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by yogi2016
Sun Jan 15, 2017 9:51 pm
Forum: C/C++
Topic: First program in Raspberry Pi 2
Replies: 28
Views: 3320

Re: First program in Raspberry Pi 2

After reading through the thread it seems to me you really don't want or need the RPi and really should be looking into an embedded uController such as the Teensey3 or an STM32F407-disco. Both are 32bit cores that offer high clock speed, 70-160MHz, and plentiful Ram and Flash on-chip. Both are suppo...
by yogi2016
Sun Jan 15, 2017 7:52 pm
Forum: Graphics, sound and multimedia
Topic: Nordmodular/modular environment?
Replies: 7
Views: 1564

Re: Nordmodular/modular environment?

Though not quite what you are asking about but close to the concept, take a look at the Zynthian project: http://zynthian.org/#section-home Started as a host for the ZynSubAddFx synth but has grown to include other Linux synths. And now has Mod-ui included, which allows patching of synth and effects...
by yogi2016
Tue Jan 10, 2017 2:59 pm
Forum: Graphics, sound and multimedia
Topic: 3.5" LCD Recalbox and fbcp compiling
Replies: 5
Views: 4685

Re: 3.5" LCD Recalbox and fbcp compiling

Yes that should work. The bin is a pre-compiled file and as long as you put it into the correct folder it will work. Follow this: Get or compile the right binary from https://github.com/ian57/rpi-fbcp according to your Pi version. Copy it in the /usr/bin directory. You'll need to get write access on...
by yogi2016
Mon Jan 09, 2017 1:53 pm
Forum: Graphics, sound and multimedia
Topic: 3.5" LCD Recalbox and fbcp compiling
Replies: 5
Views: 4685

Re: 3.5" LCD Recalbox and fbcp compiling

So I don't know how much help I can be as I don't know recalBOX and have a 3.5" LCD coming from China. As I understand, the fbcp program moves the screen data from framebuffer 0, HDMI, to framebuffer 1, LCD. This allows you to display your desktop on the LCD but has a performance hit so you can't ac...
by yogi2016
Wed Jan 04, 2017 3:31 am
Forum: Graphics, sound and multimedia
Topic: Retro-Fit Pi Noir Camera
Replies: 14
Views: 2209

Re: Retro-Fit Pi Noir Camera

You do know that the IR LEDs don't emit visible light. Just like a TV remote. You could put a DMM inline on the Vcc to check the current flow, should go up when the photocell is dark. Or you could use a digital video cam that is sensitive to IR to 'see' the IR LED. Radio Shack used to have a simple ...
by yogi2016
Tue Jan 03, 2017 11:29 pm
Forum: Graphics, sound and multimedia
Topic: Retro-Fit Pi Noir Camera
Replies: 14
Views: 2209

Re: Retro-Fit Pi Noir Camera

Looking over the schema, my overview is: Pin 1 Vcc, voltage to LED array Pin 2 Gnd Pin 3 LED feedback In the center is a circle with a rectangle in it, this is a photocell. It's resistance is adjusting the bias of the center transistor, Q1. Q1 is controlling the bias to Q2, leftmost transistor. Q1 a...
by yogi2016
Sat Dec 31, 2016 6:12 pm
Forum: HATs and other add-ons
Topic: Introducing "ARMinARM", an STM32 Cortex-M3 breakout board
Replies: 21
Views: 20817

Re: Introducing "ARMinARM", an STM32 Cortex-M3 breakout boar

Just discovered this, very interesting. What got my attention was the possibility of running the Midibox.org's MIOS32 firmware and apps on this board. For background: Midibox projects consists of a base RTOS package, MIOS32, tailored for building midi devices such as synths, sequencers and knob boxe...
by yogi2016
Fri Dec 23, 2016 7:33 pm
Forum: Graphics, sound and multimedia
Topic: Simplest thing that might work (audio detector)
Replies: 7
Views: 1446

Re: Simplest thing that might work (audio detector)

