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by YCN-
Mon Mar 12, 2018 4:05 pm
Forum: Graphics, sound and multimedia
Topic: Facial Detection and recognition
Replies: 5
Views: 7401

Re: Facial Detection and recognition

Hi, understood ! Since you want to do this for a school project it's always better to have a Proof Of Concept and then to see were you can go by yourself using your own solution. Please take a look at a project few friend of mine did : http://www.instructables.com/id/Prosopagnosia/ It actually allow...
by YCN-
Thu Mar 08, 2018 8:53 am
Forum: Graphics, sound and multimedia
Topic: Facial Detection and recognition
Replies: 5
Views: 7401

Re: Facial Detection and recognition

Hi, I believe that you made a miss conception, you're not going to implement your own algorithm, you're going to use those of openCV, it's very different. You're going to ask openCV to do the recognition. Well firstly I think that your conception of the program is wrong, the way you want to do this ...
by YCN-
Wed Mar 07, 2018 10:49 am
Forum: Graphics, sound and multimedia
Topic: Send and receive MIDI commands to/from USB MIDI device
Replies: 23
Views: 21188

Re: Send and receive MIDI commands to/from USB MIDI device

Hi guys, Thanks for the feedback, actually, I'm going to use another uC to do the midi message sending, it will also have some ADCs and DACs for buttons and also possibly for a CV out. This way I will do the following, the linux board (RPI for now) will do the high level processing : UI (with a scre...
by YCN-
Fri Feb 23, 2018 1:45 pm
Forum: Graphics, sound and multimedia
Topic: DIY looper/sampler
Replies: 5
Views: 2089

Re: DIY looper/sampler

Hey,

where did you end up ? Did you made it ? OH and why did you made it so big ahah?

Regards,

YCN-
by YCN-
Fri Feb 23, 2018 1:39 pm
Forum: Graphics, sound and multimedia
Topic: Pitch detection with Raspberry pi
Replies: 2
Views: 958

Re: Pitch detection with Raspberry pi

Hi there,

I believe you should find this lib interesting :

https://github.com/aubio/aubio

Regards,

YCN-
by YCN-
Fri Feb 23, 2018 9:40 am
Forum: Graphics, sound and multimedia
Topic: Where to start? Plug and Play Drummachine
Replies: 2
Views: 1152

Re: Where to start? Plug and Play Drummachine

Hey there folks, at first sorry for opening a new topic as the search for my particular project didnt help me at all. Im planning the following: I wanna build a very simple Drumcomputer without sequencer etc. It just should be able to make some Sound ;). Therefore i am going to save some drumsample...
by YCN-
Thu Feb 22, 2018 1:50 pm
Forum: C/C++
Topic: MIDI I/O on GPIO Pins (coded with C++)
Replies: 1
Views: 1091

Re: MIDI I/O on GPIO Pins (coded with C++)

Hi there, Well you got a very good idea here. > For Midi Clock it's not difficult but you'll need to have a UART @31250 baud which is not that easy with RPI clocks, but I believe that this is doable. Even if it's boring af, since you'll have to do some changement to the dts (and it may or may not wo...
by YCN-
Thu Feb 22, 2018 1:39 pm
Forum: Graphics, sound and multimedia
Topic: Software Serial C lib
Replies: 6
Views: 1069

Re: Software Serial C lib

Oh thanks Joan, I don't really feel confortable with the wave concept. Can you explain a bit more?

Regards,
by YCN-
Thu Feb 15, 2018 9:21 am
Forum: Graphics, sound and multimedia
Topic: Software Serial C lib
Replies: 6
Views: 1069

Re: Software Serial C lib

Thanks but it seems like you can only do Reads operation, whereas I actually need to do only write : "gpioSerialReadOpen Opens a GPIO for bit bang serial reads gpioSerialReadInvert Configures normal/inverted for serial reads gpioSerialRead Reads bit bang serial data from a GPIO gpioSerialReadClose C...
by YCN-
Thu Feb 15, 2018 8:35 am
Forum: Graphics, sound and multimedia
Topic: Software Serial C lib
Replies: 6
Views: 1069

Re: Software Serial C lib

Hi, Thanks for your answer, but I'm actually looking for something written in C, the solution to talk to the a python script doesn't really feels like a good solution to me. My sequencer software is fully written in C, that's why I can't afford using python, even though it seems like every damned th...
by YCN-
Wed Feb 14, 2018 2:51 pm
Forum: Graphics, sound and multimedia
Topic: Software Serial C lib
Replies: 6
Views: 1069

Software Serial C lib

Hey guys, I'm building a midi sequencer / groovebox, so far so good, the sequencer part is ready and functional, but here it is, as one would know, midi baudrate is incredibly boring : 31250 baud :shock: which was classic into the 80th and is no longer... I've a Raspberry pi 2, and with newer kernel...
by YCN-
Wed Jan 17, 2018 4:33 pm
Forum: Graphics, sound and multimedia
Topic: In-Car Music Player - via factory head unit aux-in
Replies: 7
Views: 2114

Re: In-Car Music Player - via factory head unit aux-in

Hi, indeed this is 100% possible. You can use the built-in jack and with a RCA/jack cable plug it into the AUX of your car. And... Well crappy sound you'll get. OR you can use a I2S DAC + an RCA/RCA cable, and you'll get pretty dope sound afterward. I used the PCM5102 which is cheap and easy to use,...
by YCN-
Wed Jan 17, 2018 4:23 pm
Forum: Graphics, sound and multimedia
Topic: How do I well set PLLD?
Replies: 2
Views: 901

Re: How do I well set PLLD?

