I'm thinking perhaps the "easy" way of turning this into a .deb
will possibly end up becoming the "hard" way ...

Hm...I'm going to try something..
back tomorrow..