You could try something like this http://www.ebay.co.uk/itm/Sound-High-Sensitivity-Microphone-Sensor-Detection-For-Arduino-Module-AVR-PIC-UK-/122239413588?hash=item1c76096d54:g:-tUAAOSwLVZVtfMn put it on a Pi zero gpio pin WiFi dongle to your network with a script to send a email or a script to sou...
by yogi2016
Fri Dec 23, 2016 7:31 pm
Forum: Graphics, sound and multimedia
Topic: Simplest thing that might work (audio detector)
Replies: 7
Views: 1446

Re: Simplest thing that might work (audio detector)

Another idea for an easy to build ADC. A Vu meter chip such as LM3914 see: http://www.next.gr/circuits/LED-VU-Meter-by-IC-LM3914-l22602.html -would have to be change a little for 3.3V http://www.ti.com/lit/ds/snvs761b/snvs761b.pdf -datasheet for details In this circuit there are 6 out levels, they s...
by yogi2016
Fri Dec 23, 2016 6:40 pm
Forum: Graphics, sound and multimedia
Topic: Simplest thing that might work (audio detector)
Replies: 7
Views: 1446

Re: Simplest thing that might work (audio detector)

One of the simplest A to D converters would be a comparator. The Mic output (might need to be amped some) goes to the input of the comparator, the threshold is set to a level to block ambient sounds. When the level is above the threshold the comparator outputs a logic high that can be read by a GPIO...
by yogi2016
Thu Dec 15, 2016 11:47 pm
Forum: Graphics, sound and multimedia
Topic: RPi Synthesizer Project
Replies: 11
Views: 4002

Re: RPi Synthesizer Project

Great projects! Love the cases, really love the Moog 'Wood and Steal' style for the studio. I've been building Midibox.org projects for awhile and really want to do a combo RPi/Midibox build. The great thing with the MB universe is the modular nature, with a great RTOS running on the STM32F4 Discove...
by yogi2016
Mon Oct 17, 2016 3:14 pm
Forum: Graphics, sound and multimedia
Topic: SidBerry - RaspberryPi & SID 6581
Replies: 42
Views: 7213

Re: SidBerry - RaspberryPi & SID 6581

That sounds great, will start writing up some info :)
Yogi
by yogi2016
Sun Oct 16, 2016 5:08 pm
Forum: Graphics, sound and multimedia
Topic: SidBerry - RaspberryPi & SID 6581
Replies: 42
Views: 7213

Re: SidBerry - RaspberryPi & SID 6581

:) No webpage, sad to say. Will share to all, for sure. I'll post info to the Dropbox folder for now (at some point I should start a blog) , but feel free to use/post as you like. Should be able to start HW tests soon; have the MBHP SID module on hand but need to build up a GPIO-to-MB cable socket b...
by yogi2016
Sun Oct 16, 2016 3:50 pm
Forum: Graphics, sound and multimedia
Topic: SidBerry - RaspberryPi & SID 6581
Replies: 42
Views: 7213

Re: SidBerry - RaspberryPi & SID 6581

Yes, they are very similar as they share the same underlying hardware (a memory mapped sound chip) please note that that python script doesn't read directly a SID file, instead it reads a dump file derived from the original .sid file. This dump file is the raw data output ready to be passed to the ...
by yogi2016
Mon Oct 10, 2016 2:29 am
Forum: Graphics, sound and multimedia
Topic: SidBerry - RaspberryPi & SID 6581
Replies: 42
Views: 7213

Re: SidBerry - RaspberryPi & SID 6581

Luckily, due to the nature of the sid file playback, the sid chip has to receive few bytes every 1/50th of a second, so there is plenty of time to setup the gpios (both data and address) and then finally strobe the write line. Moreover, there no need to setup the gpios simultaneously. When all the ...
by yogi2016
Sun Oct 09, 2016 5:43 pm
Forum: Graphics, sound and multimedia
Topic: SidBerry - RaspberryPi & SID 6581
Replies: 42
Views: 7213

Re: SidBerry - RaspberryPi & SID 6581

Many thanks for the recent bumps on this topic, very cool. I've been messing with Midibox projects for quite some time, but only started with the RPi a few months ago. For me, adding sound chips to RPi was one of my reasons for getting a Pi :) Your project demonstrates that the GPIO is very capable ...
by yogi2016
Thu Sep 29, 2016 12:24 pm
Forum: Beginners
Topic: How to install PRG?
Replies: 4
Views: 994

Re: How to install PRG?