Hi there, As you can see this post is from a while ago. But I think this thread can help : https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=182897&p=1205328#p1205328 The part in the I2S sound thread where we spoke about that issue: https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=8496&...
by YCN-
Fri Sep 01, 2017 8:03 am
Forum: Advanced users
Topic: I2S - Clock trouble
Replies: 11
Views: 3249

Re: I2S - Clock trouble

Oh I though you were confused with the difference between adresses and content. Well I can't answer your question because obviously the datasheet isn't agreed with the 0x26 or 0x27 indeed the datasheet pages 107 and 108 doesn't give those adresses. There's a lot of mysteries around this datasheet. I...
by YCN-
Thu Jul 13, 2017 8:09 am
Forum: Automation, sensing and robotics
Topic: Event Handler
Replies: 1
Views: 597

Re: Event Handler

Hi, Yes no problem with that, just use openCV to find who's face it is. And then just generate a voice with something like http://espeak.sourceforge.net/ to say something. A friend of mine did this instructable which will provide you good instruction to do the face recognition part : http://www.inst...
by YCN-
Tue Jul 04, 2017 7:38 am
Forum: Other
Topic: Yocto Pulseaudio build issue
Replies: 5
Views: 2985

Re: Pulseaudio build issue

I solved this problem. In the end it has something to do with dependency, since pulseaudio and alsa will both do some changement on other packet, you have to add pulseaudio in build/conf/local.conf : DISTRO_FEATURES = "ext2 pam opengl usbhost ${DISTRO_FEATURES_LIBC} pulseaudio " If that's not clear ...
by YCN-
Mon Jul 03, 2017 11:50 am
Forum: Other
Topic: Yocto Pulseaudio build issue
Replies: 5
Views: 2985

Re: Pulseaudio build issue

Hi,

Did you find out ? I'm facing the same issue when trying to install pulseaudio...

YCN-
by YCN-
Wed Jun 28, 2017 7:48 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread.
Replies: 909
Views: 438827

Re: The I2S sound thread.

Thanks for the answer but if I fooled myself that way I will not even have a close frequency from the frequency I expect which I do have. I think you calculated with 19.2 MHz osc when I used 500MHz osc. I calculate that way : I need to have bck = 44100*32*2 = 2822400 Hz = 2.8224 MHz I used PLLD = 50...
by YCN-
Tue Jun 27, 2017 12:39 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry PI Keyboard Buddy
Replies: 5
Views: 1285

Re: Raspberry PI Keyboard Buddy

Hi, Well I just remember something, you could very well use Jack, and pipe your audio directly into another software. I'm not sure what you can get from here, but I assume you might find some way to do what you want and even more That's just an example about piping voice into effects, or synth into ...
by YCN-
Tue Jun 27, 2017 10:02 am
Forum: Graphics, sound and multimedia
Topic: Raspberry PI Keyboard Buddy
Replies: 5
Views: 1285

Re: Raspberry PI Keyboard Buddy

If you don't care too much about the quality of the input there's plenty of USB DAC/ADC for less than 5$/€ on amazon ! For the fast FFT unfortunately I can't give you any leads, but I think it has been done plenty of time so you should find some. If you have a Bass to MIDI converter (I know that's n...
by YCN-
Tue Jun 27, 2017 9:59 am
Forum: Automation, sensing and robotics
Topic: Pay/play emulation station
Replies: 1
Views: 704

Re: Pay/play emulation station

Hi, Well I think you can manage do do something a bit more fancy than telling the other rpi to not take into account the USB stuff. But if you'd like to do that you can use a relay and hack the USB power supply. But well that's not amazin. What you should do is to do a tiny piece of software witch w...
by YCN-
Mon Jun 26, 2017 2:32 pm
Forum: Other
Topic: Kali Linux on Rasp 3... Problem?
Replies: 2
Views: 1706

Re: Kali Linux on Rasp 3... Problem?

Plug it on your network and get it's IP and SSH to it. It's possible you don't have the drivers. But beware of Kali and where you've download it, it might be very malicious.

YCN-
by YCN-
Mon Jun 26, 2017 2:31 pm
Forum: Français
Topic: Besoin de vos avis
Replies: 4
Views: 848

Re: Besoin de vos avis

Salut, Tout dépend de ce que tu fais à l'école, si c'est du web ou plutôt de l'embarqué. Dans tout les cas je pense qu'avoir une bonne base de C est super important. Du coup tu pourrais te lancer dans un projet sympa et actuel genre : faire une voiture télécomandé. Un petit robot? Un bateau j'en sai...
by YCN-
Mon Jun 26, 2017 9:56 am
Forum: Graphics, sound and multimedia
Topic: Raspberry PI Keyboard Buddy
Replies: 5
Views: 1285

Re: Raspberry PI Keyboard Buddy

Hi, That's doable, the only complicated stuff is : how you know what the guitar is playing? Can your guitar output MIDI notes? Then when it comes to play strings, it would depend on what kind of string you want to output. You can check sunvox software, I'm sure it has a MIDI in, and then you'll be a...
by YCN-
Fri Jun 23, 2017 1:16 pm
Forum: Advanced users
Topic: GPIO Access times
Replies: 3
Views: 648

Re: GPIO Access times

Hi, Well you can't say classic Linux will give you same stuff as RTEM. THAT'S NOT TRUE ! But more often that we'd think people are confused about what means Real Time. So the question is, why do you want your timer for? Why do you think you need a RT kernel ? If indeed you need a real time kernel wh...

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