Humm, that's interesting. I hadn't had that problem with unzipping. Glad it worked out for you :)
For a little update on the shortcut issue, found this guide:
http://www.raspberry-projects.com/pi/pi ... -shortcuts
Yogi
by yogi2016
Fri Sep 23, 2016 3:35 am
Forum: Graphics, sound and multimedia
Topic: midieditor
Replies: 1
Views: 517

Re: midieditor

Very nice, will keep this project in mind. Lately been using Seq24; once you get the hang of the interface it's pretty useful.
Yogi
by yogi2016
Thu Sep 08, 2016 10:42 pm
Forum: Graphics, sound and multimedia
Topic: Reading USB line in
Replies: 4
Views: 1096

Re: Reading USB line in

I think is would be possible if you used a USB audio card that had Mic in, maybe with PD to read the digital stream. But if you are looking to send an audio stream from another source, don't know. Interested to hear other opinions, I'm just too new to help much.
Yogi
by yogi2016
Sun Jul 31, 2016 3:22 am
Forum: Graphics, sound and multimedia
Topic: Chiptune with an AY-3-8910 chip
Replies: 8
Views: 4531

Re: Chiptune with an AY-3-8910 chip

You may be interested in some of the projects @ Midibox.org And this user project: http://wiki.midibox.org/doku.php?id=midibox_ay_ym_v2 Though it is using an 8bit PIC uController, the AY interface code may be helpful. Also, the use of shift registers to control the AY rather than a parallel connecti...
by yogi2016
Thu Jul 28, 2016 8:04 pm
Forum: Graphics, sound and multimedia
Topic: Sound Relay
Replies: 10
Views: 2155

Re: Sound Relay

Here is a really cheap single relay board http://www.miniinthebox.com/5v-relay-module-for-arduino-works-with-official-arduino-boards_p1141403.html?pos=ultimately_buy_1&prm=2.3.5.0 You could power the relay from the +5V at the GPIO; the logic control is stated as HiZ +5v, so with just a current limit...
by yogi2016
Thu Jul 28, 2016 7:40 pm
Forum: Graphics, sound and multimedia
Topic: Sound Relay
Replies: 10
Views: 2155

Re: Sound Relay

@YCN I was saying that there are no specific 'audio switches', any relay will work fine, something like a SPDT. There are relay boards for Arduino type projects (and others such as Grove). Here is one for the RFdunio https://www.sparkfun.com/products/13218 It's designed to run off 3.3V logic so shou...
by yogi2016
Wed Jul 27, 2016 1:25 pm
Forum: Graphics, sound and multimedia
Topic: Sound Relay
Replies: 10
Views: 2155

Re: Sound Relay

Switching audio signals is usually done with relays, because of the total isolation. Controlling via GPIO, would need some transistors to drive the current to the relay's coil. You could look at some stompbox designs to get a feel, http://www.diystompboxes.com/smfforum/ You could also handle the swi...
by yogi2016
Wed Jul 20, 2016 1:44 am
Forum: Beginners
Topic: How to install PRG?
Replies: 4
Views: 994

Re: How to install PRG?

Hi Klricks I guess I wasn't clear; I moved the Raspberry Pi version of Sun Vox from the downloaded zip on my Win machine ( It's included with the Window versions in one zip package). This app DOES run on the Pi; I just don't know how to make a shortcut on the desktop or Menu, so I can launch it a li...
by yogi2016
Tue Jul 19, 2016 8:50 pm
Forum: Beginners
Topic: How to install PRG?
Replies: 4
Views: 994

How to install PRG?

Hi, Just fired up for the first time. Installed NOOBS on a Pi2 B and checking out *nix (been on windoze since win98). So apt-get didn't find SunVox; ok setup SSH and moved my local SV on RPi copy onto the SD. Then moved from tmp to /home/pi/music/SunVox and set the permissions, I can double click it...

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